Re: Re: Help about a technical interview I had PLEASE!

2000-09-18 Thread John Barnes


- Original Message -
From: "John Barnes" [EMAIL PROTECTED]
Newsgroups: groupstudy.cisco
Sent: Sunday, September 17, 2000 11:48 PM
Subject: Re: Help about a technical interview I had PLEASE!


 See comments below.


 --- "David L. Blair" [EMAIL PROTECTED] wrote:
 
   1) What is the size of a token ring frame?
   My answer: Token ring has a variable frame size.
   His answer: 3 bytes..
  
   Isn't that the size of the Token frame?
 
  Yes.
 
  
   2) What the MTU of a token ring frame?  (Isn't
  this
   about the same question as #1?)
   My answer: slightly larger that 16K (I couldn't
   remember the exact number)
   His answer: about 4470 bytes .
 
  He is correct.

 No, he isn't.  Token ring has a variable MTU.
Oops...the maximum is 18k.  I'll go with Priscilla's answer over that of Mr.
Giles :)


 
  
   Ahh... what?  He claimed I was thinking about
   FDDI.g  Ah. Who's thinking about what?
  
   3) What is the decision making process involved
  when a
   packet enters a router?  What three criteria are
  used
   to make this decision?
  My answer:  It depends. Is this the first
   packet with this destination to arrive at this
  router?
What switching mode is the router configured for.
 
  Most routers actually do not switch that requires a
  switching module in the
  router. Since routers have to make a routing
  decision on a packet, by
  default a router reads the whole packet before it
  makes a decision that is
  why routers forward packets slower than a switch.  A
  switch is basically a
  fixed function bridge that can have one of three
  modes: Cut Through, Store
  and Forward, or Fragment Free.
 


 Actually, every router does.  Unless you disable it
 with a no ip-route cache on the interface, almost
 every Cisco router does fast switching by default.
 This means the first packet is checked against the
 routing information base, then subsequent packets
 recieved on the same interface with the same
 destination are fast switched using the route cache,
 not process switched.  Regardless, the first packet
 received for a given destination on an interface is
 ALWAYS process switched.


  
  His answer:  Forget about that stuff. how
  does
   it determine which route to use.
  
  My answer:  longest match in the routing
  table
  
  His answer:  What if multiple routes exist
  in
   the table.
  
  My answer:  It depends.
  
 
 
 Maybe I should have picked up on this stuff
  when
   the recruiter asked me with BGP was a DV or LS
  based
   routing protocol.  My answer. ahh.neither, it's
  path
   vector.
 
  BGP is an External Gateway Protocol which most
  closely resembles DV.
 

 BGP is a Path Vector routing protocol, although it
 more closely resembles a DV, it is not.


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Re: Re: Help about a technical interview I had PLEASE!

2000-09-18 Thread Priscilla Oppenheimer

Well I was kind of wondering what variable maximum meant! ;-)

Seriously, I just checked IEEE 802.5 and it doesn't specify a maximum frame 
size. It just says that the maximum token holding timer is 8.9 
milliseconds. A station can hold onto the token while sending its bits for 
a maximum of 8.9 milliseconds. After 8.9 milliseconds, it must relinquish 
control of the token. So here's the math:

4 Mbps = 4000 bits in a millisecond
In 8.9 milliseconds a station could send 8.9 x 4000 bits = 35600 bits
35600/8 = 4450 bytes
For 16 Mbps, the max frame size = 4450 x 4 = 17800 bytes

QED

Priscilla


At 08:15 AM 9/18/00, John Barnes wrote:

- Original Message -
From: "John Barnes" [EMAIL PROTECTED]
Newsgroups: groupstudy.cisco
Sent: Sunday, September 17, 2000 11:48 PM
Subject: Re: Help about a technical interview I had PLEASE!


  See comments below.
 
 
  --- "David L. Blair" [EMAIL PROTECTED] wrote:
  
1) What is the size of a token ring frame?
My answer: Token ring has a variable frame size.
His answer: 3 bytes..
   
Isn't that the size of the Token frame?
  
   Yes.
  
   
2) What the MTU of a token ring frame?  (Isn't
   this
about the same question as #1?)
My answer: slightly larger that 16K (I couldn't
remember the exact number)
His answer: about 4470 bytes .
  
   He is correct.
 
  No, he isn't.  Token ring has a variable MTU.
Oops...the maximum is 18k.  I'll go with Priscilla's answer over that of Mr.
Giles :)
 
 
  
   
Ahh... what?  He claimed I was thinking about
FDDI.g  Ah. Who's thinking about what?
   
3) What is the decision making process involved
   when a
packet enters a router?  What three criteria are
   used
to make this decision?
   My answer:  It depends. Is this the first
packet with this destination to arrive at this
   router?
 What switching mode is the router configured for.
  
   Most routers actually do not switch that requires a
   switching module in the
   router. Since routers have to make a routing
   decision on a packet, by
   default a router reads the whole packet before it
   makes a decision that is
   why routers forward packets slower than a switch.  A
   switch is basically a
   fixed function bridge that can have one of three
   modes: Cut Through, Store
   and Forward, or Fragment Free.
  
 
 
  Actually, every router does.  Unless you disable it
  with a no ip-route cache on the interface, almost
  every Cisco router does fast switching by default.
  This means the first packet is checked against the
  routing information base, then subsequent packets
  recieved on the same interface with the same
  destination are fast switched using the route cache,
  not process switched.  Regardless, the first packet
  received for a given destination on an interface is
  ALWAYS process switched.
 
 
   
   His answer:  Forget about that stuff. how
   does
it determine which route to use.
   
   My answer:  longest match in the routing
   table
   
   His answer:  What if multiple routes exist
   in
the table.
   
   My answer:  It depends.
   
  
  
  Maybe I should have picked up on this stuff
   when
the recruiter asked me with BGP was a DV or LS
   based
routing protocol.  My answer. ahh.neither, it's
   path
vector.
  
   BGP is an External Gateway Protocol which most
   closely resembles DV.
  
 
  BGP is a Path Vector routing protocol, although it
  more closely resembles a DV, it is not.
 
 
  __
  Do You Yahoo!?
  Yahoo! Mail - Free email you can access from anywhere!
  http://mail.yahoo.com/
 
  **NOTE: New CCNA/CCDA List has been formed. For more information go to
  http://www.groupstudy.com/list/Associates.html
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Priscilla Oppenheimer
http://www.priscilla.com

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Re: Help about a technical interview I had PLEASE!

