wireless
The word wireless is dictionary defined as "having no wires". In networking terminology, wireless is the term used to describe any computer network where there is no physical wired connection between sender and receiver, but rather the network is connected by radio waves and/or microwaves to maintain communications. Wireless networking utilizes specific equipment such as NICs, APs and routers in place of wires (copper or optical fiber) for connectivity.
See "How Wireless Networks Work" in the "Did You Know..." section of Webopedia.
Also see the Wireless Networking Standards chart in the Quick Reference section of Webopedia.
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