glossary

A numerical identifier defined and used by a particular protocol and associated software to distinguish one node from another.

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.

Avesta Flow Control Protocol. An HP proprietary protocol which provides data flow control features. AFCP is optimized for communications between nodes, including DTCs, in an MPE/iX environment.

Address Resolution Protocol. ARP provides IP to LAN station address resolution for Ethernet nodes on a LAN.

Advanced Research Projects Agency.

The Advanced Research Projects Agency computer network.

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.

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.

A sequence of eight consecutive bits operated on as a unit.

A Telnet client provides outbound Telnet access to a remote host.

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.

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.

Datacommunications and Terminal Controller. The DTC is a hardware device, configured as a node on a LAN, that enables asynchronous devices to access HP 3000 Series 900 computers or HP 9000 Series 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 (running on the host) and the DTC/X.25 Network Access software (running on the DTC).

An HP product providing Telnet connections from HP 9000 and non-HP systems running ARPA standard Telnet services to the HP 3000. 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).

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.

A session that is established on a remote node.

A Local Area Network system that uses baseband transmission at 10 Mbps over coaxial cable. Ethernet is a trademark of Xerox Corporation.

Assignment statement used to associate a file with a specific device or type of device during execution of a program.

The part of the operating system that handles access to input/output devices, data blocking, buffering, data transfers, and deblocking.

A means of regulating the rate at which data transfer takes place between devices to protect against data overruns.

The application protocol offering file service in the Internet suite of protocols developed by the Advanced Research Projects Agency (ARPA)

The primary or controlling computer on a network. The computer on which the network control software resides. For HP purposes, it may also be used to distinguish the MPE/iX system (host) from the DTC.

The host name database file which associates Internet addresses with official host names and aliases.

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 LAN.

Internet Superserver. When a Telnet connection comes into an HP 3000, inetd starts the telnet server.

A protocol used to provide routing between different local networks in an internetwork, as well as among nodes in the same local network. See also IP address.

A set of programs that allows your computer to exchange information with other nodes on the internetwork. Each of the programs uses a standard TCP/IP communications protocol originally developed for the Advanced Research Projects Agency (ARPA). For this reason, Internet Services are sometimes referred to as ARPA Services.

System call or procedure accessible by user programs which provides an interface to operating system resources and functions. Intrinsics perform common tasks such as file access and device control.

Internet Protocol. A protocol used to provide routing between different local networks in an internetwork, as well as among nodes in the same local network. The internet protocol corresponds to layer 3, the network layer, of the OSI model. See also IP address.

Internet Protocol address. An address used by the Internet Protocol to perform internet routing. A complete IP address comprises a network portion and a node portion. The network portion of the IP address identifies a network, and the node portion identifies a node within the network.

The system from which your Telnet session is initiated. This is the side running the Telnet client software.

The routing of messages from a node back to itself.

The operating system for the HP 3000 Series 900 computers.

This can be either 1) the network portion of an IP address as opposed to the node portion, or 2) when referring to X.25 networks, it is a node's X.25 address.

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.

The collective software and hardware 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. Network interface types are LAN, FDDI, point-to-point (router), X.25, token ring, SNA, loopback, and gateway half. The maximum number of supported NIs is 12, one of which is reserved for loopback.

A file that contains all the network configuration data for the HP 3000 Series 900 computer on which it resides. It includes information about the DTCs 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.

Node management services maintenance utility. A utility that lists the software module version numbers for all HP network products, including NS 3000/iX. It detects missing or invalid software modules.

Node Management Services Configuration Manager. A software subsystem that enables you to configure DTC connectivity and network access parameters for an HP 3000 Series 900 computer.

Node management services conversion utility. A conversion program that converts configuration files created with NMMGR from an earlier version to the latest format.

A computer that is part of a network. The DTC is also considered to be a node and has its own address.

The node portion of an IP address

See NMMGR.

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.

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.

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, FDDI, Token Ring, and the NS Point-to-Point 3000/iX Link.

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.

capability assigned to accounts, groups, or users allowing unrestricted memory access, access to privileged CPU instructions, and the ability to call privileged procedures

An HP protocol used by NS 3000/iX IEEE 802.3 networks to obtain information about other nodes on the network. It provides name to IP address resolution, and IP to IEEE 802.3 address resolution.

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 to be performed and how messages are to be exchanged.

The system that the Telnet session is going to, from your local host. This is the host running the Telnet server software.

A node on an internetwork other than the node you are currently using or referring to

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.

Sample initialization file for the domain name resolver.

A Telnet server provides inbound Telnet access to a remote host.

The services name data base file which associates official service names and aliases with the port number and protocol the services use.

Sample services name data base file.

Another name for a network, especially if the network is part of an internetwork. The word subnet is also a synonym for intranet.

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.

Telnet Access Card. A board within a DTC 48 or 72MX.

Transmission Control Protocol. A network protocol that establishes and maintains connections between nodes. TCP 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.

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 ARPA environment to HP 3000 systems.

Telecommunications Network Protocol. The application protocol offering virtual terminal service in the Internet suite of protocols developed by the Advanced Research Projects Agency (ARPA).

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 ARPA environment to HP 3000 systems.

A file that contains the Telnet/iX product.

An HP product providing Telnet services over TCP/IP on MPE/iX.

The readme file for the Telnet/iX product.

Software package that emulates characteristics of some specific hardware terminal model(s). This includes mimicking the keyboard and display handling characteristics, and the communication link characteristics, of the emulated terminal.

A network service that allows a user to establish interactive sessions on a node.

Wide Area Network. A data communications network of unlimited size, used for connecting localities, cities, and countries.

Defines the interface between a DTE and a DCE for packet mode operation on a public data network (PDN).