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It can merely extend transport media's length so that compensate for the attenuation of signals．It is
A．repeater
B．bridge
C．router
D．gateway
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更多 “ It can merely extend transport media's length so that compensate for the attenuation of signals．It isA．repeaterB．bridgeC．routerD．gateway ” 相关考题
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共用题干
Media and Current EventsThe media can impact current events.As a graduate student at Berkeley in the 1960s,I remember experiencing the events related to the People's Park that were occurnng on campus.Some of these events were given national media coverage in the press and on TV.I found it interesting to compare my impressions of what was going on with perceptions obtained from the news media.I could begin to see events of that time feed on news coverage.This also provided me with some healthy insights into the distinctions between these realities.Electronic media are having a greater impact on the people's lives every day.People gather more and more of their impressions from representations.Television and telephone communications are linking people to a global village,or what one writer calls the electronic city.Consider the information that television brings into your home every day.Consider also the contact you have with others simply by using telephone.These media extend your consciousness and your contact.For example,the video coverage of the 1989 San Francisco earth- quake focused on"live action"such as the fires or the rescue efforts.This gave the viewer the impression of total disaster.Television coverage of the Iraqi War also developed an immediacy.CNN reported events as they happened.This coverage was distributed worldwide.Although most people were far away from these events, they developed some perception of these realities.In 1992,many people watched in horror as riots broke out on a sad Wednesday evening in Los Angeles, seemingly fed by video coverage from helicopters.This event was triggered by the verdict（裁定）in the Rodney King beating.We are now in an age where the public can have access to information that enables it to make its own judgments,and most people,who had seen the video of this beating,could not understand how the jury（陪审团）was able to acquit（宣布无罪）the policemen involved.Media coverage of events as they occur also provides powerful feedback that influences events.This can have harmful results,as it seemed on that Wednesday night in Los Angeles.By Friday night the public got to see Rodney King on television pleading,"Can we all get along?"By Saturday,television seemed to provide positive feedback as the Los Angeles riot turned out into a rally for peace.The television showed thousands of people marching with banners and cleaning tools.Because of that,many more people turned out to join the peaceful event they saw unfolding（展开）on television.The real healing , of course , will take much longer , but electronic media will continue to be a part of that process.All of the following statements are true EXCEPT that______.A:electronic media can extend one's contact with the worldB:those living far away from a certain event can also have some perception of realities by watching televisionC:all the events occurring on the university campus at Berkeley were given national media coverageD:video coverage of.the 1989 San Francisco earthquake gave the viewers the impression of the total disaster
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A two-node cluster is attached via SAN to shared disk. The customer has requested that one of the nodes be moved to another room 300 feet away. However， this distance exceeds the length specified by the RS232 specifications. What solution would resolve the RS232 specification issue with the fewest additional components？（）A、 Target mode fiber channel can be used with a SAN solution.B、 The heartbeat could be established by using a disk heartbeat.C、 An RS232 line driver can be used to extend the existing serial connection.D、 The NIM for the serial connection can be altered to compensate for the additional delay caused by the increased distance.
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多选题Some data storage and transfer media have fixed-length physical records. When the data records are short， more then one can be stored in a single， physical record to use the storage space efficiently. Consider this data： 1119 Smith 1120 Yvonne 1121 Albert 1130 Thomas Which two statements can you use to load the data into the EMP table？（）AABBCCDD
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问答题For a very long period of historical development, mankind could only pass on music through performance and oral instruction. When mankind invented musical scores, music started to break away from the boundaries of being merely a performing art, and develop into a system of “written symbols” that can be recorded and spread. Undoubtedly, however, it was the scientists who should be crowned as the founders of the real revolutionary milestone of human musical communication. Scientists invented marvelous means of music transmission, beginning from the earliest mechanical “record turntable” to today’s many kinds of “electronic media”.
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单选题—Can you tell me ______?— With Lucy’s help.A
when you did it so wellB
when did you do it so wellC
how you did it so wellD
how did you do it so well
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单选题— Can I help you to get it down? — （）A
No problemB
Yes. Let’s get itC
Thanks. It’s so nice of youD
It’s no trouble at all
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单选题What is Mary’s problem?A
She is so worried and can’t sleep.B
She can’t pass the exam.C
She can’t communicate with others.D
She can’t study English well.
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单选题下面哪个表达式可以获取字符串 s 的最后一个字符（）A
s.length（）B
s[s.length（） - 1]C
s.charAt（s.length（） - 1）D
charAt（s， length（s））
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单选题What’s the advantage when using the satellites?（）A
The message can be directed to the desired locationB
The message can follow the earth’s curvatureC
The quality of message can not be affected by climaticD
The range of the message extend and the quality of reception is improved
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单选题A two-node cluster is attached via SAN to shared disk. The customer has requested that one of the nodes be moved to another room 300 feet away. However， this distance exceeds the length specified by the RS232 specifications. What solution would resolve the RS232 specification issue with the fewest additional components？（）A
Target mode fiber channel can be used with a SAN solution.B
The heartbeat could be established by using a disk heartbeat.C
An RS232 line driver can be used to extend the existing serial connection.D
The NIM for the serial connection can be altered to compensate for the additional delay caused by the increased distance.
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