mer [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, November 14, 2001 3:54 AM
To: [EMAIL PROTECTED]
Subject: RE: 2 "Line Hit" Scenarios... [7:25928]
You're obviously a trainer! I am too.
>> Only because I'm nit-picky enough to actually go and read the protocol
specs to prove a
You're obviously a trainer! I am too.
The CRC is handled by the NIC, not the OS of the computer. Just a nit-picky
thing. However, I also have to object to the main message that you are
giving. I think it's very important to mention that it is rare that B1 (a
bridge or router) would retransmit.
Line hits are caused by physical disturbances, electronic influences
on the transmission medium. The question draws attention to the serial
connection between B1 and B2, and a possible difference between Ethernet
connections. Ethernet makes no provision for physical layer protocol
retransmission
What did you have right to being with?
Priscilla
At 08:15 PM 11/12/01, Todd Carswell wrote:
>Priscilla,
>
>After reading your reply, I see that I had it right to begin with. I read a
>post on this board that asked a similar question on 11/5 and some of the
>answers threw me off a bit.
>
>Thx
>
Priscilla,
After reading your reply, I see that I had it right to begin with. I read a
post on this board that asked a similar question on 11/5 and some of the
answers threw me off a bit.
Thx
Todd
""Priscilla Oppenheimer"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> At 02
At 02:52 PM 11/12/01, jason wrote:
> > FYI, the reliability of LLC Type 2 is usually end-to-end (host-to-host).
>
>Ouch, you got me!
Didn't mean to "get you." It was just an FYI. ;-)
> > An end-station host would retransmit if a frame didn't get
> > acknowledged, not a router or bridge. When is
> FYI, the reliability of LLC Type 2 is usually end-to-end (host-to-host).
Ouch, you got me!
> An end-station host would retransmit if a frame didn't get
> acknowledged, not a router or bridge. When is that not the case? (A
> CID-type question. ;-)
Wl, what if the router were running dls
At 10:12 AM 11/12/01, [EMAIL PROTECTED] wrote:
>Ether normally is connectionless and unreliable, so the frame would be
>dropped by the receiver if an error is detected. A higher layer protocol
>will have to request transmission from the source.
>
>However, LLC type 2 service (used primarily for SN
It's PCA in both cases.
How do you think B1 (running Ethernet) would even know that there was a
line hit on the frame? It wouldn't. Ethernet is a best-effort,
connectionless protocol, with no ACKs, sequence numbers, etc.
You may be confusing media access control with reliability. Here's an
an
Ether normally is connectionless and unreliable, so the frame would be
dropped by the receiver if an error is detected. A higher layer protocol
will have to request transmission from the source.
However, LLC type 2 service (used primarily for SNA) provides reliable,
connection oriented service
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