Networks

Advantages

• Access files from different places
• Some programmes can be lisenced on a network for cheaper
• Certain hardware can be shared
• Files can be backed up all at once, rather than for each individual computer
• Messages can be sent to other computers over the network

Disadvantages

• Vulnerable to viruses
• Can be unreliable
• If the server comes down then the whole network is offline
• Wiring and installation can be expensive to buy and install
• A trained person is needed to run it
• External communication equipment can be expensive to run

LANs and WANs

• LANs are local area networks, and are fairly close. Usually within a single building. They are connected with wires or radio wireless transmitters.
• WANs are wide area networks. They are spread over a much larger area in different buildings, different sites and even different countries. They use telephones, satellites or cables. The internet is a WAN.

Levels of Access

Network Technician - Change passwords, Change shared files, Add new users, Plus all below

Head Teacher - View financial records, view staff records, Pluss all below

ICT Teacher - View student records, Plus all below

Student - Change own password, Use software for homework