Computer network s management and maintenance

有关于三网计算机等级考试编程题方法的一下经验和方法的总结，给参加考试的同学一些启迪- About three network programming method of computer grade examination on the summary of the experience and methods, give some enlightenment to students participating in the examination

A site-to-site VPN allows offices in multiple fixed locations to establish secure connections with each other over a public network such as the Internet. Site-to-site VPN extends the company s network, making computer resources one location available