某私网设备A 的IP 地址是192.168.1.1/24,其对应的公网IP 地址是2.2.2.1;公网设备B的IP地址是2.2.2.5。若希望B能ping通A,可以在NAT 设备上使用下列哪项配置( )
A.acl number 2000正确答案C
Rule 0 permit source 192.168.1.1 0.0.0.255
Nat address-group 1 2.2.2.1
Interface Ethernet 0/1
Nat outbound 2000 address-group 1 B.acl number 2000
Rule 0 permit source 192.168.1.1 0.0.0.255
Nat address-group 1 2.2.2.1
Interface Ethernet 0/1
Nat outbound 2000 address-group 1 no-pat C.nat server protocol icmp global 2.2.2.1 inside 192.168.1.1 D.nat server protocol icmp global 192.168.1.1 inside 2.2.2.1