Installing and Administering PPP

Glossary 165
Glossary
Maximum Receive Unit
(MRU): the size of the data field
in the largest PPP message a PPP
implementation can receive.
Maximum Transmission Unit
(MTU): the size of the largest IP
datagram an IP interface can send.
MRU: see Maximum Receive Unit.
MTU: see Maximum
Transmission Unit.
NCP: see Network Control
Protocol.
Network Control Protocol
(NCP): any of a group of protocols
that run after LCP has
successfully connected and whose
purpose is to establish and
configure a network-layer protocol.
Network-Layer Protocol: the
member of any protocol family
corresponding to Level 3 on the
ISO protocol stack. One example is
IP.
Packetized Ensemble Protocol
(PEP): a proprietary modulation
and error correction technique
used in some Telebit modems. It
can achieve throughput of up to
16000 bps, and is able to establish
and maintain connections over
noisy lines better than V.32, but is
is asymmetric, with slow line
turnaround and latency.
PAP: see Password Authentication
Protocol.
Passive-Open: an event internal
to the PPP configuration finite
state machine that causes PPP to
move from the Closed state to the
Listen state, where it awaits
Configure-Request messages from
the peer.
Password Authentication
Protocol (PAP): a simple LCP
authentication protocol that sends
an identifying name and an
associated password. PAP runs
after LCP negotitation is complete
but before any NCPs are started.
peer: the PPP implementation at
the other (far) end of the link.
PEP: see Packetized Ensemble
Protocol.
Point-to-Point Protocol
(PPP): the Internet standards-
track data-link protocol for
carrying multi-protocol datagrams
(including IP) over serial links.
PPP: see Point-to-Point Protocol.