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●Tracert命令通过多次向目标发送(58)来确定到达目标的路径,在连续发送的多个lP数据包中,(59)字段都是不同的。
(58)
A.ICMP地址请求报文
B.ARP请求报文
C.ICMP回声请求报文
D.ARP响应报文
(59)
A.源地址
B.目标地址
C.TTL
D.ToS
A.ICMP地址请求报文
B.ARP请求报文
C.ICMP回声请求报文
C.ARP响应报文
(59)
A.源地址
D.目标地址
E.TTL
F.ToS
【参考答案】
C,C
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●ICMP协议属于TCP IP.网络中的(25)协议,ICMP报文封装在(26)协议数据单元中传送。(25)A.数据链路层 B.网络层 C.传输层 D.会话层(26) A.IP B.TCP C.UDP D. PPP
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The English people like take-away (11) . The most popular food is fish and chips. They (12) go to a fish and chip shop. They put the food in paper bags, and take it home, or to their work place. At (13) time, many people eat take-away food in the park. Chinese takeaways food are also very popular (14) . People in the USA and Australia like Chinese takeaway food, too. But the most (15) food in the USA is fried chicken.
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