Appendix A
A.1 Glossary of Terms
SCALANCE W1750D CLI
732 Function Manual, 03/2019, C79000-G8976-C452-04
Service. CoS is used in data and voice protocols for classifying
packets into different types of traffic (voice, video, or data) and setting a ser-
vice priority. For example, voice traffic can be assigned a higher priority over
email or HTTP traffic.
Customer Premises Equipment. It refers to any terminal or equipment located
at the customer premises.
Control Plane Security. CPsec is a secure form of communication between a
controller and APs to protect the control plane communications. This is pe
r-
formed by means of using public
-key self-signed certificates created by each
Central Processing Unit. A CPU is an electronic circuitry in a computer for
processing instructions.
Cyclic Redundancy Check. CRC is a data verificat
ion method for detecting
errors in digital data during transmission, storage, or retrieval.
Certificate Revocation List. CRL is a list of revoked certificates maintained by
a certification authority.
Short for cryptographic binding. A p
rocedure 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 b
inding pro-
tects both peer and server.
Channel Switch Announcement. The CSA element enables an AP to adver-
tise 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.
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 inform-
ing devices not to transmit any data until the broadcasting channel is free.
Certificate Signing Request. In PKI systems, a CSR is a message sent from
an applicant to a CA to apply for a digital identity certificate.
-Separated Values. A file format that stores tabular data in the plain
text format separated by commas.
Clear to Send. The CTS refers to the data transmission and protection
mechanism used by the 802.11 wireless networking protocol to prevent
frame collision occurrences. See RTS.
Contention Window. In QoS, CW refers to a window set for access catego-
ries based on the type of traffic. Based on the type and volume of the traffic,
the minimum and maximum values can be calculated to provide a wide
r win-
Dynamic ARP inspection. A security feature that validates ARP packets in a
network.
Distributed Antenna System. DAS is a network of antenna nodes strategically
placed around a geographical area or structure for
additional cellular cover-
Decibel. Unit of measure for sound or noise and is the difference or ratio
between two signal levels.
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