2000-09-17 Thread John Barnes

See comments below.


--- "David L. Blair" [EMAIL PROTECTED] wrote:
 
  1) What is the size of a token ring frame?
  My answer: Token ring has a variable frame size.
  His answer: 3 bytes..
 
  Isn't that the size of the Token frame?
 
 Yes.
 
 
  2) What the MTU of a token ring frame?  (Isn't
 this
  about the same question as #1?)
  My answer: slightly larger that 16K (I couldn't
  remember the exact number)
  His answer: about 4470 bytes .
 
 He is correct.

No, he isn't.  Token ring has a variable MTU.  


 
 
  Ahh... what?  He claimed I was thinking about
  FDDI.g  Ah. Who's thinking about what?
 
  3) What is the decision making process involved
 when a
  packet enters a router?  What three criteria are
 used
  to make this decision?
 My answer:  It depends. Is this the first
  packet with this destination to arrive at this
 router?
   What switching mode is the router configured for.
 
 Most routers actually do not switch that requires a
 switching module in the
 router. Since routers have to make a routing
 decision on a packet, by
 default a router reads the whole packet before it
 makes a decision that is
 why routers forward packets slower than a switch.  A
 switch is basically a
 fixed function bridge that can have one of three
 modes: Cut Through, Store
 and Forward, or Fragment Free.
 


Actually, every router does.  Unless you disable it
with a no ip-route cache on the interface, almost
every Cisco router does fast switching by default. 
This means the first packet is checked against the
routing information base, then subsequent packets
recieved on the same interface with the same
destination are fast switched using the route cache,
not process switched.  Regardless, the first packet
received for a given destination on an interface is
ALWAYS process switched.


 
 His answer:  Forget about that stuff. how
 does
  it determine which route to use.
 
 My answer:  longest match in the routing
 table
 
 His answer:  What if multiple routes exist
 in
  the table.
 
 My answer:  It depends.
 
 
 
Maybe I should have picked up on this stuff
 when
  the recruiter asked me with BGP was a DV or LS
 based
  routing protocol.  My answer. ahh.neither, it's
 path
  vector.
 
 BGP is an External Gateway Protocol which most
 closely resembles DV.
 

BGP is a Path Vector routing protocol, although it
more closely resembles a DV, it is not.  


__
Do You Yahoo!?
Yahoo! Mail - Free email you can access from anywhere!
http://mail.yahoo.com/

**NOTE: New CCNA/CCDA List has been formed. For more information go to
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Re: Help about a technical interview I had PLEASE!

2000-09-15 Thread Ejay Hire

Starting with the Front-engined models introduced in the late 1990's, all of 
them.


Original Message Follows
From: [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]
To: "Cthulu, CCIE Candidate" [EMAIL PROTECTED],
[EMAIL PROTECTED]
Subject: Re: Help about a technical interview I had PLEASE!
Date: Fri, 15 Sep 2000 16:29:23 -0400

/
As a prior owner of a 1967 Volkswagen Beetle,I don't know of any Volkswagen
Beetle that had a radiatior.
\



Quoting "Cthulu, CCIE Candidate" [EMAIL PROTECTED]:

  There is also the possiblity that the CCIE was testing you, to see how 
you
  would handle one of your fellow workers spouting wrong information.
 
  I have sometimes deliberately and incorrectly stated some wrong 
information
  to find out exactly how much someone knew about something, and how they
  would handle it to hear someone else give out incorrect information.
 
  It 's like an experienced mechanic asking a new mechanic  "How often do 
you
  change the flush the radiator in a 1969 Volkswagen Beetle?"  as a way of
  determing what they know.
 
  Just a thought!
 
  Charles
 
  P.S.  You don't:  the 1969 beetle does not have a radiator!
 
 
  ""Leigh Anne Chisholm"" [EMAIL PROTECTED] wrote in message
  001c01c01f48$07320980$[EMAIL PROTECTED]">news:001c01c01f48$07320980$[EMAIL PROTECTED]...
   John/Sam
  
   I interviewed with an organization recently and completely blew one
  question.  I was asked what in an SMTP header will help troubleshoot 
email
  delivery problems.  Now I immediately start thinking about framing 
formats,
  and I don't know the frame format of an SMTP header.  I panic.  I say I
  don't know.
  
   I get home, I realize they weren't asking what field in a frame, but
  rather what information in the header that you can see as plain as day 
that
  gets tacked on to an email message.  I feel very silly...
  
   I emailed the hiring manager, and asked if this is what they were
  referring to, and provided him with a few examples of when I've used the
  SMTP header to troubleshoot delivery problems before.
  
   If I get the job, wonderful--they like my initiative following up.  If 
I
  don't... oh well.  I've been thinking about changing careers, because 
there
  are very few companies in my city that I would like to work for...
  
   John--what if the CCIE was trying to find out not just what technical
  knowledge you had, but how you handled difficult situations where two
  people
  who worked together thought differently about what was right.  Would you
  defer to the CCIE just because they're a CCIE or would you take 
initiative
  to find the correct answer?  Would you follow up?  Maybe... maybe not.
  It's
  hard to guess what's going on in the heads of interviewers.  I like to 
keep
  a positive attitude and not think the worst.  I'd HATE to think a CCIE
  wouldn't know simple network concepts.
  
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf 
Of
Sam Adams
Sent: Friday, September 15, 2000 10:57 AM
To: 'John Barnes'; [EMAIL PROTECTED]
Subject: RE: Help about a technical interview I had PLEASE!
   
   
John,
   
Besides the technical questions, how was the chemistry between you 
and
  the
interviewer?  I know I went through a recent interview and I left
wondering
if I wanted to work with the interviewer.  Needless to say, I
wasn't offered
a second interview.  Guess he felt the same.
   
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf 
Of
John Barnes
Sent: Thursday, September 14, 2000 3:09 PM
    To: [EMAIL PROTECTED]
Subject: Help about a technical interview I had PLEASE!
   
   
I had technical with a CCIE interview yesterday, and
I'm not really sure were to go with this.
   
