VPNs use traffic control policies to arrange bandwidth based on priorities to prevent congestion. However, a large amount of bandwidth is idle during low traffic periods. During peak traffic periods, network bottlenecks are caused due to congestion, which greatly affects the transmission of real-time data. Wan traffic is unstable and bandwidth utilization is low, the traffic distribution is polarized. Stable and Efficient–VPNs provide quality service.It establishes tunnels. Encryption and identity protocols protect data from outside prying eyes, effectively preventing data theft and other unauthorized devices from reading the data. Full of Security–VPNs have a higher level of security.It provides an Internet infrastructure that is easy to set up so that both new and old users can quickly pick up and easily add to the network. Easy for use–VPNs give users a whole new experience.Home and business travel are no longer barriers to not being able to work, and business partners and others can take advantage of locally available high-speed broadband connections to connect to corporate networks. Convenient and Flexible–VPNs make it possible to work flexibly.The remote VPN gateway address specifies the destination address (the address at the other end of the VPN channel) to which the processed packets are sent.īecause communication is bidirectional, gateways at both ends of the channel must know the destination address of the packet and the remote VPN gateway address to ensure the correctness and stability of information transmission. In the entire flow, the destination address of the original data packet (VPN destination address) and the remote VPN gateway address are very important, which affect the whole VPN communication.Īccording to the destination address, the VPN gateway can determine which packets need to be processed, and those packets that do not need to be processed can be directly forwarded. Check and unpack: After the data packet arrives at the destination, the data packet is decrypted (unpack) after checking the digital signature.Transport: The encapsulated packets are transmitted over the public network through the channel.Packing: If encryption is required, the VPN device encrypts all the data (including the data to be transmitted, source IP address, and destination lP address), adds a data signature, and re-encapsulates new data headers (including the security information and initialization parameters required by the destination VPN device).

Select the delivery mode: According to the rules set by the network administrator, decide whether to encrypt the data (packaging and sealing) or directly transmit the data.Protect the host from sending information.The workflow of VPN is very similar to the sealing, transportation, and unpacking of express packages. This encryption process makes much of the data “unreadable” to the outside world as if it were a separate channel, but in fact, a VPN still uses a public network. The VPN in the middle transmits information to servers and user devices on both sides while encrypting the data. Then the VPN accesses the desired website. VPN essentially uses a series of encryption technologies to install a data exchange channel on the public network.Īfter a VPN server is installed on the Intranet, the Internet is connected to the VPN server when remote users want to access Intranet information. Some traditional enterprises choose to use leased DDN lines (which provide users with dedicated medium and high speed digital data transmission channels, so that users can use it to organize their own computer communication networks) for remote access, but this kind of equipment is relatively old, and enterprises need to pay more expensive communication costs and equipment maintenance costs. Of course, you can, but it can be a security risk for businesses and individuals. However, some people will question, why not choose the dial-up line to access the enterprise Intranet directly? So what is remote access? When you want to work from home, or when someone from another country wants to work on the company Intranet, such access requests are called remote access. VPN is a type of remote access technology that uses a public network to build a private network for users. VPNs are widely used in enterprise networks because they can be installed on servers, hardware, and software. The VPN gateway implements remote access by encrypting the data packet and converting the target address of the data packet. VPN creates a private network over a public network for encrypted communications. VPN is short for Virtual Private Network.

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