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access control The prevention of access to unauthorized resources by users and systems.
access device A common term for a networking device through which client devices connect to a network, for example, a typical access point device.
ad hoc network An alternate term often used to reference an independent basic service set (IBSS).
Advanced Encryption Standard (AES) The encryption standard that replaced the Digital Encryption Standard (DES) in order to improve encryption strength. It is based on the Rijndael algorithm.
Application layer The layer of the OSI model (see OSI model) that provides access to the lower OSI layers for applications and provides information to applications from the lower OSI model layers. Also known as Layer 7.
area code A three-digit prefix identifying the geographic region to which calls should be routed.