He asked me a lot of pretty high level questions and
some not so high level, the problem is, I feel some of
the answers he wanted were wrong.  I'm going to post
the questions, the answers I gave, and the answers he
claimed to be correct.  If I'm wrong on these, I'd
like to know.  If I'm right, how would you deal with
this kind of thing?
   
1) What is the size of a token ring frame?
My answer: Token ring has a variable frame size.
His answer: 3 bytes..
   
Isn't that the size of the Token frame?
   
2) What the MTU of a token ring frame?  (Isn't this
about the same question as #1?)
My answer: slightly larger that 16K (I couldn't
remember the exact number)
His answer: about 4470 bytes .
   
Ahh... what?  He claimed I was thinking about
FDDI.g  Ah. Who's thinking about what?
   
3) What is the decision making process involved when a
packet enters a router?  What three criteria are used
to make this decision?
   My answer:  It depends. Is this the first
packet with this destination to arr

Re: Help about a technical interview I had PLEASE!

2000-09-15 Thread Jim Deane

John,

I'll leave the technical answers to others on the list who are more
qualified, but here's my $0.02 on your situation.  Even if you empirically
prove that you are/were right and he is/was wrong, you probably don't want
to work at this company or at least take this particular job.

I'm assuming that since this person was interviewing you, you would be
interacting with him in some way on the job.  And I am assuming that since
they had him interview you, he is most likely the "top dog" skills wise in
that group, as well as the favorite of the hiring manager.  So, even if you
were to go back, correct this misunderstanding, and get the job; if you had
to work with this guy every day, you would most likely be miserable in a
short amount of time.  If these questions are indicative of the skill set of
their best technical guy, based on the intelligence of your answers, you
would be frustrated quickly working with him.

When I interview with a company, I interview the people I meet as hard or
harder (in most cases) than they interview me.  Even if you are up to this
companies standards, they probably aren't up to yours, so I'd take a pass.
There are many more jobs out there that you are clearly qualified for.

Good Luck,
Jim


"John Barnes" [EMAIL PROTECTED] wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
 I had technical with a CCIE interview yesterday, and
 I'm not really sure were to go with this.

 He asked me a lot of pretty high level questions and
 some not so high level, the problem is, I feel some of
 the answers he wanted were wrong.  I'm going to post
 the questions, the answers I gave, and the answers he
 claimed to be correct.  If I'm wrong on these, I'd
 like to know.  If I'm right, how would you deal with
 this kind of thing?

 1) What is the size of a token ring frame?
 My answer: Token ring has a variable frame size.
 His answer: 3 bytes..

 Isn't that the size of the Token frame?

 2) What the MTU of a token ring frame?  (Isn't this
 about the same question as #1?)
 My answer: slightly larger that 16K (I couldn't
 remember the exact number)
 His answer: about 4470 bytes .

 Ahh... what?  He claimed I was thinking about
 FDDI.g  Ah. Who's thinking about what?

 3) What is the decision making process involved when a
 packet enters a router?  What three criteria are used
 to make this decision?
My answer:  It depends. Is this the first
 packet with this destination to arrive at this router?
  What switching mode is the router configured for.

His answer:  Forget about that stuff. how does
 it determine which route to use.

My answer:  longest match in the routing table

His answer:  What if multiple routes exist in
 the table.

My answer:  It depends.

Ok...I'm gonna cut to the chase. The answer he
 wanted was longest match, Administrative distance,
 then metric.  Ahh.. I'm pretty sure is wrong.   The
 router looks at AD and Metrics long before the packet
 enters the router.  The router uses AD and metric to
 populate the routing table, and then longest match
 from the routing table to make the decision once the
 packet actually enters the router.  Comparing AD and
 metric on every known route every time would place
 unnecessary burden on the CPU.  Compare it once, make
 the decision, and enter it in the RIT.  Even in the
 case of IGRP/EIGRP with variance, the next eligible
 route is determined before the packet enters the
 router.

   Maybe I should have picked up on this stuff when
 the recruiter asked me with BGP was a DV or LS based
 routing protocol.  My answer. ahh.neither, it's path
 vector.

 I'm basically sending this out to get thoughts, and
 hopefully Howard, Priscilla or someone can tell me
 wether I'm off technically or not.


 THANKS!

 -john


 __
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RE: Help about a technical interview I had PLEASE!

2000-09-15 Thread Sam Adams

John,

Besides the technical questions, how was the chemistry between you and the
interviewer?  I know I went through a recent interview and I left wondering
if I wanted to work with the interviewer.  Needless to say, I wasn't offered
a second interview.  Guess he felt the same.

-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
John Barnes
Sent: Thursday, September 14, 2000 3:09 PM
To: [EMAIL PROTECTED]
Subject: Help about a technical interview I had PLEASE!


I had technical with a CCIE interview yesterday, and
I’m not really sure were to go with this.

He asked me a lot of pretty high level questions and
some not so high level, the problem is, I feel some of
the answers he wanted were wrong.  I’m going to post
the questions, the answers I gave, and the answers he
claimed to be correct.  If I’m wrong on these, I’d
like to know.  If I’m right, how would you deal with
this kind of thing?

1)  What is the size of a token ring frame?
My answer: Token ring has a variable frame size.
His answer: 3 bytes..

Isn’t that the size of the Token frame?

2)  What the MTU of a token ring frame?  (Isn’t this
about the same question as #1?)
My answer: slightly larger that 16K (I couldn’t
remember the exact number)
His answer: about 4470 bytes .

Ahh….. what?  He claimed I was thinking about
FDDI…g  Ah… Who’s thinking about what?

3)  What is the decision making process involved when a
packet enters a router?  What three criteria are used
to make this decision?
   My answer:  It depends. Is this the first
packet with this destination to arrive at this router?
 What switching mode is the router configured for.

   His answer:  Forget about that stuff… how does
it determine which route to use.

   My answer:  longest match in the routing table

   His answer:  What if multiple routes exist in
the table.

   My answer:  It depends.

   Ok…..I’m gonna cut to the chase… The answer he
wanted was longest match, Administrative distance,
then metric.  Ahh…. I’m pretty sure is wrong.   The
router looks at AD and Metrics long before the packet
enters the router.  The router uses AD and metric to
populate the routing table, and then longest match
from the routing table to make the decision once the
packet actually enters the router.  Comparing AD and
metric on every known route every time would place
unnecessary burden on the CPU.  Compare it once, make
the decision, and enter it in the RIT.  Even in the
case of IGRP/EIGRP with variance, the next eligible
route is determined before the packet enters the
router.

