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MULTINET4 MULTI-PORT SERIAL SERVER & MANAGED SWITCH – INSTRUCTION MANUAL
GLOSSARY
CHAPTER 1: GLOSSARY
CCITT
Comité consultatif international téléphonique et télégraphique. An
institution to coordinate telecommunication standards. Although the
CCITT acronyms is still widely used the institution has been known
since 1992 as ITU Telecommunication Standardization Sector (ITU-T).
CHAP
Challenge-Handshake Authentication Protocol. A method of
authentication of remote clients used by Point to Point Protocol (PPP)
servers and based on a shared secret.
CIDR
Classless Inter-Domain Routing. A CIDR address is written with a
forward slash preceding a suffix indicating the number of bits in the
prefix length, such as 192.168.0.0/16.
CIR
Committed Information Rate. A guaranteed data rate negotiated with
a carrier.
CFX
Configuration XML File.
DCE
Data Communications Equipment. Typically a communication device
such as a modem. In an RS-232 link a DCE communicates with a DTE.
DDS
Digital Data Service. A private line digital service from carriers other
than AT&T.
DES
Data Encryption Standard (DES). A NIST-standard cryptographic cipher
that uses a 56-bit key.
DHCP
Dynamic Host Configuration Protocol.
DiffServ
DIFFerentiated SERVices. A type of Quality of Service (QoS)
functionality.
DLCI
Data Link Connection Identifier. An identifying number for a private or
switched virtual circuit in a frame relay network.
DSCP
Differentiated Services Code Point. A value in the DiffServ portion of an
IP packet header used for classification purposes.
DSR/DTR
Data Set Ready/Data Terminal Ready. RS-232 handshake signals sent
from the modem to the terminal (DSR) or from the terminal to the
modem (DTR) indicating readiness to accept data.
DTE
Data Terminal Equipment. Typically a computer system. In an RS-232
link a DTE communicates with a DCE.
EGP
Exterior Gateway Protocol. An internet routing protocol.
ESP
Encapsulation Security Payload. An IPSec header extension for
supporting security services.
FCS
Frame Check Sequence. Extra characters added to a Frame for error
detection and correction.
FEFI
Far End Fault Indication.
Term
Definition