lan = local area network

wan = wide area network

one or more servers may be part of a local area network

a server may also be a part of a wide area network

google has massive servers in several different countries

every google search uses the same amount of energy as making a cup of tea

example:

a school network, there may be dozens or even hundreds of clients and several servers and backups

a file server holds all the data files and databases and manages backups

a print server may organise printing on different printers

an email server may receive emails, detect and block spam, distribute emails to users

a web server may host in school the schools external website

role of a client on a client server

a client sends their request to a server waits and receives the reply

server role

waits for request from a client

acknowledges the request

it might be that the server needs to become the client

the data then gets returned to the original client

features

central server is used o manage security

some files re held on the central server

some processing tasks are performed by the server

client issue requests to the server for services such as email, file storage, small and large

can require specialist IT staff

	Created by corey Williams over 4 years ago

this is my first resource so please don't give hate if there is anything i missed since this is main revision for me and class m8's