WAN Technologies PSTN DSL and Cable

There are several WAN (Wide Area Network) technologies available, including PSTN (Public Switched Telephone Network), DSL (Digital Subscriber Line), and Cable.

PSTN is a traditional telephone system that uses copper wires to connect to a phone network. It provides a low bandwidth connection and is often used for voice communications, though it can also be used for data transmission with a modem.

DSL is a digital technology that uses existing telephone lines to provide high-speed internet access. It operates by splitting the phone line into two channels, one for voice and the other for data. DSL offers faster download and upload speeds than PSTN and is widely available in urban and suburban areas.

Cable internet uses the same infrastructure as cable television to provide high-speed internet access. It operates by sharing the available bandwidth among users in a given area. Cable internet can offer higher download speeds than DSL, but upload speeds are often slower. It is widely available in urban and suburban areas and is popular in homes and small businesses.

Each of these WAN technologies has its own advantages and disadvantages, and the choice of which to use depends on factors such as availability, cost, and bandwidth requirements.