多项选择题

What are two reasons for using a virtual link in OSPF?（）

A. Provides fast convergence times.
B. Supports connections of multiple backbones.
C. Eliminates the need for a Designated Router.
D. Supports non direct connections to the backbone.

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单项选择题

By default, to which peers will a BGP router advertise routes learned from IBGP peers?（）

A. all BGP peers
B. all IBGP peers
C. all EBGP peers
D. all MBGP peers

单项选择题

What is a function of the OSPF Type 7 LSA?（）

A. It describes the reachability of routes in stub areas.
B. It describes the reachability of routes in totally-stubby areas.
C. It describes the reachability of routes in not-so-stubby areas.
D. It describes the reachability of routes in partially-stubby areas.

单项选择题

Given the following LSP configuration, which statement is true?（）label-switched-path lsp-xyz { to 10.200.1.1; primary path1; secondary path2; secondary path3; no-cspf; } path path1 { 10.200.10.1 strict; } path path2 { 10.200.20.1 strict; } path path3 { 10.200.30.1 loose; }

A. The router will use path1 when it is available and stable.
B. The router will use path3 when it is available and stable.
C. The router will attempt to establish path2 only when path1 and path3 are down.
D. The router will attempt to establish path1 only when path2 and path3 are down.