BTEC ICT

BTEC ICT

1. Computer Networks

   • A Computer Network is a group of computers that have been linked together so they can send information via each other
     • This enables people to share files, software and data
     • Computers in a network are joined together by cables or radio waves
       • This allows data to move between computers
       • Computers which are located in the same building (e.g. in a work place) are connected by a Local Area Network (LAN)
         • Computers which are long distances apart (e.g. in a different town) are connected by a Wide Area Network (WAN)
     • Sometimes people use a type of computer network called a Hardware
       • This is a powerful computer which can store many files or programmes
         • The powerful computer will often control other computers and allows those users to access the file server from any machine contected to the network
     • A single computer on a network is called a work station

2. Data Exchange

   • Serial Transmissions
     • Serial transmission is the process of sending data one part at a time.
     • The information is usually sent over a computer channel or a computer bus