Refer to the exhibit． What statement is true of the configuration for this network?

A、 The configuration that is shown provides inadequate outside address space for translation of the number of inside addresses that are supported．
B、 Because of the addressing on interface FastEthernet0/1, the Serial0/0 interface address will not support the NAT configuration as shown．
C、 The number 1 referred to in the ip nat inside souce command recerences access-list number 1．
D、 ExternalRouter must be configured with static routers to network 172．16．2．0/24

【正确答案】 C

【答案解析】A：该配置显示了内部全局地址不足以分配给所有内部局部地址，错误。使用了overload关键字，为PAT。
B:不支持NAT转换，错误。
C:ip nat insid source 1中1为access list 1
D：extemalrouter必须配置一条到172．16．2．0/24,错误。