问题 多项选择题

关于RSTP和STP的计算收敛的对比,说法正确的有()。

A.如果STP想缩短收敛时间,只能配置较小的Forward Delay时间,但是可能会影响到网络的稳定性

B.相对于STP,RSTP定义了边缘端口,这样可以使得连接PC主机的端口快速进入转发状态

C.相对于STP,RSTP定义了根端口快速切换机制,这样可以使得Alternate快速成为新的根端口

D.相对于STP,RSTP定义了指定端口快速切换机制,这样可以使得指定端口快速进入转发状态而不需要等待两倍的Forward Delay时间

答案

参考答案:A, B, C, D

阅读理解

Have you ever heard of blogs (博客)? If you haven’t, you should have. It’s here, it’s growing and it’s having an influence on our life. Surf the Internet and you’ll find blogs everywhere. A blog, shortened from “weblog”, is a public Internet journal written by one person or a group of people. It is a website in which a person or a group can place news, personal thoughts, text, photos, video or audio files, or links upon which visitors can comment. A blog lets you post on the Internet without having to know web design or be technical. You are given an environment to make dated entries on the topic of your choice which are “published”, so other people can read them.

Authoring a blog, maintaining a blog or adding an article to an existing blog is called “blogging”. Blogging has revolutionized Internet publishing in the last several years because it gives everyone with Internet access the opportunity to become an online writer. Objects, such as “text and photos” in a blog can be called “blog posts”, “posts”, or “entries”. The person who posts these entries is called a “blogger”.

Now, somewhere around the world, a blog is created almost every 6 seconds. Because it’s great potential, Bill Gates views it as important as e-mail, BBS, and MSN. He’s trying to make blogs the important tools for future business communications.

小题1:A blog is           .

A.a comment

B.an Internet journal

C.a design

D.a link小题2:A person can do the following things in a blog EXCEPT _______.

A.talk to others

B.give comments

C.read articles

D.enjoy photos小题3:Who is a blogger?

A.A person who posts letters.

B.A person who writes articles.

C.A person who posts text or photos in a blog.

D.A person who is an online publisher.小题4:According to the passage, the reason why blogs are so popular is that they ____.

A.give everyone the chance to be an online writer

B.can be created by people without much knowledge of computer technology

C.enable a blogger to place news, personal thoughts, text and photos and give comments

D.all of the above

判断题