客户路由器 MSR-1的以太网口 Ethernet1/0配置如下:
Interface Ethernet0/0
Ip address 192.168.0.1 255.255.255.0
该接口连接了一台三层交换机,而此三层交换机为客户办公网络的网段 192.168.7.0/24~192.168.83.0/24 的默认网关所在。现在客户要求在 MSR-1上配置ACL 来禁止办公网络所有用户向 MSR-1 的地址 192.168.0.1发起 Telnet,那么下面哪项配置是正确的?
A.正确答案A
Acl number 3000
Rule 0 deny 0.0.0.0 255.255.255.255 destination 192.168.0.1 0 destination-port eq telnet
Interface Ethernet0/0
Ip address 192.168.0.1 255.255.255.0
Firewall packet-filter 3000 inbound B.
Acl number 3000
Rule 0 deny 0.0.0.0 255.255.255.255 destination 192.168.0.1 0 destination-port eq telnet
Interface Ethernet0/0
Ip address 192.168.0.1 255.255.255.0
Firewall packet-filter 3000 outbound C.
Acl number 3000
Rule 0 deny 255.255.255.255 0 destination 192.168.0.1 0 destination-port eq telnet
Interface Ethernet0/0
Ip address 192.168.0.1 255.255.255.0
Firewall packet-filter 3000 inbound D.
Acl number 3000
Rule 0 deny 255.255.255.255 0 destination 192.168.0.1 0 destination-port eq telnet
Interface Ethernet0/0
Ip address 192.168.0.1 255.255.255.0
Firewall packet-filter 3000 outbound