问题 填空题

下图是在一台主机上用sniffer捕捉的数据包,请根据显示的信息回答下列问题。

(1) 如果图中显示的是在该机上执行某个操作过程中捕获的所有数据包,那么该操作是①。

(2) 该主机上正在浏览的网站是②。

(3) 该主机上设置的DNS服务器的IP地址是③。

(4) 该主机采用HTTP协议进行通信时,使用的源端口是④。

(5)根据图中“No.”栏中信息,标识TCP连接三次握手过程开始的数据包的标号是⑤。

③是()

答案

参考答案:81.20.200

阅读理解

How many people have I met who have told me about the book they have been planning to write but have never yet found the time ? Far too many.

This is Life, all right, but we do treat it like a rehearsal (排演) and, unhappily, we do miss so many of its best moments.

We take jobs to stay alive and provide homes for our families always making ourselves believe that this style of life is merely a temporary state of affairs along the road to what we really want to do. Then, at 60 or 65, we are suddenly presented with a clock and several grandchildren and we look back and realize that all those years waiting for Real Life to come along were in fact real life.

In  America they have a saying much laughed at by the English:“Have a nice day” they speak slowly and seriously in their shops, hotels and sandwich bars. I think it is a wonderful phrase, reminding us, in effect, to enjoy the moment: to value this very day.

How often do we say to ourselves, "I'll take up horse-riding (or golf, or sailing) as soon as I get a higher position," only to do none of those things when I do get the higher position.

When I first became a reporter I knew a man who gave up a very well paid respectable job at the Daily Telegraph to go and edit a small weekly newspaper. At the time I was astonished by what appeared to me to be his completely abnormal (反常的) mental state. How could anyone turn his back on Fleet Street in central London for a small local area?I wanted to know.

Now I am a little older and possibly wiser, I see the sense in it. In Fleet Street the man was under continual pressure. He lived in an unattractive London suburb and he spent much of his life sitting on Southern Region trains.

小题1:

The first paragraph of the passage tells us that          .

A.we always try to find some time to write a book

B.we always make plans but seldom fulfill them

C.we always enjoy many of life's best moments

D.we always do what we really want to do小题2:

The underlined phrase "turn his back on" (paragraph 6) most probably means         .

A.leave for

B.return to

C.give up

D.rely on小题3:

The man ( paragraph 6) left his first job partly because he was           .

A.in an abnormal mental state

B.under too much pressure

C.not well paid

D.not respected小题4:

What is probably the best title for the passage?

A.Provide Homes For Our Family

B.Take Up Horse-riding

C.Value This Very Day

D.Stay Alive

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