  Maybe I should have picked up on this stuff when
the recruiter asked me with BGP was a DV or LS based
routing protocol.  My answer… ahh…neither, it’s path
vector.

I’m basically sending this out to get thoughts, and
hopefully Howard, Priscilla or someone can tell me
wether I’m off technically or not.


THANKS!

-john


__
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Yahoo! Mail - Free email you can access from anywhere!
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_
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RE: Help about a technical interview I had PLEASE!

2000-09-15 Thread Leigh Anne Chisholm

John/Sam

I interviewed with an organization recently and completely blew one question.  I was 
asked what in an SMTP header will help troubleshoot email delivery problems.  Now I 
immediately start thinking about framing formats, and I don't know the frame format of 
an SMTP header.  I panic.  I say I don't know.

I get home, I realize they weren't asking what field in a frame, but rather what 
information in the header that you can see as plain as day that gets tacked on to an 
email message.  I feel very silly...

I emailed the hiring manager, and asked if this is what they were referring to, and 
provided him with a few examples of when I've used the SMTP header to troubleshoot 
delivery problems before.  

If I get the job, wonderful--they like my initiative following up.  If I don't... oh 
well.  I've been thinking about changing careers, because there are  very few 
companies in my city that I would like to work for...

John--what if the CCIE was trying to find out not just what technical knowledge you 
had, but how you handled difficult situations  where two people who worked together 
thought differently about what was right.  Would you defer to the CCIE just because 
they're a CCIE or would you take initiative to find the correct answer?  Would you 
follow up?  Maybe... maybe not.  It's hard to guess what's going on in the heads of 
interviewers.  I like to keep a positive attitude and not think the worst.  I'd HATE 
to think a CCIE wouldn't know simple network concepts.

 -Original Message-
 From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
 Sam Adams
 Sent: Friday, September 15, 2000 10:57 AM
 To: 'John Barnes'; [EMAIL PROTECTED]
 Subject: RE: Help about a technical interview I had PLEASE!
 
 
 John,
 
 Besides the technical questions, how was the chemistry between you and the
 interviewer?  I know I went through a recent interview and I left 
 wondering
 if I wanted to work with the interviewer.  Needless to say, I 
 wasn't offered
 a second interview.  Guess he felt the same.
 
 -Original Message-
 From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
 John Barnes
 Sent: Thursday, September 14, 2000 3:09 PM
 To: [EMAIL PROTECTED]
 Subject: Help about a technical interview I had PLEASE!
 
 
 I had technical with a CCIE interview yesterday, and
 I’m not really sure were to go with this.
 
 He asked me a lot of pretty high level questions and
 some not so high level, the problem is, I feel some of
 the answers he wanted were wrong.  I’m going to post
 the questions, the answers I gave, and the answers he
 claimed to be correct.  If I’m wrong on these, I’d
 like to know.  If I’m right, how would you deal with
 this kind of thing?
 
 1)What is the size of a token ring frame?
 My answer: Token ring has a variable frame size.
 His answer: 3 bytes..
 
 Isn’t that the size of the Token frame?
 
 2)What the MTU of a token ring frame?  (Isn’t this
 about the same question as #1?)
 My answer: slightly larger that 16K (I couldn’t
 remember the exact number)
 His answer: about 4470 bytes .
 
 Ahh….. what?  He claimed I was thinking about
 FDDI…g  Ah… Who’s thinking about what?
 
 3)What is the decision making process involved when a
 packet enters a router?  What three criteria are used
 to make this decision?
My answer:  It depends. Is this the first
 packet with this destination to arrive at this router?
  What switching mode is the router configured for.
 
His answer:  Forget about that stuff… how does
 it determine which route to use.
 
My answer:  longest match in the routing table
 
His answer:  What if multiple routes exist in
 the table.
 
My answer:  It depends.
 
Ok…..I’m gonna cut to the chase… The answer he
 wanted was longest match, Administrative distance,
 then metric.  Ahh…. I’m pretty sure is wrong.   The
 router looks at AD and Metrics long before the packet
 enters the router.  The router uses AD and metric to
 populate the routing table, and then longest match
 from the routing table to make the decision once the
 packet actually enters the router.  Comparing AD and
 metric on every known route every time would place
 unnecessary burden on the CPU.  Compare it once, make
 the decision, and enter it in the RIT.  Even in the
 case of IGRP/EIGRP with variance, the next eligible
 route is determined before the packet enters the
 router.
 
   Maybe I should have picked up on this stuff when
 the recruiter asked me with BGP was a DV or LS based
 routing protocol.  My answer… ahh…neither, it’s path
 vector.
 
 I’m basically sending this out to get thoughts, and
 hopefully Howard, Priscilla or someone can tell me
 wether I’m off technically or not.
 
 
 THANKS!
 
 -john
 
 
 __
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 Yahoo! Mail - Free email you can access from anywhere!
 http://mail.yahoo.com/
 
 **NOTE: New CCNA/CCDA List has been formed. For more

Re: Help about a technical interview I had PLEASE!

2000-09-15 Thread Cthulu, CCIE Candidate

There is also the possiblity that the CCIE was testing you, to see how you
would handle one of your fellow workers spouting wrong information.

I have sometimes deliberately and incorrectly stated some wrong information
to find out exactly how much someone knew about something, and how they
would handle it to hear someone else give out incorrect information.

It 's like an experienced mechanic asking a new mechanic  "How often do you
change the flush the radiator in a 1969 Volkswagen Beetle?"  as a way of
determing what they know.

Just a thought!

Charles

P.S.  You don't:  the 1969 beetle does not have a radiator!


""Leigh Anne Chisholm"" [EMAIL PROTECTED] wrote in message
001c01c01f48$07320980$[EMAIL PROTECTED]">news:001c01c01f48$07320980$[EMAIL PROTECTED]...
 John/Sam

 I interviewed with an organization recently and completely blew one
question.  I was asked what in an SMTP header will help troubleshoot email
delivery problems.  Now I immediately start thinking about framing formats,
and I don't know the frame format of an SMTP header.  I panic.  I say I
don't know.

 I get home, I realize they weren't asking what field in a frame, but
rather what information in the header that you can see as plain as day that
gets tacked on to an email message.  I feel very silly...

