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A B C D
E F G H
I J K L
M N O P
Q R S T
U V W X
Y Z
- 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.
- 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.
- 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.
- 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 Network Access software. A DTC/X.25 iX Network
Link consists of two software modules: the X.25 iX System Access software
(on the host) and the DTC/X.25 Network Access software
(on the DTC).
- DTC Telnet Access
An HP product providing Telnet connections from
HP 9000 and non-HP systems running ARPA standard Telnet services
to the HP e3000. The solution includes a Telnet Access Card (TAC)
that resides in the DTC 72MX or DTC 48 and provides protocol conversion
between Telnet and Avesta Flow Control Protocol (AFCP). Equivalent
functionality is provided by a separate product, the Telnet Express
Box (TEB).
- DTE
Data Terminal Equipment. Equipment that converts
user information into data transmission signals or reconverts received
data signals into user information. Data terminal equipment operations
in conjunction with data circuit-terminating equipment.
- environment
A session that is established on a remote node.
- Ethernet
A Local Area Network system that uses baseband transmission
at 10 Mbps over coaxial cable. Ethernet is a trademark of Xerox
Corporation.
- file equation
An assignment statement that is used to associate
a file with a specific device or type of device during execution
of a program.
- flow control
A means of regulating the rate at which data transfer takes place
between devices to protect against data overruns.
- FTP
File Transfer Protocol. The Internet Services protocol
that facilitates the transfer of files between systems. Originally
developed by the Advanced Research Projects Agency (ARPA).
- host computer
A computer on which network communications software
resides, and which is currently providing a service to a requesting
client.
- HOSTS.NET.SYS
The host name data base file which associates Internet
addresses with official host names and aliases.
- IEEE 802.3
A standard for a broadcast local area network published
by the Institute for Electrical and Electronics Engineers (IEEE).
This standard is used for both the ThinLAN and ThickLAN implementations
of the Local Area Network (LAN).
- inetd
The Internet server that allows one daemon to invoke many
servers, thus reducing load on the system. Normally started at system
boot time, only one inetd can run at any given
time.
- INETDCNF.NET.SYS
The configuration file for the Internet daemon inetd,
which determines which installed Internet Services
are available to users.
- INETDSEC.NET.SYS
The optional security file for inetd, which lets you
control access to individual services
to specific accounts, groups, or users.
- internet
An aggregation of computer systems and other types
of computing equipment that share information according to a set
of defined communications protocols. Local networks, such as all
computer systems linked together within a company, are typically
linked to other local networks via the Internet. Or, individual
systems which are not part of a local network, such as a personal computer
or a standalone business computing system, can exchange information
via the Internet if they are equipped with the appropriate communications
software and hardware.
- Internet Protocol (IP).
A set of rules used to route information between
different local networks in an internetwork, as well as among nodes
in the same local network. The internet protocol corresponds to layer
three, the network layer, of the OSI model. See also
IP address.
- IP address
Internet Protocol address. An address used by the Internet
Protocol to route information. A complete IP address comprises a network
portion and a subnet portion to identify a specific network, and a node
portion to identify a node within that network.
- local host
The host system you are currently working from.
- local node
Same as host system.
- loopback
The routing of messages from a node back to itself.
- name space
The set of possible names allowed in a given environment. The
POSIX name space, which follows hierarchical file system syntax (i.e.
\sys\pub\myfile) is distinct from the MPE/iX name space, which
follows MPE naming rules (i.e. MYFILE.PUB.SYS).
- network address
Either the network portion of an IP address (as
opposed to the node portion) or a node's X.25 address when referring
to X.25 networks.
- network directory
A file containing information required for one node to
communicate with other nodes in
1) an internetwork,
2) an X.25 network, or
3) a network that contains non-HP nodes.
The active network directory on a node must be named
NSDIR.NET.SYS.
- Network Interface
The collection of software that enables data communication
between a system and a network. A node possesses one or more network
interfaces for each of the networks to which it belongs. Examples of
network interfaces include Local Area Networks (LANs), point-to-point
(router), X.25, token ring, SNA, loopback, and gateway half. The maximum
number of supportable network interfaces is 12, one of which is reserved
for loopback.
