Types of Networks

WAN - Wide Area Network

This covers a large geographical area and connect computers and LAN’s with the use of cables, satellites and a modulator demodulator. WAN’s allow computers to communicate between each other even if there is a large geographical gap. The largest and most popular example of a WAN is the Internet. The Internet is used by most computer literate people.

Advantages of a WAN

• Allows computers to communicate between each other regardless of the physical location of the computer.
• Allows information to be shared between a large number of people.

Disadvantages of a WAN

• Viruses can be spread through a computer system because all of the computers are linked.
• Hackers are a problem with networked computers because they all contain information which could be useful.
• Managing a large system takes high abilities which means that someone would need to be employed/trained.

LAN - Local Area Network

This covers a small geographical location, usually just a site. This network is linked through a series of cables. LAN's are most commonly used in buildings and offices. They allows users on the system to share data with anyone else on the network. A file server is used to store all of the information on a LAN network.

Advantages of a LAN

• Users are able to share peripherals & resources (saving money).
• Security is good within the network unlike the risks associated with WAN’s.
• Files can easily be shared between users.
• The file server can easily be backed up to protect the data.

Disadvantages of a LAN

• File servers and network cabling can be quite expensive.
• The network has to managed very effectively, especially considering LAN’s in schools or office buildings.
• Viruses can easily be spread throughout other computers within the network.
• If the file server crashes or is hacked, the whole network is at risk.

MAN - Metropolitan Area Network

This covers an area such a city, town or campus. This network could be connected through cables, microwaves and satellites. This network falls in the geographical grey area between a WAN and a LAN. It can connect small LANs to large WANs