Configuring and Managing MPE/iX Internet Services (August 2002)

Glossary
241
Glossary
A
address An identifier defined and used by a
particular protocol and associated software to
distinguish one node from another.
address resolution In NS networks, the mapping
of node names to IP addresses and the mapping of IP
addresses to subnet addresses. See also probe
protocol, ARP.
alias A character string that is used as an alternate
name for a protocol or a node.
ARP Address Resolution Protocol. ARP provides IP
to LAN station address resolution for Ethernet
nodes on a LAN.
ARPA Advanced Research Projects Agency.
ARPANET The computer network of the Advanced
Research Projects Agency.
ASCII American National Standard Code for
Information Interchange. A character set using 7-bit
code used for information interchange among data
processing and data communications systems. The
American implementation of International Alphabet
No. 5.
B
binary mode Data transfer scheme in which no
special character processing is performed. All
characters are considered to be data and are passed
through with no control actions being taken.
bind A system call that assigns a specific name and
unique address to a socket, turning a socket (which
is one end-point of the connection) into an actual file.
Binding allows servers to register well-known
addresses with the system and each client to register
a specific address for itself. See also socket and
well-known addresses.
bootp Internet Boot Protocol (BOOTP) used to
start, or boot, LAN devices such as routers, printers,
X-terminals, and diskless workstations.
BOOTPTAB.NET.SYS The configuration file for
the Bootstrap protocol daemon, bootpd, that
contains client and relay information.
C
client A node on the internetwork that asks to use
one of the Internet Services on the host. For
example, a Telnet client is the process that uses
Telnet protocol to establish a virtual terminal on
your system.
D
daemon A process that either waits for the
occurrence of an event or waits to perform some
specificied task on a periodic basis. Daemons are
typically started once, on system startup, and they
frequently start other processes to handle service
requests. The Internet daemon inetd is a good
example of such a process.
datagram A message consisting of content and all of
the information needed to deliver the content
between one system and another. Datagrams are
sent using the User Datagram Protocol, or UDP. See
also UDP.
datagram service A connectionless service that
transmits messages, or datagrams, from one system
to another. Because datagrams are transmitted
without relying on a pre-established network
connection (hence the term connectionless), each
datagram must contain all the information required
for its delivery. The protocol associated with
datagram service is UDP, or User Datagram
Protocol. See also datagram, protocol, and UDP.
DCE Data circuit-terminating equipment. The
interfacing equipment required in order to interface
to data terminal equipment (DTE) and its
transmission circuit. Synonyms: data
communications equipment, dataset.
domain name A name designated for a system in
ARPANET standard format. This name can be used
by other nodes on the network to access the host for
which it is configured.
DTC Datacommunications and Terminal Controller.
The DTC is a hardware device, configured as a node
on a LAN, that enables asynchronous devices to
access HP e3000 computers. Terminals can either be
directly connected to the DTC, or they can be
remotely connected through a Packet Assembler
Disassembler (PAD). The DTC can be configured
with DTC/X.25 Network Access cards and DTC/X.25