问题 单项选择题

在IPv6协议中,一台主机通过一个网卡接入网络,该网卡所具有的IPv6地址数最少为()个。

A.1

B.2

C.3

D.4

答案

参考答案:C

解析:

本题考查IPv6的基本内容。

IPv6规定每个网卡最少有3个IPv6地址,分别是链路本地地址、全球单播地址和回送地址,这些地址都可以是自动分配的。链路本地地址用于在链路两端传输数据,类似于(但不完全等同于)IPv4的私用IP地址。全球单播地址用于在Internet上传输数据,类似于IPv4中的合法的公网IP地址。回送地址用于网络测试,类似于IPv4的127.0.0.1。

阅读理解

The Beets were a new couple (夫妇). The things in their rooms, such as the television, the computer, the fridge, furniture and so on, were all left by their parents. They only paid some money for their food and clothes. But they tried their best to save money. If they had something important to tell their friends, they always visited them instead of calling them.

One day, it was a quarter past nine. Mr. Beet didn’t come back. His wife was a little worried. The supper was cold and she had waited for two hours. She was sitting by the table in the dark room.

Suddenly the woman heard someone coming upstairs. It was her husband’s step. She hurried to open the door. In the dark she could hear his deep breathing(呼吸). As soon as he sat down, she turned on the light and found he looked very tired.

“Why do you come back so late, dear?” asked the woman. “Haven’t you caught a bus?”

“Yes, but I didn’t take it.” “Why not?”

“I ran after it so that I saved two dollars this evening.”

“That’s great!” the woman said happily. “Run after a taxi next time and you’ll save both more time and money.”

小题1:The supper was ready at       .

A.6:15

B.6:30

C.6:45

D.7:15小题2:Mrs. Beet sat in the dark because         .

A.she wanted to save money.

B.she didn’t like the bright light.

C.she was afraid to be seen.

D.she wanted to have a good rest.小题3:Mr. Beet went back          .

A.by taxi

B.by bus

C.on foot

D.by bike小题4:When Mr. Beet got home that evening,               .

A.his wife was angry with him

B.he was very tired

C.he was too hungry to say a word

D.his wife felt sorry小题5:Mrs. Beet hoped          .

A.her husband went home by bus the next time.

B.her husband could keep on doing exercise.

C.her husband could be stronger and stronger.

D.her husband could save more money and time.

单项选择题