unit 3 networks targets

unit 3 networks targets

1. IMAP/SMTP

   • IMAP: will leave the message on a server. they can be accesed by multiple devices and they only are removed if the user deletes them
   • SMTP: an email protocol used for sending email
     • email software such as outlook, sends the email to the SMTP server used by the company or individual
     • the mail sever then relays the through various other servers known as mail relays
     • the mail arrives at the destination mail server

2. WAN

   • A wide area network (WAN) is a network that is spread over a wide geographical area. It can cover more than one site, or be spread across a country, or even the world.
   • Organisations that have more than one office or branch, such as banks, tend to use a WAN. The WAN allows the head office to communicate and share data with the sub-offices and branches.

3. LAN

   • A LAN is a network that is geographically confined to one building or site. Examples include organisations, schools, colleges, universities and in homes.

4. client server networks

   • Servers tend to be quite powerful machines. They need the processing power because many other computers connect to them.
   • A client is a computer that relies on other computers (servers) to provide and manage data . The computer a person uses on a network is a client.
   • Clients do not usually store data. Furthermore, they have no control over the network as a whole or over individual computers.
   • Client-server networks are best suited to organisations with many computers, or to situations where many computers need access to the same information. Many schools use this type of model.

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