400-101题库答案更新

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asunasun

anyisu 发表于 2018-8-25 13:18
QUESTION NO. 22
Which router on an IS-IS network generates the IS-IS pseudonode?
% [& p4 M( ?+ BA. DIS

# V9 P# `* {8 f( mWhat is the DIS?
On 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.
1 E( k. \$ }' P$ C
, a! I1 u* V* l: k. F$ X- bTwo major tasks are performed by the DIS:
' u3 q1 Q) G2 R: ^8 z2 o! K+ O
) t) ^2 ^, ^4 ]( M* B% H) j& FCreating and updating pseudonode LSP for reporting links to all systems on the broadcast subnetwork. See the Pseudenode LSP section for more information.

Flooding LSPs over the LAN.
% f2 W6 X. \6 d  ^2 @2 H; k1 X1 v9 x2 t
https://www.cisco.com/c/en/us/su ... 9627-DIS-LSP-1.html