Communication method refers to the method of data transmission during the communication process, which mainly includes two types: serial communication and parallel communication.
Serial communication means that during the data transmission process, data bits are transmitted one after another, and each data bit is transmitted in sequence. Only one channel or line is required during the communication process. Serial communication is more efficient at transmitting data over long distances, but the transmission speed is relatively slow.
Parallel communication means that during the data transmission process, each data bit is transmitted through an independent channel or line, and multiple data bits can be transmitted simultaneously. Parallel communication is faster, but less efficient for long-distance data transmission.
In computer networks, communication methods are also divided into two types: circuit switching and packet switching. Circuit switching refers to the establishment of a dedicated physical connection during the communication process, and the communicating parties exchange data on the connection. Packet switching refers to dividing data into individual data packets for transmission. Each data packet is transmitted independently through the network and is reassembled after arriving at the destination. Packet switching can make more efficient use of network resources, but problems such as packet loss or delays may occur during transmission.
The underlying principles include data encoding methods, transmission rates, data transmission protocols, etc. during the communication process, and also involve the support and implementation of hardware devices.