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Preamble
Synchronizes transmissions in a WLAN. The preamble type defines the length of the Cyclic Redundancy
Check block for communication between a device and roaming wireless stations.
Protected Extensible Authentication Protocol (PEAP)
Authentication protocol of IEEE 802.1x used to send authentication data and passwords over 802.11
WLANs.
Quality of Service (QoS)
A network’s ability to deliver data with minimum delay. QoS also refers to the networking methods used
to provide bandwidth for real-time multimedia applications.
Remote Authentication Dial-In User Service (RADIUS)
Networking protocol that provides centralized authentication, authorization, and accounting
management for computers to connect and use a network service. Because of its broad support and
ubiquitous nature, the RADIUS protocol is often used by ISPs and enterprises to manage access to the
Internet or internal networks, WLANs, and integrated e-mail services.
Service Set Identifier (SSID)
Name of a WLAN. All wireless devices on a WLAN must use the same SSID to communicate with each
other.
Simple Network Management Protocol (SNMP)
An Internet-standard protocol for managing devices on IP networks.
Snooping
Passively watching a network for data, such as passwords, that can be used to benefit a hacker.
Temporal Key Integrity Protocol (TKIP)
An encryption protocol that uses 128-bit keys. Keys are dynamically generated and distributed by the
authentication server. TKIP regularly changes and rotates encryption keys, with an encryption key never
being used twice.
Transmission Control Protocol/Internet Protocol (TCP/IP)
A protocol that allows communications over and between networks. TCP/IP is the basis for Internet
communications.
Weighted Fair Queuing (WFQ)
WFQ services queues are based on priority and queue weight. Queues with larger weights get more
service than queues with smaller weights. This highly efficient queuing mechanism divides available
bandwidth across different traffic queues.
Wired Equivalent Privacy (WEP)
Security protocol that provides a WLAN with a level of security and privacy comparable to that of a wired
LAN. WEP encrypts data sent between wired and WLANs to keep transmissions private.
Wireless Local-Area Network (WLAN)
