The network administrator needs to address seven LANs. RIP version 1 is the only routing protocol in use on the network and subnet 0 is not being used. What is the maximum number of usable IP addresses that can be supported on each LAN if the organization is using one class C address block?（）
- A、8
- B、6
- C、30
- D、32
- E、14
- F、16
正确答案:C
答案解析:有
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