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Author isis question
bkhanh

2003-11-20, 4:25 pm

a question comes up during my ccie test prep.
Can someone helps please.

Below is the question:

Which statements are correct? (Select two.)
A. Within one area of ISIS, all links must have ip router isis configured.
At least one link in that area must have this command, if the IP routing is to work correctly.
B. In ISIS there is only one router responsible for originating the LSP for the LAN.
It is called the pseudonode.
C. The protocol ID, found in the ip header of CLNS is type 203.
D. You can run ISIS for IP, event without configuring a NET on the router.


I can only pick out A as one of the 2 answers to be selected. Can someone points out the second correct answer with some explanation please. Appreciate it.
btroadman

2003-11-21, 4:47 pm

Well a Pseudonode is a logical representation of the LAN which is generated by a DIS on a LAN segment. Now the DIS is the router that creates the pseudonode and acts on behalf of the pseudonode, there is only one DIS and has no backup DIS.

So I would say B.
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