The emergence of VPN technology stems from the need for security and flexibility in network communications. It provides a kind ofSecure communication on the Internet, to achieve the communication of the headquarters and branches of the enterprise, solvedInteroperability, security, cost issues。It provides more reliable security issues during remote access and data transmissionNetwork security protection mechanism.
1. Classification of VPN technology
VPN technology builds a private virtual network in the Internet:
1. Dedicated:VPN virtual network is a network specially used by VPN users, for users, the use of VPN and the Internet, users are not perceived, and the VPN virtual network provides security guarantees.
2. VirtualProposed:Compared with public networks, VPN networks are virtual and a private network in a logical sense.
2. Advantages of VPN technology
Safety:Establish a reliable connection between remote users, overseas agencies, partners, and business leaders to ensure the security of data transmission. This is essential to achieve the integration of e-commerce or financial networks with communication networks.
Low cost:With the help of public networks for information communication, companies can connect remote offices, travelers and business partners at a low cost.
Support for mobile services:Mobile access for VPN users on business trips at any time and anywhere to meet the needs of mobile services.
Scalability:Since a VPN is a logical network, adding or modifying nodes in the physical network does not affect the deployment of the VPN.
3. Key VPN technology - tunnel technology
The basic principle of VPN technology is the use of tunneling technology, which is analogous to train tracks and subway tracksRealized the direct connection of the private line from site A to site BCongestion is avoided. For the user, this is the equivalent of a chauffeur-driven service.
4. Value-added telecommunications business license (VPN).
Related Article: On the Importance of VPN Licenses.