What are networks?

what are networks?

A network is a collection of connected nodes (computers and devices) which share resources like hardware, software and information.
Each device on a network is called a node.

Advantages of networks:

• Workgroups: Data sharing means that multiple people on a network can work on a piece of work simultaneously.
• Communication: Information like messages or files can be shared and transmitted easily across a network which saves a lot of time.
• Shared costs: Sharing devices like printers, or buying programs licences across a network is often cheaper than purchasing them for individual devices.
• Software sharing
• Backups: Networks are likely to have servers meaning backing up information is much quicker, and more efficient.

Disadvantages of networks:

• Viruses spread quickly.
• Network failures means everyone can’t work.
• Requires expertise to setup and maintain.
• Costs: Purchasing the hardware and cables required to create a network is expensive.
• Security: Devices being connected means there is a danger of hacking, and it is easier for viruses to spread across a network.

LAN (Local Area Network): Computers are connected to each other in a small geographical area with dedicate sires or WiFi connections. LANs are often maintained by the owner and are used in schools, homes, offices and shops.

Advantages	Disadvantages
Easyo to share information.	Can be expensive to set up. Costs of hardware and cabling and hosting.
Easy to share hardware like printers.	Requires expertise to setup and maintain.
Computers can be easily monitored.	Security issues as there can be unauthorised access to data.

WAN (Wide Area Network): Computers are connected to each other in a large geographical area which may be a city or the world. The internet is the largest WAN. WANs are often a collection of LANs are make use of publicly available telecoms facilities. They allow businesses to function from any location and allow for easy communication between all people from around the world.

Advantages	Disadvantages
Allows for much larger and more intricate networks.	Very expensive to actually setup.
Works in a very large area.	Can be slow depending on internet speed.
Gives more people access to data.	Still not accessible to everyone.