A user is unable to reach the Internet. The technician asks the user to do an IPCONFIG /all. The userreports that their IP address is 172.16.1.18, subnet mask is 255.255.255.0, and their default gateway is 172.16.1.18. Which of the following is the cause of the problem?（）
- A、Default gateway
- B、Network cable
- C、Subnet mask
- D、CNAME record
正确答案:A
答案解析:有
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