问题 问答题

【问题1】 如果以前已经配置过这台服务器为VPN服务器,现在需要重新配置,该怎么操作

答案

参考答案:

解析:在“SERVER” (服务器名)上单击右键,选“禁用路由和远程访问”,即可停止此服务,以便重新配置。 是一种网络新技术,为用户提供了一种通过公用网络安全地对企业内部专用网络进行远程访问的连接方式。一个网络连接通常由3个部分组成:客户机、传输介质和服务器,VPN同样也由这2,部分组成,不同的是VPN连接使用隧道作为传输通道,这个隧道是建立在公共网络或专用网络基础之上的,如:Internet或Intranet。 VPN的技术分为3类,一类是基于MPLS(多协议标记交换)。一类是基于L2TP(第二层隧道协议)等标准。它一般用于ISP部署自己的骨干网络并对外提供VPN服务,其的侧重点是在Internet上开出类似于专线性能的数据通道,信息安全方面最多只能实现点到点的安全,而且不能提供细粒度的安全服务,不适合企业构造复杂的、安全性要求非常高酌商业逻辑和应用。另一类是基于IPSec(三层隧道技术)的VPN技术。它的侧重点在于安全保密,融合了加密、认证与密钥管理等密码技术。目前;企业构建自己的VPN网络时基本都采用这种技术。

阅读理解

阅读理解

     Almost every body in America will spend a part of his or her life behind a shopping cart (购物手车) .

They  will , in  a  lifetime , push the chrome-plated contraptions many miles. But few will know-or even

think to ask-who it was that invented them. Sylvan N. Goldman invented the shopping cart in 1937. At

that time he was in the supermarket business. Every day he would see shoppers lugging (吃力地携带)

groceries  around  in baskets they had to carry.    

     One day Goldman suddenly had the idea of putting baskets on wheels. The wheeled baskets would

make shopping much easier for his customers , and would help to attract more business.On June 4,1937 ,

Goldman's first carts were ready for use in his market. He was terribly excited on the morning of the day

as customers began arriving.He couldn't wait to seethem using his invention.But Goldmanwas disappointed. Most shoppers gave the carts a long look , but hardly  anybody would  give them a try.  After a while.

Goldman decided to ask customers why they weren't using his carts. " Don't you think this arm is strong

enough to carry a shopping basket?" one shopper replied.But Goldman wasn't beaten yet. He knew his carts would be a great success if only he could persuade people to give them a try.

     To this end, Goldman hired a group of people to push carts around his market and pretend they were

shopping! Seeing this, the real customers  gradually  began  copying the phony(假冒的) customers. As

Goldman had hoped, the carts were soon attracting larger and larger numbers of customers to his market. But not only did more people come-those who came bought more. With larger, easier-to-handle baskets , customers unconsciously bought a greater number of items than before. Today's shopping carts are five

times larger than Goldman's original model. Perhaps that's one reason Americans today spend more than

five times as much money on food each year as they did before 1937-before the coming of the shopping

cart.

1. The underlined words"chrome-plated contraptions" in Paragraph  refer to

_____________. ( No more than 3 words. )

2. What was the purpose of Goldman's invention?  ( No more than 10 words. )

___________________________________________________________________

3. Why was Goldman disappointed at first?  ( No more than 10 words. )

___________________________________________________________________

4. Why did Goldman hire people to push carts around his market?  ( No more than 10 words. )

__________________________________________________________________

5. What do you think of Goldman? Please give your reasons. ( No more than 20 words)

_____________________________________________________________

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