VLAN是为解决以太网的广播和安全问题而提出的一种解决方案。划分VLAN一般有四种不同的分类方法,其中最常用的VLAN是根据(37)划分的。由于基于传统的交换机作为第二层设备,只能识别并转发(38)地址,所以要支持VLAN间的通信只能借助干具有(39)功能的网络设备。
(75)
A. 端口
B. MAC地址
C. 网络层协议
D. IP组播
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听力原文:W: I am really glad the biology class is over. It was so tedious that I could hardly stay alert.
M: How could it be? I must admit I have never heard in ages anything so interesting.
Q: What is the man's attitude to the biology class?
(14)
A. He is also glad that the class finally came to a close.
B. He is not impressed by the class.
C. He is fascinated by the biology class.
D. He agrees with the woman.
Thomas Malthus was an Anglican clergyman.
A. Y
B. N
C. NG
听力原文:W: Good morning. This is housing office. How can I help you?
M: Hi. I'm calling about the new subsidized low-cost housing for graduate students.
W: Are you aware that it's only available to married graduate students and their families?
M: Yes. I think my wife and I may qualify since she's still in graduate school. But I was wondering whether there were any other requirements.
W: Well, unless you have more than one child, you have to have a combined annual income that's less than 5000 dollars.
M: I'm working as a part-time research assistant so that's no problem. But right now we're living with my wife's parents. Does that mean we have to include their income too?
W: Not necessarily. Why don't you stop by our office so I can give you some forms to fill out and explain everything in more detail?
M: That sounds like a good idea. Would tomorrow morning be all right?
W: I think the afternoon might be better. You know it can be pretty crazy around here on a Friday morning.
M: All right then. I'll try to make it in the afternoon, Is there anyone special I should ask for?
W: You can ask for me, Susan Davidson, or my assistant Bill Brown. We'll be glad to give you any help you need.
M: OK. Thanks a lot. See you then.
(20)
A. In his own apartment.
B. With his wife's parents.
C. With his grandparents.
D. In student housing.
An Intranet is (71) the application of Internet technology within an internal or closed user group.Internets are company and not do not have a (72) connection to the Internet.Usedproperly an Internet is highly effective corporate tool,capable of regularly (73) information toempower the workforce with the information needed to perform. their roles.Used in this Way,Internet represent a step towards the (74) office.
(84)
A. simple
B. simply
C. singlc
D. singly