【单选题】
在OSI参考模型中能实现路由选择、拥塞控制与互联功能的层是___。
A. 传输层
B. 应用层
C. 网络层
D. 物理层
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答案
C
解析
暂无解析
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在下面对OSI参考模型的数据链路层的功能特性描述中,哪一项是不正确的?___
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C. 将数据分解成帧,按顺序传输帧,并处理接收端发回的确认帧
D. Ethernet的数据链路层分为LLC和MAC子层,并在MAC子层使用CSMA/CD协议争用信道
【单选题】
在OSI参考模型中,网络层、数据链路层和物理层传输的数据单元分别是___。
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下面属于TCP/IP协议族中网络互联层协议的是___。
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协议是______之间进行通信的规则或约定。___
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Having practiced so many times, I feel very ___ of my ability to deliver the presentation successfully.
A. satisfied
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The university decided to increase the ___ of the lecture hall, which has only 200 seats.
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Smart phones – with cameras and color screens – can ___ images and data using wireless network technology.
A. evolve
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Don’t take someone you get to know from the Internet to your house no matter how ___ he sounds.
A. bold
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This kind of exercise will ___ your creativity, renew your energy, and unlock your potential.
A. bind
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C. embrace
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I’ll be happy to help you, ___ you won’t take up too much of my time.
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It was a worthwhile attempt ___ it failed to achieve its purpose that we had hoped for.
A. in the end
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Travel in space can be very exciting; ___, it can also be boring and lonely at times.
A. so
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Politicians should not ___ in business affairs that might affect their political judgment.
A. engage
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I wish to ___ a master’s degree in electric engineering after I graduate from college.
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There is no greater importance ___ cultivating independence in children.
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He has made it very clear ___ we should observe the new rules.
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It was when I read his letter ___ I realized he had given me huge help.
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Don’t worry too much, Jane. Your son ___ home already. Let’s go back and check it out.
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___ they have written about the behaviors of animals is hardly anything new.
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No other drugs are as good as this one; it must have been based on a(n) ___ formula (配方).
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Mothers tend to be too ___ toward their children. They should let them see more of the worl D.
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The investigation ___ evidence of a large-scale illegal trade in wild birds.
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Poor Laura! I feel so sorry for her. When she fell, she hurt her arm and, ___, broke her glasses.
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It will be worth the efforts even if you fail; the rewards you ___ will be great.
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He suggested transporting the supplies by air. But it is absolutely ___, for it will cost too much.
A. unusual
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The newspaper didn’t mention the ___ of the damage caused by the fire.
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A. would like
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Science can now ___ many things which were thought to be mysterious by ancient people.
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