Page 124 - DCAP307_PLANNING_AND_MANAGING_IT_INFRASTRUCTURE

Planning and Managing IT Infrastructure

Notes radio waves where the implementation takes place at physical level. Wireless network is a
network set up by using radio signal frequency to communicate among computers and other
network devices. Sometimes it’s also referred to as Wi-Fi network or WLAN. This network is
getting popular nowadays due to easy to setup feature and no cabling involved. You can connect
computers anywhere in your home without the need for wires.

7.1 Wireless Communications Fundamentals

Wireless communication is the transfer of information over a distance without the use of electrical
conductors or wires. The distances involved may be short (a few meters as in television remote
control) or very long (thousands or even millions of kilometres for radio communications).
When the context is clear the term is often simply shortened to wireless. Wireless communications
is generally considered to be a branch of telecommunications.
Wireless communications encompasses various types of fixed, mobile, and portable two way
radios, cellular telephones, personal digital assistants (PDAs), and wireless networking.

Example: Other examples of wireless technology include GPS units, garage door openers
and or garage doors, wireless computer mice, keyboards and headsets, satellite television and
cordless telephones.

The term “wireless” has become a generic and all-encompassing word used to describe
communications in which electromagnetic waves or RF carry a signal over part or the entire
communication path.

Example: Wireless equipment in use today include:
Land Mobile Radio and Specialised Mobile Radio typically used by business, industrial
and Public Safety entities

Consumer Two Way Radio
The Amateur Radio Service
Consumer and Professional Marine VHF Radios

Cellular Telephones and Pagers
Global Positioning System (GPS)
Cordless Computer Peripherals
Cordless Telephone Sets

Satellite Television
Wireless Gaming
Wireless communication may be via: radio frequency communication, microwave
communication, or short-range communication infrared (IR), short-range communication.

Example: Microwave communication: long-range line-of-sight via highly directional
antennas. Short-range communication: from remote controls or via IRDA.
Applications may involve point-to-point communication, point-to-multipoint communication,
broadcasting, cellular networks and other wireless networks.

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