判斷題對于一個主接口,可以為它提供多個備份接口,當主接口出現(xiàn)故障時,多個備份接口可以同時接替主接口進行通訊。

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1.多項選擇題下面能夠表示"禁止從129.9.0.0網(wǎng)段中的主機建立與202.38.16.0網(wǎng)段內(nèi)的主機的WWW端口的連接"的訪問控制列表是()。

A.acl101 rule deny tcp source129.9.0.00.0.255.255 destination 202.38.16.00.0.0.255 destination-port equal www
B.acl101 rule deny tcp source129.9.0.00.0.255.255 destination 202.38.16.00.0.0.255 destination-port equal 80
C.acl100 rule deny udp source129.9.0.00.0.255.255 destination 202.38.16.00.0.0.255 destination-port equal www
D.acl99 rule deny udp source129.9.0.00.0.255.255 destination 202.38.16.00.0.0.255 destination-port equal www

3.單項選擇題Which command is used to see the path taken by packets across an IP network?()

A.show ip route
B.show route
C.traceroute
D.trace ip route

5.單項選擇題Which component of VPN technology ensures that data can be read only by its intended recipient?()

A.data integrity
B.encryption
C.key exchange
D.authentication