1.3 computer networks

-easy to share documents (can work on same document at once), 1 internet connection required (can be shared between every device connected to network), backups carried out automatically, can login to any machine connected to LAN

increased security risks to data malware/viruses spread easier between devices if server fails, computers may not work computer may run slower if lots of data transmitted

Wide Area Network = connection of devices over large geographical area, hardware usually leased

Local Area Network= smaller geographical area of connected devices, equipment usually owned

amount of data transmitted in given time

larger amount available is more data transmitted in given time, if many users on network bandwidth to each may be limited so slows rate, if large media files are streamed demand on bandwidth is higher so could reduce quality of video

All devices are connected to a central server.- The central server receives and processes requests from ‘clients’. -The server stores user account details and files.

devices have equal abilities, no central server (relatively easy to maintain), no dependence on server, easy to set up, responsible for own security and backup

switch, router, wireless access point

transmit data between 2 or more different networks

Domain Name System= pairs domain with appropriate IP (internet protocol)

requires central switch (all devices are connected to) - switch makes sure traffic goes where intended, if single cable breaks only that computer is affected

every device connected to every other device, if any of connections broke can re-route traffic, more expensive as more hardware required