data transfer in ICT systems

data transfer in ICT systems

1. types of networks

   • WAN
     • wide area network
   • MAN
     • metropolitan network area
       • covers an area such as a town or city
   • LAN
     • locall area network
       • usally
   • PAN
     • personal area network
       • the links between personal device

2. types of network

   • peer-to-peer
     • at the simplest level two computers are linked together and possably joined to a printer.
     • each computer needs a network interface card and a connection to antother computer
     • if there is more than one computer it invloves a hub
   • client - server
     • used in bigger business such as schools and things like that.

3. intranet and extranet

   • intranet
     • is internal to the business and can only be acsessed by thoes inside the buisness
   • extranet
     • is the part of the company intranet that can be acsessed by other people including customer and suppliers
       • acsess must be limited as there is there is a posiblity for a breach of seurity on the intranet when they open it up this includes black hat hackers and other popotentaly damaging virus that can being a intire bussiness crashing down and losing millions of pounds.