用十六进制表示的一一个TCP报文的头部数据为0d280015000000060000000070024000cO290000回答:(1)源端口号与目的端口号各为多少?(2)发送序列号是多少?(3) TCP头部长度是多少?(4)TCP连接是由什么样的应用层协议建立的?(5) TCP连接的状态是什么?
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Q: Where does the conversation most probably take place?[音频]
A. In a hotel.
B. In a restaurant.
C. At a travel agency.
D. At a flight ticket agency.
Q:What makes the woman scared of diving?[音频]
A. Encountering dangerous fish.
Being unable to swim fast in the sea.
C. Having no idea what time it is in the sea.
D. Being unable to go up to the surface again.
Q: What does the man think of the rise of fuel costs?[音频]
A. Many people will worry about using less energy.
B. Rising costs of fuel will benefit the environment.
C. Many people will worry about having to pay more.
D. Rising costs of fuel will force people to save money.
Q:According to the woman, what can the man benefit from going to the mountains?[音频]
A. He will become an adventurer.
B. He will find a good place to study in.
C. He will become closer to his friends.
D. He will be relaxed and ready for study again.
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