【摘要】 通过对VPN技术基本原理、应用和与Cisco设备相关VPN解决方案的描述,分别列举了现有企业应用的二层、三层和四层VPN技术,阐述了VPN设计要求,同时对应用VPN进行组网需要注意的部分问题提出了自己的观点。更多还原

【Abstract】 This paper analyzes the fundamentals and applications of Virtual Private Network (VPN), and also describes many solutions on Cisco fixtures. The second VPN, third VPN and fourth VPN technology, as are widely adopted by enterprises, are covered in the paper. Some key issues that deserve special attention in VPN network design are pointed out.更多还原