Glossary
GL-2 8000-A2-GB20-20
November 1997
Digital Subscriber Line Access Multiplexer. DSLAM provides simultaneous high-speed
digital data access and analog POTS over the same twisted-pair telephone line.
A type of network that supports high-speed communication among systems. It is a 10-Mb/s
standard for LANs. All hosts are connected to a coaxial cable where they contend for
network access using a Carrier Sence Multiple Access with Collision Detection
(CSMA/CD) paradigm.
A six-part hexadecimal number in which a colon separates each part (for example,
8:0:20:1:2f:0). This number identifies the Ethernet communications board installed in a PC
and is used to identify the PC as a member of the network.
A rule or set of rules applied to a specific interface to indicate whether a packet can be
forwarded or discarded.
File Transfer Protocol. A protocol that allows a user on one host to access, and transfer
files to and from, another host over a network. The FTP application is used to provide file
transfer services across a wide variety of systems through the use of the File Transfer
Protocol (FTP). Usually implemented as application level programs, FTP uses the
TELNET and TCP protocols. The server side requires a client to supply a login identifier
and password before it will honor requests.
The subnet that the end-user system is on. This address, which is the e1a address of the
domain, is used as the return address when the authentication server responds.
High-Level Data Link Control. A communications protocol defined by the International
Standards Organization (ISO).
Internet Control Management Protocol. Internet protocol that allows for the generation of
error messages, tests packets, and information messages related to IP.
Worldwide interconnected networks that predominantly use the TCP/IP protocol. The
Internet is a three level hierarchy composed of backbone networks, mid-level networks,
and sub networks.
Private network that uses internet software and internet standards. The Intranet is
reserved for use by people who have been given the authority and passwords necessary
to use that network.
Internet Protocol. The TCP/IP standard protocol that defines the IP as a unit of information
passed across an Internet and provides the basis for packet delivery service. IP includes
the ICMP control and error message protocol as an integral part. The entire protocol suite
is often referred to as TCP/IP because TCP and IP are the two most fundamental
protocols.
Internet Protocol address. This is a 32-bit address assigned to host on a TCP/IP Internet.
The IP address has a host component and a network component.
Interservice Network.
Internet Service Provider.
Local Area Network. A network that spans a small geographic area (e.g., a building).
Media-specific Access Control. A protocol where packets transmitted over LAN ports are
encapsulated in Ethernet II MAC frames.
Media Access Control Address. Areas of memory your CPU uses to distinguish between
the various peripheral devices connected to your system when transferring or receiving
data. The MAC address is also known as the physical address.
DSLAM
Ethernet
Ethernet Address
Filter
FTP
gateway address
HDLC
ICMP
Internet
Intranet
IP
IP Address
ISN
ISP
LAN
MAC
MAC Address