- Network Services
Software application products that can be used to
access data, initiate processes, and exchange information among
nodes in the network. The NS 3000/iX Network Services include RPM,
VT, RFA, RDBA, and NFT.
- NI
See
Network Interface.
- NMCONFIG.PUB.SYS
The file that contains all the network configuration
data for the HP e3000 computer on which it resides. It includes
information about the clients that can access the system as well as
information about any Network Services (NS) products running on
the system. This is the only file name allowed.
- NMMAINT
Node Management services MAINTenance utility. A utility that
lists the software module version numbers for all HP AdvanceNet products,
including NS 3000/iX. It detects missing or invalid software
modules.
- NMMGR
Node Management Services Configuration Manager.
A software subsystem that enables you to configure network connectivity
and access parameters for an HP e3000 computer.
- NMMGRVER
Node management services conversion utility. A conversion
program that converts configuration files created with NMMGR from
an earlier version to the latest format.
- node
A computer that is part of a network. The DTC, or
Datacommunications and Terminal Controller that enables asynchronous
devices to access the HP e3000, is also considered to be
a node and has its own address.
- node address
The node portion of an Internet Protocol (IP)
address.
- Node Management Services Configuration Manager
See NMMGR.
- node name
A character string that uniquely identifies each system in a
network or internetwork. Each node name in a network or internetwork must
be unique; however, a single node can be identified by
more than one node name.
- NS
See Network Services.
- NS 3000/iX Link
Software and hardware that provides the connection
between nodes on a network. Some of the NS 3000/iX links
available are the ThinLAN 3000/iX Link and its ThickLAN
option, the DTC/X.25 iX Network Link, and the NS Point-to-Point
3000/iX Link.
- NS 3000/iX Network Services
Software applications that can be used to access
data, initiate processes, and exchange information among nodes in a
network. The services are RPM, VT, RFA, RDBA, and NFT.
- NSDIR.NET.SYS
The name of the active network directory file. See
also network directory.
- 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.
- PROTOCOL.NET.SYS
The protocols file, described above.
- 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.
- 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.
- 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.
- RSLVSAMP.NET.SYS
Sample initialization file for the domain name
resolver.
- 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.
- TAC
Telnet Access Card. A board within a DTC 48 or
72MX.
- TCP/IP
Transmission Control Protocol/Internet Protocol.
A set of rules that establishes and maintains connections between
nodes on an internetwork. TCP/IP regulates the flow of data, breaks
messages into smaller fragments if necessary (and reassembles the
fragments at the destination), detects errors, and retransmits messages
if errors have been detected.
- TEB
Telnet Express Box. An HP product consisting of a DTC dedicated
to providing protocol conversion between Telnet on TCP/IP and AFCP to
allow incoming calls from the Internet Services environment
to HP e3000 systems.
- Telnet
The application protocol offering virtual terminal service in the
Internet suite of protocols developed by the Advanced
Research Projects Agency (ARPA).
- TELNET.ARPA.SYS
A file that contains the Telnet client program.
- TELNTDOC.ARPA.SYS
The readme file for the Telnet client program.
- TFTP
Trivial File Transfer Protocol, TFTP, a set of rules
used to read and write files to or from a remote system.
- UDP
User Datagram Protocol, a set of rules used to send
connectionless messages called datagrams between systems.
UDP requires much less overhead than a protocol such as TCP because it
does not require acknowledgement from the recipient that the message
reached its destination.
- Virtual Terminal
A network service that allows a user to establish
interactive sessions on a node.
- WAN
Wide Area Network. A data communications network of unlimited
size, used for connecting localities, cities, and
countries.
- well-known address
The port number that identifies the specific user process of an
available and commonly-used Internet Service. For example, the port
number for the File Transfer Protocol (FTP) is 21.
- X.25
Defines the interface between a DTE and a DCE for
packet mode operation on a public data network (PDN).
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