Introduction to Computer Networks

A computer network is a set of nodes connected by communication links to deliver a set of information.

Nodes: a node can be a computer, printer, or device capable of sending or receiving data generated by other nodes in the network.

Examples: computers, servers, printers, CCTV, switches, bridges, routers, etc.

Communication links: a communication link can be wired or wireless connections.

• Links carry the information.

• Communication links can be wired or wireless connections. i.e links(medium) can be wired or wireless. i.e cable, air, Bluetooth, etc.
• A computer network is used for resource sharing.

Computer networks

End devices	Intermediate devices
Printer	Router
Pc	Cloud
Server	Wireless router
Tablet	Cell tower
Smartphone	Switch

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