400-101题库答案更新

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asunasun

anyisu 发表于 2018-8-25 13:18
+ `+ D# _4 T) Y& W" |6 JQUESTION NO. 22
Which router on an IS-IS network generates the IS-IS pseudonode?
A. DIS

What is the DIS?
: G% p) O( q0 e6 B( iOn broadcast multi-access networks, a single router is elected as the DIS. There is no backup DIS elected. The DIS is the router that creates the pseudonode and acts on behalf of the pseudonode.

Two major tasks are performed by the DIS:

Creating and updating pseudonode LSP for reporting links to all systems on the broadcast subnetwork. See the Pseudenode LSP section for more information.

3 V$ ]2 c; u: h; gFlooding LSPs over the LAN.
6 P$ O9 B0 i3 F" i
* Q* Q  w/ b" u  S4 r2 Lhttps://www.cisco.com/c/en/us/su ... 9627-DIS-LSP-1.html