Comtech EF Data Vipersat 564L Guía de usuario Pagina 163

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Appendix E - Glossary E-1
A
PPENDIX
GLOSSARY
A
ACK A signal used in computing and other fields to indicate acknowledgement, such
as a packet message used in TCP to acknowledge the receipt of a packet.
ACM Adaptive Coding and Modulation – A technique that optimizes throughput in a
wireless data link by adapting the forward error correction code rate and the
modulation order according to the noise conditions (or other impairments) on
the link. A feature that is supported in CEFD modems such as the CDM-840
Remote Router.
ARP Address Resolution Protocol – A protocol for a LAN device to determine the
MAC address of a locally connected device given its IP address. See also MAC.
ASR Automatic Switch Request – A switch request message generated by older
Vipersat modems (e.g., CDM-570/L) that is sent to the VMS to establish a new
satellite link or adjust bandwidth between source and destination IP addresses.
B
Base
Modem
The main component in a satellite communications modem that consistes of a
circuit board with the modem hardware and firmware and the associeated inter-
faces.
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