What is the computer networking, state and describe 3 types and 3 toppological of network?

Computer networking is the practice of interfacing two or more computing devices with each other for the purpose of sharing data. Networks are built with a mix of computer hardware and software.

Three types of networks are:

1. Local Area Network (LAN): This is a group of computers and associated devices that share a common communications line or wireless link and typically share the resources of a single processor or server within a small geographic area.

2. Wide Area Network (WAN): This is a network that spans a large geographic area, often a country or continent. It contains a collection of machines intended for running user (i.e., application) programs. These machines are connected by a communication network, which has its own machine, called a router.

3. Metropolitan Area Network (MAN): This is a network that interconnects users with computer resources in a geographic area or region larger than that covered by even a large local area network but smaller than the area covered by a wide area network (WAN).

Three types of network topologies are:

1. Star Topology: In this type of network, all nodes are connected to a central computer or hub. The main advantage of this topology is that if one node fails, it does not affect the rest of the network. However, if the central hub fails, the whole network goes down.

2. Ring Topology: In this type of network, each node is connected to exactly two other nodes, forming a single continuous pathway for signals through each node - a ring. Data travels from node to node, with each node along the way handling every packet.

3. Bus Topology: In this type of network, all devices are connected to a central cable, called the bus or backbone. Bus networks are relatively inexpensive and easy to install for small networks. The disadvantage of a bus network is that if the main cable fails or gets damaged, the entire network fails.