D-Link DWS-1008 - AirPremier MobileLAN Switch Product Manual page 475

CBC-MAC See CCMP.
CCI - Co-channel interference. Obstruction that occurs when one signal on a particular frequency
intrudes into a cell that is using that same frequency for transmission. In multicell networks, systems are
designed to minimize CCI through appropriate transmission power and channel selection.
CCMP - Counter-Mode with Cipher Block Chaining Message Authentication Code Protocol. A wireless
encryption protocol based on the Advanced Encryption Standard (AES) and defined in the IEEE 802.11i
specification. CCMP uses a symmetric key block cipher mode that provides privacy by means of counter
mode and data origin authenticity by means of cipher block chaining message authentication code
(CBC-MAC). See also 802.11i; AES; TKIP; WPA.
Compare WEP.
cell - The geographical area covered by a wireless transmitter.
certificate authority (CA) - Network software that issues and manages security credentials and
public keys for authentication and message encryption. As part of a public-key infrastructure (PKI),
which enables secure exchanges of information over a network, a certificate authority checks with a
registration authority (RA) to verify information provided by the requestor of a digital certificate. If the
registration authority verifies the requestor's information, the certificate authority can issue a certificate.
Based on the PKI implementation, the certificate content can include the certificate's expiration date,
the owner's public key, the owner's name, and other information about the public-key owner. See also
registration authority (RA).
Certificate Signing Request - See CSR.
Challenge Handshake Authentication Protocol - See CHAP.
CHAP - Challenge Handshake Authentication Protocol. An authentication protocol that defines a three-
way handshake to authenticate a user (client). CHAP uses the MD5 hash algorithm to generate a
response to a challenge that can be checked by the authenticator. For wireless connections, CHAP is
not secure and must be protected by the cryptography in such authentication methods as the Protected
Extensible Authentication Protocol (PEAP) and Tunneled Transport Layer Security (TTLS).
client - The requesting program or device in a client-server relationship. In a wireless LAN (WLAN),
the client (or supplicant) requests access to the services provided by the authenticator. See also
supplicant.
co-channel interference - See CCI.
collision domain - A single half-duplex IEEE 802.3 Carrier Sense Multiple Access with Collision
Detection (CSMA-CD) network. A collision occurs when two or more Layer 2 devices in the network
transmit at the same time. Ethernet segments separated by a Layer 2 switch are within different collision
domains.
comma-separated values file - See CSV file.
communications plenum cable - See plenum-rated cable.
D-Link DWS-1008 User Manual