A computer network is a group of computers that use a set of common communication protocols over digital interconnections for the purpose of sharing resources located on or provided by the network nodes.

A local area network is a group of computers and peripheral devices that share a common communications line or wireless link to a server within a distinct geographic area

A wide area network is a telecommunications network that extends over a large geographic area for the primary purpose of computer networking.

Peer-to-peer architecture is a commonly used computer networking architecture in which each workstation, or node, has the same capabilities and responsibilities.

Client-Server Architecture Is a computing model in which the server hosts, delivers and manages most of the resources and services to be consumed by the client.

A bus topology is a topology for a Local Area Network (LAN) in which all the nodes are connected to a single cable.

A ring topology is a network configuration where device connections create a circular data path. 

A star topology is a topology for a Local Area Network in which all nodes are individually connected to a central connection point, like a hub or a switch.

A mesh topology is a network setup where each computer and network device is interconnected with one another.

Protocol is the official procedure or system of rules governing affairs of state or diplomatic occasions.

Packet  is a formatted unit of data carried by a packet-switched network