The OpenVMS User's Guide, Second Edition
A broad introductory overview of OpenVMS that focuses on command procedures, text editing and system utilities.
TABLE OF CONTENTS The OpenVMS User's Guide, Second Edition
Appendix D: Communicating with Remote Computers
Overview
An increasingly important aspect of using computers is the capability to communicate over open networks. OpenVMS systems support optional layered networking software products such as TCP/IP (transmission control protocol/internet protocol) that permit users to communicate with other computer systems in open, worldwide networks.
Each computer connected to a TCP/IP network is called a host. Each host has a unique name and address (or host name). The local host is the computer you are logged on to, and the remote host is the computer with which you are communicating.
This appendix provides a summary of several TCP/IP applications supported by OpenVMS. Because the command syntax can vary slightly among vendors and be unfamiliar to you, alternative command syntax was developed jointly with the TCP/IP vendors for OpenVMS. Table D.1 lists the commonly used TCP/IP applications and the commands that will be described in this appendix.
D.1 Host Names
Each computer system attached to a TCP/IP network is identified by a unique IP host name as well as a unique IP host address. TCP/IP supplies a mechanism for translating the host name to the appropriate host address.
The IP host name is a component of hierarchically arranged host names, called a domain name (somewhat like an address on a letter with location, classification, and country codes). The syntax of a domain name is
[<span class="emphasis"><ihostname.subdomain.</i></span>]<span class="emphasis"><ilocation-name.classification-type</i></span>[.<span class="emphasis"><icountry-code</i></span>]
For example, a domain name might be TRUMPET.COMPUTING. SCHOOL.EDU and its corresponding IP address might translate to 103.180.5.5.
Table D.1: Common TCP/IP...
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