Which of the following protocols would be used to test if one host is reachable by another host， by sending echo requests and waiting for echo replies？（）
- A、SNMP
- B、ICMP
- C、TCP
- D、UDP
正确答案:B
答案解析:有
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CompTIA认证考试
CompTIA认证考试
Which of the following protocols would be used to test if one host is reachable by another host， by sending echo requests and waiting for echo replies？（）
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