 I emailed the hiring manager, and asked if this is what they were
referring to, and provided him with a few examples of when I've used the
SMTP header to troubleshoot delivery problems before.

 If I get the job, wonderful--they like my initiative following up.  If I
don't... oh well.  I've been thinking about changing careers, because there
are very few companies in my city that I would like to work for...

 John--what if the CCIE was trying to find out not just what technical
knowledge you had, but how you handled difficult situations where two people
who worked together thought differently about what was right.  Would you
defer to the CCIE just because they're a CCIE or would you take initiative
to find the correct answer?  Would you follow up?  Maybe... maybe not.  It's
hard to guess what's going on in the heads of interviewers.  I like to keep
a positive attitude and not think the worst.  I'd HATE to think a CCIE
wouldn't know simple network concepts.

  -Original Message-
  From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
  Sam Adams
  Sent: Friday, September 15, 2000 10:57 AM
  To: 'John Barnes'; [EMAIL PROTECTED]
  Subject: RE: Help about a technical interview I had PLEASE!
 
 
  John,
 
  Besides the technical questions, how was the chemistry between you and
the
  interviewer?  I know I went through a recent interview and I left
  wondering
  if I wanted to work with the interviewer.  Needless to say, I
  wasn't offered
  a second interview.  Guess he felt the same.
 
  -Original Message-
  From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
  John Barnes
  Sent: Thursday, September 14, 2000 3:09 PM
  To: [EMAIL PROTECTED]
  Subject: Help about a technical interview I had PLEASE!
 
 
  I had technical with a CCIE interview yesterday, and
  I'm not really sure were to go with this.
 
  He asked me a lot of pretty high level questions and
  some not so high level, the problem is, I feel some of
  the answers he wanted were wrong.  I'm going to post
  the questions, the answers I gave, and the answers he
  claimed to be correct.  If I'm wrong on these, I'd
  like to know.  If I'm right, how would you deal with
  this kind of thing?
 
  1) What is the size of a token ring frame?
  My answer: Token ring has a variable frame size.
  His answer: 3 bytes..
 
  Isn't that the size of the Token frame?
 
  2) What the MTU of a token ring frame?  (Isn't this
  about the same question as #1?)
  My answer: slightly larger that 16K (I couldn't
  remember the exact number)
  His answer: about 4470 bytes .
 
  Ahh... what?  He claimed I was thinking about
  FDDI.g  Ah. Who's thinking about what?
 
  3) What is the decision making process involved when a
  packet enters a router?  What three criteria are used
  to make this decision?
 My answer:  It depends. Is this the first
  packet with this destination to arrive at this router?
   What switching mode is the router configured for.
 
 His answer:  Forget about that stuff. how does
  it determine which route to use.
 
 My answer:  longest match in the routing table
 
 His answer:  What if multiple routes exist in
  the table.
 
 My answer:  It depends.
 
 Ok...I'm gonna cut to the chase. The answer he
  wanted was longest match, Administrative distance,
  then metric.  Ahh.. I'm pretty sure is wrong.   The
  router looks at AD and Metrics long before the packet
  enters the router.  The router uses AD and metric to
  populate the routing table, and then longest match
  from the routing table to make the decision once the
  packet actually enters the router.  Co

Re: Help about a technical interview I had PLEASE!

2000-09-15 Thread dsilva

/
As a prior owner of a 1967 Volkswagen Beetle,I don't know of any Volkswagen 
Beetle that had a radiatior.
\



Quoting "Cthulu, CCIE Candidate" [EMAIL PROTECTED]:

 There is also the possiblity that the CCIE was testing you, to see how you
 would handle one of your fellow workers spouting wrong information.
 
 I have sometimes deliberately and incorrectly stated some wrong information
 to find out exactly how much someone knew about something, and how they
 would handle it to hear someone else give out incorrect information.
 
 It 's like an experienced mechanic asking a new mechanic  "How often do you
 change the flush the radiator in a 1969 Volkswagen Beetle?"  as a way of
 determing what they know.
 
 Just a thought!
 
 Charles
 
 P.S.  You don't:  the 1969 beetle does not have a radiator!
 
 
 ""Leigh Anne Chisholm"" [EMAIL PROTECTED] wrote in message
 001c01c01f48$07320980$[EMAIL PROTECTED]">news:001c01c01f48$07320980$[EMAIL PROTECTED]...
  John/Sam
 
  I interviewed with an organization recently and completely blew one
 question.  I was asked what in an SMTP header will help troubleshoot email
 delivery problems.  Now I immediately start thinking about framing formats,
 and I don't know the frame format of an SMTP header.  I panic.  I say I
 don't know.
 
  I get home, I realize they weren't asking what field in a frame, but
 rather what information in the header that you can see as plain as day that
 gets tacked on to an email message.  I feel very silly...
 
  I emailed the hiring manager, and asked if this is what they were
 referring to, and provided him with a few examples of when I've used the
 SMTP header to troubleshoot delivery problems before.
 
  If I get the job, wonderful--they like my initiative following up.  If I
 don't... oh well.  I've been thinking about changing careers, because there
 are very few companies in my city that I would like to work for...
 
  John--what if the CCIE was trying to find out not just what technical
 knowledge you had, but how you handled difficult situations where two
 people
 who worked together thought differently about what was right.  Would you
 defer to the CCIE just because they're a CCIE or would you take initiative
 to find the correct answer?  Would you follow up?  Maybe... maybe not. 
 It's
 hard to guess what's going on in the heads of interviewers.  I like to keep
 a positive attitude and not think the worst.  I'd HATE to think a CCIE
 wouldn't know simple network concepts.
 
   -Original Message-
   From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
   Sam Adams
   Sent: Friday, September 15, 2000 10:57 AM
   To: 'John Barnes'; [EMAIL PROTECTED]
   Subject: RE: Help about a technical interview I had PLEASE!
  
  
   John,
  
   Besides the technical questions, how was the chemistry between you and
 the
   interviewer?  I know I went through a recent interview and I left
   wondering
   if I wanted to work with the interviewer.  Needless to say, I
   wasn't offered
   a second interview.  Guess he felt the same.
  
   -Original Message-
   From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
   John Barnes
   Sent: Thursday, September 14, 2000 3:09 PM
   To: [EMAIL PROTECTED]
   Subject: Help about a technical interview I had PLEASE!
  
