What network does pstn belong to?

PSTN stands for PublicSwitchedTelephoneNetwork, which is a communication network based on traditional telephone technology.

PSTN network is a hierarchical architecture, which consists of telephone lines, switching centers and transmission links. The network uses analog signals to transmit audio data, and these signals are transmitted through fixed telephone lines.

PSTN network was originally developed in the late 19th century and early 2th century, and the technology and infrastructure used are outdated. The main disadvantage of PSTN network is its limited bandwidth and low speed, which means that it can't effectively handle a large number of data transmission and high-speed Internet connections. In addition, PSTN network is also expensive, which requires high maintenance and update costs.

with the development of modern communication technology, many new communication networks have emerged, such as mobile communication networks, VoIP networks and cloud communication networks. These networks provide higher bandwidth, faster speed and lower cost, thus replacing PSTN networks.

operating principle of the network

the operating principle of the network can be divided into two aspects, namely the physical layer and the logical layer. Physical layer refers to the connection and data transmission of network hardware devices. The network is based on hardware devices, including computers, routers, switches, network cards and so on. The task of the physical layer is to establish the physical connection of data transmission and ensure that data can be transmitted between different devices. In this process, data will be transmitted in the form of electronic signals or optical signals.

the logical layer refers to the application of network protocols and data exchange. Network protocol is the rule and standard of network communication, which defines the format, specification and flow of data transmission. In the logical layer, the data will be divided into small pieces, and each packet will be added with some header information (such as source address, destination address, serial number, etc.), which will enable the packet to be transmitted in the network and finally reach the target device. In the process of transmission, data packets also need to be forwarded and processed by routers, switches and other equipment.