Cisco路由器执行show access-list命令显示如下一组信息 Standard

【名词&注释】

存储器(memory)、Cisco路由器(cisco router)、下一代IP

[单选题]Cisco路由器执行show access-list命令显示如下一组信息 Standard IP access list block deny 10.0.0.0, wildcardbits 0.255.255.255 log deny 172.16.0.0, wildcard bits 0.15.255.255 permit any 根据上述信息，正确的access-list配置是

A. Router (config) access-list standard block Router (config-std-nacl) deny 10.0.0.0 255.0.0.0 log Router (config-std-nacl) deny 172.16.0.0 255.240.0.0 Router (config-std-nacl) permit any
B. Router (config) ip access-list standard block Router (config-std-nacl) permit any Router (config-std-nacl) deny 10.0.0.0 0.255.255.255 log Router (config-std-nacl) deny 172.16.0.0 0.15.255.255
C. Router (config) ip access-list standard block Router (config-std-nacl) deny 10.0.0.0 255.0.0.0 log Router (config-std-nacl) deny 172.16.0.0 255.240.0.0 Router (config-std-nacl) permit any
D. Router (config) ip access-list standard block Router (config-std-nacl) deny 10.0.0.0 0.255.255.255 log Router (config-std-nacl) deny 172.16.0.0 0.15.255.255 Router (config-std-nacl) permit any

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举一反三：

[多选题]下列存储器中，断电后信息不会丢失的是

A. DRAM
B. SRAM
C. Cache
D. ROM

[单选题]IPv6是下一代IP协议。IPv6的基本报头包含______个字节，此外还可以包含多个扩展报头。

A. 16
B. 32
C. 40
D. 60

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