The difference between datagram and virtual circuit

Datagram and virtual circuit are two different network technologies, and the main difference between them lies in the way of transmitting data. Datagram is a simple transmission protocol, which encapsulates information in a datagram and transmits it in a "one-time delivery" way until it reaches its destination. Virtual circuit is a technology that attempts to simulate the traditional circuit telephone network. It establishes a virtual circuit to transmit data between source and destination, and can provide higher reliability.

Extension: In addition, another important difference between datagram and virtual circuit is their delay characteristics. When datagram transmits data, delay will not accumulate, but when virtual circuit transmits data, delay will accumulate. In addition, the data rate of datagram transmission is lower than that of virtual circuit. Therefore, virtual circuit can provide higher reliability and reliability when transmitting data, while datagram can provide faster transmission rate.