Huawei H12-221 問題集

質問 1：
Which of the following statements are correct regarding how OSPF detects old or duplicate LSAs? (Select 3 answers)
A. The lower the sequence number, the more recent the LS
B. A router uses 0x80000001 as the sequence number when it generates the first LSA.
C. An LSA can be flushed from the routing domain by setting its LS age to equal the Maxage.
D. The smaller the LS age, the more recent the LSA.
正解：B,C,D

質問 2：
ABR of a Stub area does not flood Type-5 and Type-4 LSAs into the area. Therefore, the Stub area does not have the external AS routing capability. ABRs of the Stub area generate a default route into the area which enables packet forwarding to external destinations.
A. FALSE
B. TRUE
正解：B

質問 3：
Which of the following are OSPF message types? (Select 4 answers)
A. Link-State Request
B. Database Description
C. Link-State Update
D. Link-State Advertisement
E. Hello
正解：A,B,C,E

質問 4：
Which statements regarding BGP route advertisement are true? (Select 2 answers)
A. By default, the routes learned from IBGP peers are not advertised to other IBGP peers,
B. Only the optimal routes are advertised to other BGP peers.
C. Only the routes learned from an IGP are advertised to other BGP peers.
D. All BGP routes learned from BGP peers are advertised to other BGP peers,
正解：A,B

質問 5：
The defined route-policy set-cost configurations are: ip ip-prefix 1 permit 10.1.0.0 16 route-policy Set-cost permit node 10 if-match ip-prefix 1 apply cost 300 route-policy Set-cost permit node 20 apply cost 200
Which of the following statements is true?
A. All routes that fail to match node 10 will be denied.
B. The route 10.1.0.0/16 matches node 10 and its cost is set to 300.
C. The route 10.1.0.0/16 matching node 10 also matches node 20 and its final cost is set to 200.
D. Costs of all routes will be set to 200.
正解：B