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

Glossary
NSDIR.NET.SYS
Glossary
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NSDIR.NET.SYS The name of the active network
directory file. See also network directory.
P
packets Encapsulated messages transmitted across
a network or an internetwork.
privileged mode A capability assigned to accounts,
groups, or users allowing unrestricted memory
access, access to privileged CPU instructions, and
the ability to call privileged procedures.
probe protocol An HP protocol used by NS 3000/iX
IEEE 802.3 networks to get information about other
nodes on the network. It resolves names to IP
addresses, and resolves IP addresses to IEEE 802.3
addresses.
process A single instance of a program that is being
executed by the operating system, also known as a
task.
protocol A set of rules that enables two or more
data processing entities to exchange information. In
networks, protocols are the rules and conventions
that govern each layer of network architecture. They
define what functions are performed and how
messages are exchanged.
protocols file A file that contains a list of protocols
known to the system, plus the identification number
and one or more aliases for each. See also protocol.
PROTOCOL.NET.SYS The protocols file, described
above.
R
relay Using one node on an internetwork to pass
information through to another node or nodes. A
relay entry in the bootpd configuration file, for
example, provides the information necessary to
forward, or relay, bootstrap protocol requests to one
or more bootp servers.
remote host The host system from which you, as a
client, are requesting service.
remote node A node on an internetwork other than
the node you are currently using or referring to.
RSLVSAMP.NET.SYS Sample initialization file for
the domain name resolver.
RESLVCNF.NET.SYS An initialization file for the
domain name resolver. It contains information
needed by the network to determine how to resolve a
domain name to an IP address.
S
server A node on a network or internetwork that
provides on-demand service to requesting clients.
services file The file which associates official
service names and aliases with the port number and
protocol the services use. In the HFS name space,
this file is /etc/services.
SERVICES.NET.SYS The services name file,
described above.
socket A special kind of file that uniquely identifies
one end point of an Internetwork connection. A
socket specifies the protocol being used (for
example TCP) the Internetwork address (for
example 192.44.244.7) and the integer identifiying
the process (for example 377). A socket pair
completely specifies the two processes that make up
an Internetwork connection.
stream services A type of service that uses
Transmission Control Protocol (TCP) to exchange
information on an internetwork. Stream services
rely on an established, known connection between
two systems, client and host, similar to a leased or
dedicated phone line between two parties.
stream socket A type of socket that is used to
establish stream services between two systems.
subnet Another name for a network, especially if
the network is part of an internetwork. The word
subnet is also a synonym for intranet.
subnet mask A grouping of bits that determines
which bits of the IP address will be used to define a
subnetwork. The subnet mask is configured using
the NMMGR utility and specified in the same format
as an IP address.