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多数的网络技术部是由上至下进行普及的。通常,大型的网络用户对新的技术进行测试。然后中小网络用户开始使用这些新的技术。 但虚拟专用网(Virtual Private Networks,VPN)的普及方式正好相反。有分析表明,中小型的企业将先于大型企业使用VPN。 典型的VPN可以分成两种:商业用户专用的封闭型IP网络;基于公用Internet通过安全、通道(tunneling)和认证机制进行安全服务的网络。用户可以通过拨号线以及专线使用以上两种形式的网络服务。 VPN的最大优点在于价格低廉。多数的中小企业都需要性价比高的网络方案来连接远程办公地点,以便和工作人员、供货商及
Most of the network technology department is spread from top to bottom. Often, large web users test new technologies. Then small and medium network users began to use these new technologies. However, Virtual Private Networks (VPNs) are popularized in exactly the opposite way. Some analysis shows that small and medium-sized enterprises will use VPN before large-scale enterprises. A typical VPN can be divided into two types: a closed IP network for commercial users; and a network based on public Internet for security services through security, tunneling and authentication mechanisms. Users can use both the dial-up line and leased line network services. The biggest advantage of VPN lies in the low price. Most SMEs need cost-effective networking solutions to connect with remote offices to work with their staff, suppliers and