What is VPN

VPN's full name in English is the "Virtual Private Network", is translated through the "virtual private network." As the name suggests, virtual private network, we can understand it as a virtual enterprise out of line. It can be a special encrypted communication protocols in the Internet connection in different places at two or more enterprises to establish a network between the proprietary communication lines, is set up like a line, but it does not The real need to lay fiber optic cable like the physical line. It can be compared to apply for telephone line, but not for the cost of laying lines, there was no need to buy routers and other hardware equipment. VPN router technology used to be one of the important technologies currently in the switch, firewall software, such as equipment or WINDOWS2000 also features VPN support, saying, VPN is the core of the use of public networks in the establishment of virtual private network.
Virtual Private Network (VPN) is defined as through a public network (usually the Internet) to establish a temporary and safe connection is through a confusing network of public security, stability of the tunnel. Virtual Private Network is the expansion of the Intranet. Virtual Private Network can help remote users, branch companies, business partners and suppliers with the company's internal network to connect the establishment of credible security and guarantee the security of data transmission. Virtual private networks can be used for the growing global mobile users Internet access in order to achieve a secure connection; corporate Web site can be used to achieve secure communications between virtual private leased circuits, for cost-effective to connect to business partners and customers secure Extranet Virtual Private Network. We combine the following site related to Cisco and Microsoft VPN on the articles you for this information, more and a wealth of relevant aspects of our content will be added for days after.
For different user requirements, VPN There are three solutions: remote access virtual network (Access VPN), virtual enterprise network (Intranet VPN) and the expansion of enterprise virtual network (Extranet VPN), the three types of VPN with traditional long-distance Access network, enterprise and corporate Intranet network partners and corporate networks posed by the Extranet (external expansion) corresponds to.