HP 3000 Manuals HP 3000 Manuals
GLOSSARY address A numerical 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. ARP Address resolution protocol. ARP provides IP to LAN station address resolution for Ethernet nodes on a LAN. ARPA 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. byte A sequence of eight consecutive bits operated on as a unit. control connection The communication path between the FTP User PI and the Server PI used to exchange commands and replies. This connection follows the Telnet Protocol guidelines. data connection A full duplex connection over which data is transferred in a specified mode and type. The path may be between a server-DTP and a user-DTP, or between two server DTPs. directory See working directory. DTP The data transfer process that establishes and manages the data connection. 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 Assignment statement used to associate a file with a specific device or type of device during execution of a program. file system The part of the operating system that handles access to input/output devices, data blocking, buffering, data transfers, and deblocking. flow control A means of regulating the rate at which data transfer takes place between devices to protect against data overruns. host computer 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 XL system (host) from the DTC. 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 LAN. Internet Protocol (IP). 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. intrinsic System routine 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. 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. loopback The routing of messages from a node back to itself. network address 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. 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. NMDUMP A utility used to format log and trace files. NMMAINT A utility that lists the software module version numbers for all HP AdvanceNet products, including NS3000/XL. It detects missing or invalid software modules. NMMGR 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 A computer that is part of a network. The DTC is also considered to be a node and has its own address. node address The node portion of an 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. NS3000/XL Link Software and hardware that provides the connection between nodes on a network. Some of the NS3000/XL links available are the ThinLAN 3000/XL Link and its ThickLAN option, the DTC/X.25 XL Network Link, and the NS Point-to-Point 3000/XL Link. NS3000/XL 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 Name of the active network directory file. See also network directory. 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 NS3000/XL 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. probe proxy server A node on an IEEE 802.3 network that possesses a network directory. A probe proxy server can provide a node with information about other nodes on the same or other networks of an internetwork. 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 to be performed and how messages are to be exchanged. PI Protocol interpreter. In the FTP client-server model, describes the processing of FTP commands and replies over the control connection between the user and server. remote node A node on an internetwork other than the node you are currently using or referring to. Virtual Terminal A network service that allows a user to establish interactive sessions on a node. working directory While using FTP, the directory on the remote system currently being accessed. Terminology used on UNIX and MS DOS systems. On MPE XL, a comparable structure is group. X.25 address The X.25 address provided by the network administration if you are connected to a Public Data Network (PDN). X.25 address key An X.25 address key is a label that maps a node's IP address to its X.25 address and its associated X.25 parameters.