Alcatel-Lucent AOS-W 6.5.3.x - Page 1125

1125| Glossary of Terms AOS-W 6.5.3.x| User Guide
CNA
Captive Network Assistant. CNA is a popup page shown when joining a network that has a captive portal.
CoA
Change of Authorization. The RADIUS CoA is used in the AAA service framework to allow dynamic
modification of the authenticated, authorized, and active subscriber sessions.
CoS
Class of Service. CoS is used in data and voice protocols for classifying packets into different types of traffic
(voice, video, or data) and setting a service priority. For example, voice traffic can be assigned a higher
priority over email or HTTP traffic.
CPE
Customer Premises Equipment. It refers to any terminal or equipment located at the customer premises.
CPsec
Control Plane Security. CPsec is a secure form of communication between a controller and APs to protect the
control plane communications. This is performed by means of using public-key self-signed certificates created
by each master controller.
CPU
Central Processing Unit. A CPU is an electronic circuitry in a computer for processing instructions.
CRC
Cyclic Redundancy Check. CRC is a data verification method for detecting errors in digital data during
transmission, storage, or retrieval.
CRL
Certificate Revocation List. CRL is a list of revoked certificates maintained by a certification authority.
cryptobinding
Short for cryptographic binding. A procedure in a tunneled EAP method that binds together the tunnel
protocol and the tunneled authentication methods, ensuring the relationship between a collection of data
assets. Cryptographic binding focuses on protecting the server; mutual cryptographic binding protects both
peer and server.
CSA
Channel Switch Announcement. The CSA element enables an AP to advertise that it is switching to a new
channel before it begins transmitting on that channel. This allows the clients, which support CSA, to transition
to the new channel with minimal downtime.
CSMA/CA
Carrier Sense Multiple Access / Collision Avoidance. CSMA/CA is a protocol for carrier transmission in
networks using the 802.11 standard. CSMA/CA aims to prevent collisions by listening to the broadcasting
nodes, and informing devices not to transmit any data until the broadcasting channel is free.