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1. Networks

The purpose of the network is to allow for the communication of information. A network connects
different nodes which are devices used on the network.
Nodes:-
Servers
Workstations
Printer
Wireless router
Router
Hub
Switch
Gateway
Repeater

Network topologies

Ring




Nodes connected in a ring.




Star




Central device usually…

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Bus




Nodes are connected by transmission mediums such as copper wire or fibre optic cable.

Network nodes

Server ­ a powerful computer that provides services to other computers. E.g file server provides file
services, email server provides email services, web server provides web services.
Router ­ a device which forwards…

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Servers provide services such as:-
Printing
Files (storing and accessing them)
Web
Email
Security
Back up

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