What is the full form of MAN related to networking and what is the use?

Answer 1

Metro Area Network describes a network connecting buildings over a citywide area (or similar). A CAN (campus area network) would describe the wiring for an entire college or business campus. A LAN (large area network) describes the size of the infrastructure in a building. A WAN (wide area network) would be between a MAN and a CAN in size.

The purpose, in large part, is to help determine the hardware involved. A LAN can use Ethernet switches to carry data, but no Ethernet run can exceed 300 feet (100 meters), and even then, only if good wiring practices are followed. A MAN would require cable or data runs measured in miles, so would need hardware capable of carrying signals over much greater distances (microwave dish antennas, for example) or hard-wired equipment designed for longer cable runs than just 300 feet.