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UNCLASSIFIED
Glossary
Version 1.0g
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IP
Internet Protocol The network-layer protocol on which the
Internet is built. There are two extant versions of IP: IPv4
and IPv6. IPv4 is standardized in RFC 791. IPv6 is
standarized in RFC 1883.
[Note: all the discussion in this guide concerns IPv4.]
IPSec
Internet Protocol Security a set of standards that define
confidentiality and integrity protection for IP traffic. IPSec
is standardized by a set of RFCs including RFC 2401.
ISAKMP
Internet Security Association Key Management Protocol
one of the precursors of IKE (see also IKE, IPSec).
Kerberos
Kerberos was developed by the Massachusetts Institute of
Technology as a network authentication system, and it
provides strong authentication for client/server applications
by using secret-key cryptography. Kerberos is standardized
in RFC 1510 (see also RADIUS).
LAN
Local Area Network general term for a single -segment or
switched network of limited physical and organizational
extent.
LANE
LAN Emulation A standard mechanism for routing IP
packets over ATM.
MAC Address
Media Access Control address the link layer address of a
network interface, especially Ethernet interfaces. An
Ethernet MAC address is 48 bits long.
MD5
Message Digest algorithm 5 a widely-used cryptographic
checksum algorithm, standardized in RFC 1321.
MIB
Management Information Base the hierarchical data
organization used by SNMP. (See also SNMP)
MPOA
Multi-Protocol Over ATM A proposed standard
mechanism for hosting network protocols (such as IP) over
ATM. (See also LANE)
Multicast
An operational feature of IP, in which packets can be
broadcast to partic ular recipients based on address. In IPv4,
addresses from 224.0.0.0 to 225.255.255.255 are usually
multicast group addresses.
NNTP
Network News Transfer Protocol a TCP -based application
protocol that usually runs on port 119.
NTP
Network Time Protocol the standard network time
synchronization protocol, can use UDP or TCP, but usually
uses UDP, port 123. NTP is standardized in RFC 1305.