单项选择题
A.access-group B.access-list C.acl D.firewall packet-filter xxxx inbound/outbound
A.the IP address of Switch 1 B.the MAC address of Switch 1 C.the IP address of Host C D.the MAC address of Host C E.the IP address of the router's E0 interface F.the MAC address of the router's E0 interface
A.对端的IP地址和对端的x.121地址 B.对端的IP地址和本接口的x.121地址 C.本接口的IP地址和对端的x.121地址 D.本接口的IP地址和本接口的x.121地址