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171
Glossary
8
802.11
A set of standards for transmitting data across a wireless network. 802.11 is commonly
known as Wi-Fi.
802.11a
An extension to 802.11 that transmits data at up to 54 Mbps in the 5GHz band. Although the
transmission speed is faster than 802.11b, the distance covered is much less.
802.11b
An extension to 802.11 that transmits data at up to 11 Mbps in the 2.4 GHz band. Although
the transmission speed is slower than 802.11a, the distance covered is greater.
802.1x
A standard for authentication on wired and wireless networks. 802.1x is commonly used
with 802.11 wireless networking. See also
(page 171).
authentication
A
access point (AP)
A network device (commonly called a wireless router) that plugs into an Ethernet hub or
switch to extend the physical range of service for a wireless user. When wireless users roam
with their mobile devices, transmission passes from one access point to another to
maintain connectivity.
ActiveX control
A software component used by programs or web pages to add functionality that appears as
a normal part of the program or web page. Most ActiveX controls are harmless; however,
some might capture information from your computer.
archive
To create a copy of important files on CD, DVD, USB drive, external hard drive, or network
drive. Compare to
(page 171).
back up
authentication
The process of verifying the digital identity of the sender of an electronic communication.
B
back up
To create a copy of important files, typically on a secure online server. Compare to
archive
(page 171).
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