单项选择题
Which of the following is an OSPF configuration parameter that is used on an ABR, but not on an internal router？（）
A. A virtual link to area 0.
B. OSPF summarization command.
C. default - cost extension to the area command.
D. no - summary extension to the area stub comm and.
E. None of the other alternatives apply
相关考题
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多项选择题
An etwork administrator has enabled OSPF across an NBMA network and has issued the command ip ospf network nonbroadcast. Given those facts, which two statements are true?（）
A. Interfaces will automatically detect and build adjacencies with neighbor routers
B. DR and BDR elections will not occur
C. DR and BDR elections will occur
D. The neighbor command is required to build adjacencies
E. All routers must be configured in a fully meshed topology with all other routers -
单项选择题
According to RFC 2328, what is the stateful order in which an OSPF router transitions to a full adjacency with a neighbor router？（）
A. Down, Init, 2 - Way, Exstart, Exchange, Loading, and Full
B. Down, Init, 2 - Wa y, Exchange, Exstart, Loading, and Full
C. Down, 2 - Way, Init, Loading, Exstart, Exchange, and Full
D. Down, 2 - Way, Init, Exchange, Exstart, Loading, and Full
E. Down, Init, 2 - Way, Loading, Exstart, Exchange, and Full
F. Down, 2 - Way, Init, Exstart, Exch ange, Loading, and Full -
单项选择题
Refer to the exhibit. OSPF has been configured on all routers in the network and Area 1 has been configured as a NSSA. Which statement is true about the NSSA Area 1？（）
A. Only redistributed RIP routes will appear in Area 1. They will be advertised via t ype 7 LSAs
B. No redistributed routes can appear in Area 1, only summary routes
C. Redistributed RIP and IGRP routes will appear in Area 1. They will be advertised via type 5 LSAs
D. Only redistributed IGRP routes will appear in Area 1. They will be advertised via type 7 LSAs
