BGP (boundary gateway protocol) is a protocol for the Internet and its control. It can transmit routing information between multiple autonomous systems (AS) on the Internet and realize the connection between the network. The principle of BGP mainly uses routing priority to achieve transmission data. When there are multiple transmission lines between the two AS, BGP can choose the optimal path according to different routing priorities to achieve the best transmission of data.

　　The core of the BGP principle is route selection, which allows network devices to choose the best one from multiple routing, so as to achieve the best connection of the network. The basic principle of BGP selection of routing is: first look at the transmission distance, that is, the distance from the access point of the route to the target point, the closer the routing priority; the second depends on the quality, that is, the transmission speed and stability of the route. The higher the high routing priority; the last look at the cost of transmission, that is, the cost of the route, the lower the cost, the higher the routing priority. Based on these principles, BGP can achieve the best routing transmission according to different priority, thereby achieving the optimal connection of the network.

　　In addition, BGP can also detect whether the current routing is faulty and timely select other routes to ensure the stability of the network. BGP uses route feedback technology, which can feedback the network status in real time so that data can be transmitted to the destination faster. BGP can also adjust the routing priority in real time based on the changes in the routing, so that the data can be transmitted to the destination faster.

　　In general, BGP is a protocol for the Internet and its control. Its principle is mainly to use route priority to achieve transmission data. It can choose the optimal path according to different routing priorities to achieve data The best transmission. BGP can also detect whether the current routing is faulty, and re -select other routes in time to ensure the stability of the network. BGP uses route feedback technology, which can feedback the network status in real time, allowing data to transmit data to the destination faster, thereby achieving the best connection of the network.