Fundamentals of computer networks - AQAWireless and wired networks

Networking computers brings many benefits to users. Without networking, many computing applications would not be possible.

Part ofComputer ScienceTheoretical knowledge

Wireless and wired networks

coloured ethernet cables

networks are identified by their use of physical wiring to connect devices. They are most often used for office networks or for devices that are unlikely to move as the cables limit the ability to move away from the connection point.

networks use radio waves to carry signals. These signals are limited in range - usually up to 50 metres - but are subject to interference. They can also be blocked by walls. However, they are ideal for mobile devices as a device can connect to a network as long as it is in the range of a wireless access point (WAP).

Wired networksWireless networks
CostInstallation costs can be expensiveCheaper to set up, devices can connect if in the range of a wireless access point
InstallationInstallation requires technical knowledge and space to install cablesInstallation is simple as most wireless devices will connect automatically
Maximum transmission speedUp to 1 gigabit per second for EthernetUp to 50 megabits per second
Maximum distance for reliable communicationUp to 100 metres for Ethernet - over 2 kilometres for fibre opticUp to 50 metres
Security of connectionMore secure as a physical connection is required to intercept dataLess secure as wireless signal cannot be contained within a building and no physical connection is needed to intercept data
Cost
Wired networksInstallation costs can be expensive
Wireless networksCheaper to set up, devices can connect if in the range of a wireless access point
Installation
Wired networksInstallation requires technical knowledge and space to install cables
Wireless networksInstallation is simple as most wireless devices will connect automatically
Maximum transmission speed
Wired networksUp to 1 gigabit per second for Ethernet
Wireless networksUp to 50 megabits per second
Maximum distance for reliable communication
Wired networksUp to 100 metres for Ethernet - over 2 kilometres for fibre optic
Wireless networksUp to 50 metres
Security of connection
Wired networksMore secure as a physical connection is required to intercept data
Wireless networksLess secure as wireless signal cannot be contained within a building and no physical connection is needed to intercept data
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Local area network hardware
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