From: fonesurj (dwinkworth@wi.rr.com)
Date: Wed Apr 04 2007 - 10:41:43 ART
Yes you are right about the path MTU discovery.
I wouldn't say the model for IP communications is that the network is a
"black box" and the host knows nothing of what is inside the network.
In mind, the network "ends" an the host "begins" at layer 4. This is where
end-to-end functions begin between the communicating hosts.
At layer 3, the "host" is no different then a router in many respects. For
instance, you can type "netstat -rn" on a Windows box and there you have a
routing table.
The host at Layer 3 is part of the network continuum.
----- Original Message -----
From: <johngibson1541@yahoo.com>
To: <ccielab@groupstudy.com>
Sent: Wednesday, April 04, 2007 9:47 AM
Subject: IPv6: routers don't fragment any packet. End hosts all MUST have
path MTU discovery ?
> Is that right?
>
> The hosts are 1 step more involved in the structure of the internetwork ?
>
> End host used to assume the internetwork is a black box and not possible
> to correctly determine any information inside the black box. Right ?
>
> John
>
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