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更新日期：2019-07-21
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目前版本：1.0
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Real Vpn One Touch-Millions of Connections Change VPN to bypass firewall unblock geographically restricted websites. Absolute safety protect data privacy, personal information when changing IP. In the traditional enterprise network configuration, the interconnection between off-site LANs is required. The traditional method is to rent a DDN (Digital Data Network) leased line or frame relay. Such communication schemes inevitably result in high network communication/maintenance costs. For mobile users (mobile workers) and remote individual users, they usually enter the LAN of the enterprise through a dial-up line (Internet), which inevitably brings security risks.
A virtual private network refers to a technology that relies on an ISP (Internet Service Provider) and other NSPs (network service providers) to establish a dedicated data communication network in a public network. In a virtual private network, the connection between any two nodes does not have the end-to-end physical link required by the traditional private network, but is dynamically composed of resources of a certain public network. The IETF draft understands that IP-based VPNs are: "Using IP mechanisms to emulate a private WAN" is a private-to-peer technology that simulates a point-to-point private line technology on a public data network [1]. Virtual is that users no longer need to have actual long-distance data lines, but long-distance data lines using the Internet public data network. The so-called private network means that users can develop a network that best suits their needs.
The data network such as Frame Relay and ATM leased by the telecommunications department provides a fixed virtual circuit (PVC-Permanent Virtual Circuit) to connect the units that need to communicate. All the rights are in the hands of others. If the user needs some other services, they need to fill in a lot of documents and wait for quite a while before they can enjoy the new service. More importantly, the terminal equipment at both ends is not only expensive, but also requires a certain number of professional technicians to manage, which undoubtedly increases the cost, and the frame relay and ATM data network will not be like the Internet, and can immediately contact any one in the world. Connect using a unit of the Internet network. On the Internet, VPN users can control their own connections with other users and support dial-up users.
So the virtual private network we are talking about generally refers to a private network that can be self-managed on the Internet, rather than a network that provides virtual fixed line (PVC) services such as Frame Relay or ATM. A VPN with IP as the main communication protocol can also be called IP-VPN.
Since VPN is a security-dedicated virtual network temporarily established on the Internet, users can save the cost of renting leased lines. In addition to purchasing VPN equipment, the company pays only a certain amount of money to pay for the ISP at the local location. The cost also saves long-distance telephone charges. This is why the VPN is cheap.
More and more users realize that with the booming of the Internet and e-commerce, the best way to economic globalization is to develop Internet-based business applications. With the increasing frequency of business activities, companies have begun to allow their business partners and suppliers to access the local area network of the enterprise, thereby greatly simplifying the way of information exchange and increasing the speed of information exchange. These cooperations and connections are dynamic and rely on the network to maintain and strengthen, so companies have found that such information exchange not only brings the complexity of the network, but also brings management and security issues, because the Internet is a global Sexual and open TCP/IP-based, unmanageable international Internet networks, so Internet-based business activities face unintentional information threats and security risks.