  
   I had technical with a CCIE interview yesterday, and
   I'm not really sure were to go with this.
  
   He asked me a lot of pretty high level questions and
   some not so high level, the problem is, I feel some of
   the answers he wanted were wrong.  I'm going to post
   the questions, the answers I gave, and the answers he
   claimed to be correct.  If I'm wrong on these, I'd
   like to know.  If I'm right, how would you deal with
   this kind of thing?
  
   1) What is the size of a token ring frame?
   My answer: Token ring has a variable frame size.
   His answer: 3 bytes..
  
   Isn't that the size of the Token frame?
  
   2) What the MTU of a token ring frame?  (Isn't this
   about the same question as #1?)
   My answer: slightly larger that 16K (I couldn't
   remember the exact number)
   His answer: about 4470 bytes .
  
   Ahh... what?  He claimed I was thinking about
   FDDI.g  Ah. Who's thinking about what?
  
   3) What is the decision making process involved when a
   packet enters a router?  What three criteria are used
   to make this decision?
  My answer:  It depends. Is this the first
   packet with this destination to arrive at this router?
What switching mode is the router configured for.
  
  His answer:  Forget about that stuff. how does
   it determine which route to use.
  
  My answer:  longest match in the routing table
  
  His answer:  What if multiple routes exist in
   the table.
  
  My answer:  It depends.
  
  Ok...I'm gonna cut to the chase. The answer he
   wanted was longest match, Administrative distance,
   then metric. 

Help about a technical interview I had PLEASE!

2000-09-14 Thread John Barnes

I had technical with a CCIE interview yesterday, and
I’m not really sure were to go with this.

He asked me a lot of pretty high level questions and
some not so high level, the problem is, I feel some of
the answers he wanted were wrong.  I’m going to post
the questions, the answers I gave, and the answers he
claimed to be correct.  If I’m wrong on these, I’d
like to know.  If I’m right, how would you deal with
this kind of thing?  

1)  What is the size of a token ring frame?
My answer: Token ring has a variable frame size. 
His answer: 3 bytes..  

Isn’t that the size of the Token frame?

2)  What the MTU of a token ring frame?  (Isn’t this
about the same question as #1?)
My answer: slightly larger that 16K (I couldn’t
remember the exact number)
His answer: about 4470 bytes .

Ahh….. what?  He claimed I was thinking about
FDDI…g  Ah… Who’s thinking about what?

3)  What is the decision making process involved when a
packet enters a router?  What three criteria are used
to make this decision?
   My answer:  It depends. Is this the first
packet with this destination to arrive at this router?
 What switching mode is the router configured for.

   His answer:  Forget about that stuff… how does
it determine which route to use.

   My answer:  longest match in the routing table

   His answer:  What if multiple routes exist in
the table.

   My answer:  It depends.

   Ok…..I’m gonna cut to the chase… The answer he
wanted was longest match, Administrative distance,
then metric.  Ahh…. I’m pretty sure is wrong.   The
router looks at AD and Metrics long before the packet
enters the router.  The router uses AD and metric to
populate the routing table, and then longest match
from the routing table to make the decision once the
packet actually enters the router.  Comparing AD and
metric on every known route every time would place
unnecessary burden on the CPU.  Compare it once, make
the decision, and enter it in the RIT.  Even in the
case of IGRP/EIGRP with variance, the next eligible
route is determined before the packet enters the
router.  

  Maybe I should have picked up on this stuff when
the recruiter asked me with BGP was a DV or LS based
routing protocol.  My answer… ahh…neither, it’s path
vector.

I’m basically sending this out to get thoughts, and
hopefully Howard, Priscilla or someone can tell me
wether I’m off technically or not.


THANKS!

-john


__
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Re: Help about a technical interview I had PLEASE!

2000-09-14 Thread Kristopher B. Climie

1.  The question is ambiguous.  If it is asking what is the Token Frame
size, the answer is 3-bytes.  (Starting Delimiter, 1-byte, Access Control,
1-byte, and End Delimeter, 1-byte).  You are right in your answer, the Frame
size in TR is variable, I would have answered it the same way.

2.  The average MTU for Token is 4,464, however, the data portion can
contain up to 17,800 bytes, for a MAXIMUM MTU (sorry for the redundant
redundancy) is 17,997.  Cisco supports MTUs of 68-17,997 bytes.  The MTU for
FDDI is 4,500.

3. Routing decision:
1) Most specific route
2) Administrative Distance

   For instance, you might have a Routing table that says:

Gateway of last resort not set

R39.0.0.0/8 [120/1] via 172.16.1.20, FastEthernet0/0
R39.0.1.0/24 [120/1] via 172.16.1.19, FastEthernet0/0
C   172.16.0.0 is directly connected, FastEthernet0/0

If you send a packet to 39.0.1.33, it is going to use 172.16.1.19, and not
172.16.1.20 because it is the most specific route.  If the route through
172.16.1.19 was not in there, and there was both an EIGRP learned route, and
the RIP route shown to 39.0.1.0, the EIGRP route would be used.  Why?
Because its route has a lower Administrative Distance.

Remember, the router only places multiple equal-cost routes in the table, or
the single route with the lowest Administrative Distance.  Metrics are only
used in path selection within  a specific routing process, not for final
path selection.  That is why we all had to learn iBgp = 200, RIP=120,
OSPF=110, IGRP=100, EIGRP=90, eBgp=20, etc.  Each routing process will
present its BEST route (based on the metrics available to it) for final path
selection.  That final path is chosen from the type of route it is.

K

-
Kristopher B. Climie, CCNP, CCDP

"John Barnes" [EMAIL PROTECTED] wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
 I had technical with a CCIE interview yesterday, and
 I'm not really sure were to go with this.

 He asked me a lot of pretty high level questions and
 some not so high level, the problem is, I feel some of
 the answers he wanted were wrong.  I'm going to post
 the questions, the answers I gave, and the answers he
 claimed to be correct.  If I'm wrong on these, I'd
 like to know.  If I'm right, how would you deal with
 this kind of thing?

 1) What is the size of a token ring frame?
 My answer: Token ring has a variable frame size.
 His answer: 3 bytes..

 Isn't that the size of the Token frame?

 2) What the MTU of a token ring frame?  (Isn't this
 about the same question as #1?)
 My answer: slightly larger that 16K (I couldn't
 remember the exact number)
 His answer: about 4470 bytes .

