CSR
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.
CSV
Comma-Separated Values. A file format that stores tabular data in the plain text format separated by
commas.
CTS
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.
CW
Contention Window. In QoS, CW refers to a window set for access categories 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
wider window when necessary.
DAI
Dynamic ARP inspection. A security feature that validates ARP packets in a network.
DAS
Distributed Antenna System. DAS is a network of antenna nodes strategically placed around a geographical
area or structure for additional cellular coverage.
dB
Decibel. Unit of measure for sound or noise and is the difference or ratio between two signal levels.
dBm
Decibel-Milliwatts. dBm is a logarithmic measurement (integer) that is typically used in place of mW to
represent receive-power level. AMP normalizes all signals to dBm, so that it is easy to evaluate performance
between various vendors.
DCB
Data Center Bridging. DCB is a collection of standards developed by IEEE for creating a converged data
center network using Ethernet.
DCE
Data Communication Equipment. DCE refers to the devices that establish, maintain, and terminate
communication network sessions between a data source and its destination.
DCF
Distributed Coordination Function. DCF is a protocol that uses carrier sensing along with a four-way
handshake to maximize the throughput while preventing packet collisions.
DDMO
Distributed Dynamic Multicast Optimization. DDMO is similar to Dynamic Multicast Optimization (DMO)
where the multicast streams are converted into unicast streams on the AP instead of the controller, to
AOS-W 6.5.3.x | User Guide Glossary of Terms | 1126
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