What is a computer network? | Year 3 Computing PDF Download

Understanding Networks

• Networks refer to the interconnection of multiple computing devices such as computers, printers, and smart speakers, enabling them to communicate and share information.

What are computer networks?

• Computers can be part of a network, which forms when two or more computers are connected.
• Connected computers can share information, enhancing their capabilities compared to when they operate independently.
• Networks enable people to access the same information from any computer within the network.
• Being on a network allows digital devices, like printers or smart speakers, to be shared among connected computers.
• Any computer connected to a network can use a printer that is also connected to that network.

What are the main components of a network?

Networks are composed of various essential parts that facilitate the sharing of information.

• Clients: Clients are the devices used, such as computers, laptops, or tablets.
  
• Servers: Servers store the files you open, edit, and save.
  
• Switches: Switches ensure that information is directed to the correct destination.
  
• Cables: Cables establish connections between various network components and switches. 

Connecting to a Network

• Some devices connect to a network using an ethernet cable, known as a wired connection.
• Other devices like laptops, tablets, and smartphones can connect wirelessly using Wi-Fi.

Types of Networks

• LAN (Local Area Network)
  • A LAN is a group of devices connected in the same location, like home or school networks.
  • LANs are used in hospitals to facilitate sharing patient information among doctors and nurses.
• PAN (Personal Area Network)
  • A PAN involves connecting devices like Bluetooth headphones to a smartphone or tablet.
  • It allows for the sharing of information, such as sending music from a smartphone to headphones.
• WAN (Wide Area Network)
  • A WAN connects networks to one another, with the internet being the largest example referred to as the "network of networks."

Benefits of Network Connectivity

• Information Sharing: One major advantage of being connected to a network is the ability to share information seamlessly between different devices. For example, you can easily transfer files, documents, and data across computers or other connected devices.
• Remote File Access: Network connectivity allows you to access your files from any computer that is part of the network. This means you can work on your documents from various locations without the need to physically transfer files using external storage.
• Printer Sharing: When a printer is connected to a network, all devices connected to that network can use the printer. This eliminates the need for multiple printers in an office or household, promoting cost-effectiveness and convenience.