 Ahh... what?  He claimed I was thinking about
 FDDI.g  Ah. Who's thinking about what?

 3) What is the decision making process involved when a
 packet enters a router?  What three criteria are used
 to make this decision?
My answer:  It depends. Is this the first
 packet with this destination to arrive at this router?
  What switching mode is the router configured for.

His answer:  Forget about that stuff. how does
 it determine which route to use.

My answer:  longest match in the routing table

His answer:  What if multiple routes exist in
 the table.

My answer:  It depends.

Ok...I'm gonna cut to the chase. The answer he
 wanted was longest match, Administrative distance,
 then metric.  Ahh.. I'm pretty sure is wrong.   The
 router looks at AD and Metrics long before the packet
 enters the router.  The router uses AD and metric to
 populate the routing table, and then longest match
 from the routing table to make the decision once the
 packet actually enters the router.  Comparing AD and
 metric on every known route every time would place
 unnecessary burden on the CPU.  Compare it once, make
 the decision, and enter it in the RIT.  Even in the
 case of IGRP/EIGRP with variance, the next eligible
 route is determined before the packet enters the
 router.

   Maybe I should have picked up on this stuff when
 the recruiter asked me with BGP was a DV or LS based
 routing protocol.  My answer. ahh.neither, it's path
 vector.

 I'm basically sending this out to get thoughts, and
 hopefully Howard, Priscilla or someone can tell me
 wether I'm off technically or not.


 THANKS!

 -john


 __
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 Yahoo! Mail - Free email you can access from anywhere!
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 **NOTE: New CCNA/CCDA List has been formed. For more information go to
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Re: Help about a technical interview I had PLEASE!

2000-09-14 Thread Priscilla Oppenheimer

Don't go work for that guy! ;-) See more below:

At 03:09 PM 9/14/00, John Barnes wrote:
I had technical with a CCIE interview yesterday, and

snip


1)  What is the size of a token ring frame?
My answer: Token ring has a variable frame size.
His answer: 3 bytes..

Isn’t that the size of the Token frame?

That would be the token.


2)  What the MTU of a token ring frame?  (Isn’t this
about the same question as #1?)
My answer: slightly larger that 16K (I couldn’t
remember the exact number)
His answer: about 4470 bytes .

18K on 16-Mbps Token Ring. 4470 bytes on 4-Mbps Token Ring AND FDDI. 
(Technically, both depend on the token-holding timer, which has a default, 
non-configurable value for Token Ring and is configurable for FDDI. But the 
max frame is based on the max the timer could be set to and a network of 
maximum size.)


Ahh….. what?  He claimed I was thinking about
FDDI…g  Ah… Who’s thinking about what?

3)  What is the decision making process involved when a
packet enters a router?  What three criteria are used
to make this decision?
My answer:  It depends. Is this the first
packet with this destination to arrive at this router?
  What switching mode is the router configured for.

Excellent answer.


His answer:  Forget about that stuff… how does
it determine which route to use.

My answer:  longest match in the routing table

His answer:  What if multiple routes exist in
the table.

My answer:  It depends.

Ok…..I’m gonna cut to the chase… The answer he
wanted was longest match, Administrative distance,
then metric.  Ahh…. I’m pretty sure is wrong.   The
router looks at AD and Metrics long before the packet
enters the router.  The router uses AD and metric to
populate the routing table, and then longest match
from the routing table to make the decision once the
packet actually enters the router.  Comparing AD and
metric on every known route every time would place
unnecessary burden on the CPU.  Compare it once, make
the decision, and enter it in the RIT.  Even in the
case of IGRP/EIGRP with variance, the next eligible
route is determined before the packet enters the
router.

Well if the router learns a more specific route from a routing protocol, 
that replaces a less specific. To quote Howard, "A summary route from the 
latest, greatest OSPF implementation will be overridden by a RIP subnet 
route from an old UNIX box."

Then AD comes into play. Metrics are used as a tie-breaker for routes 
learned from the same dynamic routing protocol (i.e., breaking ties between 
routes of the same administrative distance).

To move onto frame forwarding, when a route is looked up in the routing 
table, the main criterion is most specific prefix match. For example, the 
most specific possible match is a host route or /32 prefix, while the least 
specific possible match is the default route of 0.0.0.0/0.

See Howard's paper on Routing Principles at www.certificationzone.com for a 
great explanation of how all this works. He's the expert!


   Maybe I should have picked up on this stuff when
the recruiter asked me with BGP was a DV or LS based
routing protocol.  My answer… ahh…neither, it’s path
vector.

Reminds me of the time years ago when the technical recruiter asked me the 
difference between asynchronous and BISYNC. (He meant to say asynch VS 
synch and had actually never heard of BISYNC. He didn't understand my 
answer and didn't hire me. Just as well, I think!)

Priscilla


I’m basically sending this out to get thoughts, and
hopefully Howard, Priscilla or someone can tell me
wether I’m off technically or not.


THANKS!

-john


__
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Re: Help about a technical interview I had PLEASE!

2000-09-14 Thread Bob Karen Timmons

See Inline:

 1) What is the size of a token ring frame?
 My answer: Token ring has a variable frame size. 
 His answer: 3 bytes..  
 
 Isn't that the size of the Token frame?

There are 3 Token Frame Fields
 - Start Delimiter
 - Access-Control Byte
 - End Delimiter

http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/tokenrng.htm

(Watch the word wrap)


 
 2) What the MTU of a token ring frame?  (Isn't this
 about the same question as #1?)
 My answer: slightly larger that 16K (I couldn't
 remember the exact number)
 His answer: about 4470 bytes .
 
 Ahh... what?  He claimed I was thinking about
 FDDI.g  Ah. Who's thinking about what?

That is variable, but check here:
http://www.cisco.com/warp/public/482/11.html


 
 3) What is the decision making process involved when a
 packet enters a router?  What three criteria are used
 to make this decision?
My answer:  It depends. Is this the first
 packet with this destination to arrive at this router?
  What switching mode is the router configured for.
 
His answer:  Forget about that stuff. how does
 it determine which route to use.

Hang on here... Did we go from 1 question (what is the decision
making process...) to another question (how does it determine
which route to use)?

 
My answer:  longest match in the routing table

Good answer

 
His answer:  What if multiple routes exist in
 the table.

