RE: ccna companion question [7:17648]
Have you tried it ? what happens? By default the Cisco IOS rejects an attempt to configure an all zero's subnet as an invalid address/mask pair even if an ip classless pair even if a classless protocol is running -Original Message- From: Teresa Presutto [mailto:[EMAIL PROTECTED]] Sent: 29 August 2001 11:36 To: [EMAIL PROTECTED] Subject: Re: ccna companion question [7:17648] "Tell a woman there are 300 billion stars in the universe and she'll believe you. Tell her a bench has wet paint on it and she'll have to touch to be sure": Ok for the ip subnet-zero concept, but I still do not understand the answer, this morning I'm more stupid than usual. The first anwer is correct. I know. "The first valid subnet would be 156.100.0.0-156.100.15.255 with a base address of 156.100.0.0. If a configure 156.100.11.37 255.255.240.0 without ip subnet-zero what does it happen? Thanks a million in advance, Teresa - Original Message - From: Christopher Supino To: Teresa Presutto ; Cisco Sent: Wednesday, August 29, 2001 11:49 AM Subject: RE: ccna companion question [7:17648] The first answer would be correct, because it would require IP subnet-zero to be running. This command allows the router to use the zero subnet (subnet with a base address of 0.0) to be used as a valid subnet. In this example, you have 4 bits of subnetting, which allows for 16 sub-networks(theoretically if the .255 and .0 subnets are valid, but then a again, thats what we are discussing) with 4094 valid hosts per subnet. The first valid subnet would be 156.100.0.0-156.100.15.255 with a base address of 156.100.0.0. Some older network equipment doesn't allow for the use of the zero-subnet, as it is seen as a base(even though it isn't . 0s in the host=base address) or even stranger a brodcast(some older gear from other manufacturers used all 0s as a broadcast, rather than all 1s. Just remember, we are talking about a zero in the network portion, not the host portion. Hope this explanation helps. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Teresa Presutto Sent: Wednesday, August 29, 2001 5:01 AM To: [EMAIL PROTECTED] Subject: ccna companion question [7:17648] CNNA Companion question (obviously I read the answer and I know the command , but I would like to know why...) Which of the following addresses would be require the use of ip subnet-zero command? 156.100.11.37 255.255.240.0 131.64.16.133 255.255.255.128 192.168.36.10 255.255.255.0 205.100.16.3 255.255.255.0 Ciao e grazie, Teresa Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=17656&t=17648 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ccna companion question [7:17648]
"Tell a woman there are 300 billion stars in the universe and she'll believe
you. Tell her a bench has wet paint on it and she'll have to touch to be
sure":
Ok for the ip subnet-zero concept, but I still do not understand the
answer,
this morning I'm more stupid than usual.
The first anwer is correct. I know.
"The first valid subnet would be 156.100.0.0-156.100.15.255 with a base
address
of 156.100.0.0.
If a configure 156.100.11.37 255.255.240.0 without ip subnet-zero what
does
it happen?
Thanks a million in advance,
Teresa
- Original Message -
From: Christopher Supino
To: Teresa Presutto ; Cisco
Sent: Wednesday, August 29, 2001 11:49 AM
Subject: RE: ccna companion question [7:17648]
The first answer would be correct, because it would require IP
subnet-zero
to be running. This command allows the router to use the zero subnet
(subnet
with a base address of 0.0) to be used as a valid subnet. In this
example,
you have 4 bits of subnetting, which allows for 16
sub-networks(theoretically if the .255 and .0 subnets are valid, but then
a
again, thats what we are discussing) with 4094 valid hosts per subnet.
The
first valid subnet would be 156.100.0.0-156.100.15.255 with a base
address
of 156.100.0.0. Some older network equipment doesn't allow for the use of
the zero-subnet, as it is seen as a base(even though it isn't . 0s in the
host=base address) or even stranger a brodcast(some older gear from other
manufacturers used all 0s as a broadcast, rather than all 1s. Just
remember,
we are talking about a zero in the network portion, not the host portion.
Hope this explanation helps.
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Teresa Presutto
Sent: Wednesday, August 29, 2001 5:01 AM
To: [EMAIL PROTECTED]
Subject: ccna companion question [7:17648]
CNNA Companion question (obviously I read the answer and I know the
command
,
but I would like to know why...)
Which of the following addresses would be require the use of ip
subnet-zero
command?
156.100.11.37 255.255.240.0
131.64.16.133 255.255.255.128
192.168.36.10 255.255.255.0
205.100.16.3 255.255.255.0
Ciao e grazie,
Teresa
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=17655&t=17648
--
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RE: ccna companion question [7:17648]
The first answer would be correct, because it would require IP subnet-zero to be running. This command allows the router to use the zero subnet (subnet with a base address of 0.0) to be used as a valid subnet. In this example, you have 4 bits of subnetting, which allows for 16 sub-networks(theoretically if the .255 and .0 subnets are valid, but then a again, thats what we are discussing) with 4094 valid hosts per subnet. The first valid subnet would be 156.100.0.0-156.100.15.255 with a base address of 156.100.0.0. Some older network equipment doesn't allow for the use of the zero-subnet, as it is seen as a base(even though it isn't . 0s in the host=base address) or even stranger a brodcast(some older gear from other manufacturers used all 0s as a broadcast, rather than all 1s. Just remember, we are talking about a zero in the network portion, not the host portion. Hope this explanation helps. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Teresa Presutto Sent: Wednesday, August 29, 2001 5:01 AM To: [EMAIL PROTECTED] Subject: ccna companion question [7:17648] CNNA Companion question (obviously I read the answer and I know the command , but I would like to know why...) Which of the following addresses would be require the use of ip subnet-zero command? 156.100.11.37 255.255.240.0 131.64.16.133 255.255.255.128 192.168.36.10 255.255.255.0 205.100.16.3 255.255.255.0 Ciao e grazie, Teresa Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=17653&t=17648 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
