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在一台Cisco路由器的S0／3端口封禁端口号为4444的TCP数据包，只允许166．105．130．0／24和202．1 12．8．0／30子网的4444端口的TCP数据包通过路由器，正确的access-list配置是( )。
A．Router(config)#ip access-list extended block 4444 Router(config-ext-nacl)#permit tcp166．105．130．0 255．255．255．0 any eq 4444 Router(con6g-ext-nacl)#permit tcp202．112．8．0 255．255．255．252 any eq 4444 Router(config-ext-nacl)#deny tcp any any eq 4444 Router(config-ext-nacl)#permi tip any any Router(config)#interface s0／3 Router(config-if)#ip access-group block 4444 in Router(config-if)#ip access-group block 4444 out
B．Router(config)#ip access-list extended block 4444 Router(config-ext-nacl)#permit 166．105．130．0 0．0．0．255 any tcp eq 4444 Router(config-ext-nael)#permit 202．112．8．0 0．0．0．3 any tcp eq 4444 Router(config-ext-nacl)#deny any any tcp eq 4444 Router(config-ext-nacl)#permit ip any any Router(config)#interface s0／3 Router(config-if)#ip access-group test in Router(config-if)#ip access-group test out
C．Router(config)#ip access-listextended block 4444 Router(coonfig-ext-nacl)#permit tcp 166．105．130．0 0．0．0．255 any eq 4444 Router(config-ext-nacl)#permit tcp 202．112．8．0 0．0．0．3 any eq 4444 Router(config-ext-nacl)#deny tcp any any eq 4444 Router(config-ext-nacl)#permit ip any any Router(config-ext-nacl)#exit Router(config)#interface s0／3 Router(config-if)#ip access-group block 4444 in Router(config-if)#ip access-group block 4444 out
D．Router(config)#ip access-list extended block 4444 Router(config-ext-nacl)#permit tcp 166．105．130．0 0．0．0．255 any eq 4444 Router(config-ext-nacl)#permit tcp 202．112．8．0 0．0．0．3 any eq 4444 Router(config-ext-nacl)#deny tcp any any eq 4444 Router(config-ext-nacl)#permit tcp any any Router(config)#interface s0／3 Router(corffig-if)#ip access-group block 4444 in Router(config-if)#ip access-group block 4444 out
B．Router(config)#ip access-list extended block 4444 Router(config-ext-nacl)#permit 166．105．130．0 0．0．0．255 any tcp eq 4444 Router(config-ext-nael)#permit 202．112．8．0 0．0．0．3 any tcp eq 4444 Router(config-ext-nacl)#deny any any tcp eq 4444 Router(config-ext-nacl)#permit ip any any Router(config)#interface s0／3 Router(config-if)#ip access-group test in Router(config-if)#ip access-group test out
C．Router(config)#ip access-listextended block 4444 Router(coonfig-ext-nacl)#permit tcp 166．105．130．0 0．0．0．255 any eq 4444 Router(config-ext-nacl)#permit tcp 202．112．8．0 0．0．0．3 any eq 4444 Router(config-ext-nacl)#deny tcp any any eq 4444 Router(config-ext-nacl)#permit ip any any Router(config-ext-nacl)#exit Router(config)#interface s0／3 Router(config-if)#ip access-group block 4444 in Router(config-if)#ip access-group block 4444 out
D．Router(config)#ip access-list extended block 4444 Router(config-ext-nacl)#permit tcp 166．105．130．0 0．0．0．255 any eq 4444 Router(config-ext-nacl)#permit tcp 202．112．8．0 0．0．0．3 any eq 4444 Router(config-ext-nacl)#deny tcp any any eq 4444 Router(config-ext-nacl)#permit tcp any any Router(config)#interface s0／3 Router(corffig-if)#ip access-group block 4444 in Router(config-if)#ip access-group block 4444 out
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