ATT（Attached）bit
IS-Type bits
P（Partition）bit
Down bit
PN（Pseudonode）biy
ABR（Area Border Rorter）bit
第1题：
A. describes a change to the OSPF hello timer
B. carries one or more link-state advertisements
C. establishes and maintains neighbor relationships
D. describes the contents of the entire link-state database
第2题：
What is periodically sent by a DIS on a LAN to ensure that all adjacent neighbors' IS - IS link - state databases are synchronized?（）
第3题：
A. Restrain the formation of adjacencies.
B. Control the flooding scope of link-state PDUs.
C. Partition the L2 backbone into multiple domains.
D. Aggregate L1 domains into a contiguous backbone.
第4题：
Which two statements are correct regarding IS-IS?（）
第5题：
ATT （Attached ）bit needs to be set in the link state PDUs in an IS-IS level-1-2 router to indicate that theyare a potential exit point out of the area.（）
第6题：
What bit should be set in the link state PDUs in an IS-IS level-1-2 router to indicate that they are a potentialexit point out of the area ？（）
第7题：
Which of following is used to periodically multicast by DIS on a LAN to ensure IS-IS link state databaseaccuracy？（）
第8题：
A. An Adjacency is formed.
B. No IS-IS PDUs are sent.
C. An Adjacency does not form.
D. An Adjacency forms but traffic is not forwarded.
第9题：
What is the flooding scope of an OSPFv3 LSA， if the value of the S2 bit is set to 1 and the S1 bit is set to 0？（）
第10题：
Two Level 1 routers are exchanging Hello packets with different Area IDs.What occurs between these routers?（）