Ouch

 
My answer:  It depends.
 
Ok...I'm gonna cut to the chase. The answer he
 wanted was longest match, Administrative distance,
 then metric.  Ahh.. I'm pretty sure is wrong.   The
 router looks at AD and Metrics long before the packet
 enters the router.  The router uses AD and metric to
 populate the routing table, and then longest match
 from the routing table to make the decision once the
 packet actually enters the router.  Comparing AD and
 metric on every known route every time would place
 unnecessary burden on the CPU.  Compare it once, make
 the decision, and enter it in the RIT.  Even in the
 case of IGRP/EIGRP with variance, the next eligible
 route is determined before the packet enters the
 router.  
 

Well, that's kind of a crappy question, IMHO.  Maybe he was just
trying to get an idea of your thought process.

Consider it a learning experience.  

btw.  How much T/R does this guy use/run into?  He sounds like
the CCIE written.

Bob

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Re: Help about a technical interview I had PLEASE!

2000-09-14 Thread Erick B.

Comments inline.. stuff snipped.

--- John Barnes [EMAIL PROTECTED] wrote:

 2)What the MTU of a token ring frame? 
 His answer: about 4470 bytes .

He's right... MTU is Max Transfer Unit which can be
adjusted but the default is around 4470 for Token Ring
and Ethernet is 1500 (Cisco default), 1600 (BayRS
default). Ethernet frame is 1518 bytes. 

 Ahh….. what?  He claimed I was thinking about
 FDDI…g  Ah… Who’s thinking about what?

FDDI is similar to Token Ring. Don't have the #s off
the top of my head at moment (been a long day/week).

 3)What is the decision making process involved when
 a
 packet enters a router?  What three criteria are
 used
 to make this decision?
My answer:  It depends. Is this the first
 packet with this destination to arrive at this
 router?
  What switching mode is the router configured for.

Switching mode is router-specific and part of the
forwarding method... so... I wouldn't even think about
switching/forwarding methods until after the stuff
he's after is answered , then maybe mention it as a
plus. 

One of the three things looked at is the destination
address, else it doesn't know where to forward it.

E

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Re: Help about a technical interview I had PLEASE!

2000-09-14 Thread Kristopher B. Climie

I seem to be having a problem getting my posts to go through.  My apologies
if this shows up multiple times.
K
---

1.  The question is ambiguous.  If it is asking what is the Token Frame
size, the answer is 3-bytes.  (Starting Delimiter, 1-byte, Access Control,
1-byte, and End Delimeter, 1-byte).  You are right in your answer, the Frame
size in TR is variable, I would have answered it the same way.

2.  The average MTU for Token is 4,464, however, the data portion can
contain up to 17,800 bytes, for a MAXIMUM MTU (sorry for the redundant
redundancy) is 17,997.  Cisco supports MTUs of 68-17,997 bytes.  The MTU for
FDDI is 4,500.

3. Routing decision:
1) Most specific route
2) Administrative Distance

   For instance, you might have a Routing table that says:

Gateway of last resort not set

R39.0.0.0/8 [120/1] via 172.16.1.20, FastEthernet0/0
R39.0.1.0/24 [120/1] via 172.16.1.19, FastEthernet0/0
C   172.16.0.0 is directly connected, FastEthernet0/0

If you send a packet to 39.0.1.33, it is going to use 172.16.1.19, and not
172.16.1.20 because it is the most specific route.  If the route through
172.16.1.19 was not in there, and there was both an EIGRP learned route, and
the RIP route shown to 39.0.1.0, the EIGRP route would be used.  Why?
Because its route has a lower Administrative Distance.

Remember, the router only places multiple equal-cost routes in the table, or
the single route with the lowest Administrative Distance.  Metrics are only
used in path selection within  a specific routing process, not for final
path selection.  That is why we all had to learn iBgp = 200, RIP=120,
OSPF=110, IGRP=100, EIGRP=90, eBgp=20, etc.  Each routing process will
present its BEST route (based on the metrics available to it) for final path
selection.  That final path is chosen from the type of route it is.

K

-
Kristopher B. Climie, CCNP, CCDP

"John Barnes" [EMAIL PROTECTED] wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
 I had technical with a CCIE interview yesterday, and
 I'm not really sure were to go with this.

 He asked me a lot of pretty high level questions and
 some not so high level, the problem is, I feel some of
 the answers he wanted were wrong.  I'm going to post
 the questions, the answers I gave, and the answers he
 claimed to be correct.  If I'm wrong on these, I'd
 like to know.  If I'm right, how would you deal with
 this kind of thing?

 1) What is the size of a token ring frame?
 My answer: Token ring has a variable frame size.
 His answer: 3 bytes..

 Isn't that the size of the Token frame?

 2) What the MTU of a token ring frame?  (Isn't this
 about the same question as #1?)
 My answer: slightly larger that 16K (I couldn't
 remember the exact number)
 His answer: about 4470 bytes .

 Ahh... what?  He claimed I was thinking about
 FDDI.g  Ah. Who's thinking about what?

 3) What is the decision making process involved when a
 packet enters a router?  What three criteria are used
 to make this decision?
My answer:  It depends. Is this the first
 packet with this destination to arrive at this router?
  What switching mode is the router configured for.

His answer:  Forget about that stuff. how does
 it determine which route to use.

My answer:  longest match in the routing table

His answer:  What if multiple routes exist in
 the table.

My answer:  It depends.

Ok...I'm gonna cut to the chase. The answer he
 wanted was longest match, Administrative distance,
 then metric.  Ahh.. I'm pretty sure is wrong.   The
 router looks at AD and Metrics long before the packet
 enters the router.  The router uses AD and metric to
 populate the routing table, and then longest match
 from the routing table to make the decision once the
 packet actually enters the router.  Comparing AD and
 metric on every known route every time would place
 unnecessary burden on the CPU.  Compare it once, make
 the decision, and enter it in the RIT.  Even in the
 case of IGRP/EIGRP with variance, the next eligible
 route is determined before the packet enters the
 router.

   Maybe I should have picked up on this stuff when
 the recruiter asked me with BGP was a DV or LS based
 routing protocol.  My answer. ahh.neither, it's path
 vector.

 I'm basically sending this out to get thoughts, and
 hopefully Howard, Priscilla or someone can tell me
 wether I'm off technically or not.


 THANKS!

 -john


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