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VPN（Virtual Private Network,虚拟专用网络)连接是跨互联网建立的一条临时的安全的连接,是一条穿越不安全公共网络的可靠的隧道。（)
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更多“VPN(Virtual Private Network,虚拟…”相关的问题
According to the passage, remote working
A．rids people of the work which is required of them in the office.
B．requires the users to dial into the company's Virtual Private Network.
C．might be available for those not included in the government scheme.
D．was brought to people's minds by advancement of broadwidth tech.
B.配置AES算法可以提供可靠的数据完整性验证
C.部署IPsecVPN网络时，需要考虑IP地址的规划，尽量在分支节点使用可以聚合的IP地址段，来减少IPsec安全关联（Security Authentication，SA）资源的消耗
D.报文验证头协议（Authentication Header，AH）可以提供数据机密性
Nonetheless, many companies still hesitate to use the Web because of doubts about its reliability. "Businesses need to feel they can trust the pathway between them and the supplier," says senior analyst Blanc Erwin of Forrester Research. Some companies are limiting the risk by conducting online transactions only with established business partners who are given access to the company's private intranet.
Another major shift in the model for Internet commerce concerns the technology available for marketing. Until recently, Internet marketing activities have focused on strategies to "pull" customers into sites. In the past year, however, software companies have developed tools that allow companies to "push" information directly out to consumers, transmitting marketing messages directly to targeted customers. Most notably, the Pointcast Network uses a screen saver to deliver a continually updated stream of news and advertisements to subscribers' computer monitors. Subscribers can customize the information they want to receive and proceed directly to a company's Web site. Companies such as Virtual Vineyards are already starting to use similar technologies to push messages to customers about special sales, product offering, or other events. But push technology has earned the contempt of many Web users. Online culture thinks highly of the notion that the information flowing onto the screen comes there by specific request. Once commer-cial promotion begins to fill the screen uninvited, the distinction between the Web and television fades. That's a prospect that horrifies Net purists.
But it is hardly inevitable that companies on the Web will need to resort to push strategies to make money. The examples of Virtual Vineyards, Amazon.com, and other pioneers show that a Web site selling the right kind of products with the right mix of interactivity, hospitality, and security will attract online customers. And the cost of computing power continues to free fall, which is a good sign for any enterprise setting up shop in silicon. People looking back 5 or 10 years from now may well wonder why so few companies took the online plunge.
What do we learn about the present web business？
A．Web business is no longer in fashion.
B．Business-to-business sales are the trend.
C．Web business is prosperous in the consumer market.
D．Many companies still lack confidence in web business.
A.可以使用static和virtual说明
B.不能使用static和virtual说明
C.可以使用static说明，不能使用virtual说明
D.可以使用virtual说明，不能使用static说明
