ULTRIX-32 Guide to Networking

This document, the "ULTRIX-32 Guide to Networking" (Version 3.0, 1987/1988) by Digital Equipment Corporation, provides comprehensive information for setting up, configuring, and maintaining Local Area Networks (LANs) on the ULTRIX-32 operating system.

It is primarily aimed at system and network managers who are responsible for ULTRIX-32 networks and are familiar with its commands and basic networking.

The guide is divided into two main parts:

1. Overview of Local Area Networks: This section introduces fundamental concepts such as LAN components, Internet address formats (Class A, B, C), Internet broadcast addresses, and routing decisions, including the use of gateways and subnet routing. It also details the various system files (/etc/hosts, /etc/networks, /etc/inetd.conf, etc.) crucial for network operation and lists key network maintenance commands (arp, ifconfig, netstat).
2. Setting Up a Local Area Network: This part provides practical, step-by-step procedures for configuring and updating network environments. It covers adding systems to existing LANs, establishing new LANs, setting up Internet networks with gateways, and implementing subnet routing, primarily utilizing the netsetup command and manual file modifications.

The document serves as a practical manual for managing ULTRIX-32 based network infrastructures, detailing both conceptual understanding and hands-on configuration.