A computer network is a number of computers linked together in order to exchange information 

a packet is a block of data transmitted across a network.

LAN is a group of computers and network devices connected together, usually within the same building. By

WAN is a computer network in which the computers connected may be far apart, generally having a radius of half a mile or more.

Nodes are a basic unit of computer science

The MAC address, which is made up of two equal parts, is 6 bytes long.

An IP Adress is a unique string of numbers separated by periods that identifies each computer using the Internet Protocol to communicate over a network.

A bus network is a network topology in which nodes are directly connected to a common linear half-duplex link called a bus.

A ring network is a network topology in which each node connects to exactly two other nodes, forming a single continuous pathway for signals through each node.

In telecommunication networks, a tree network is a combination of two or more star networks connected together

A protocol an agreed-upon format for transmitting data between two devices. 

Often referred to simply as peer-to-peer, or abbreviated P2P, a type of network in which each workstation has equivalent capabilities and responsibilities. 

Client-server is a network architecture in which each computer or process on the network is either a client or a server.

A hub is a common connection point for devices in a network.

a router is a device that forwards data packets to the appropriate parts of a computer network.