This " Free, Lecture-Based Presentation on IP Addressing and Subnetting" was created to teach computer professionals how to address IP networks and perform subnetting.  Subnetting is one of the most difficult activities network technicians are required to perform.  Many people have found viewing these presentations multiple times increases understanding.  Use these methods for success:

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This Open Source Guide is about DNS and (mostly) BIND 9.x on Linux (Fedora Core), BSD's (FreeBSD, OpenBSD and NetBSD) and Windows (Win 2K, XP, Server 2003). It is meant for newbies, Rocket Scientist wannabees and anyone in between.

This Guide was born out of our first attempts a number of years ago at trying to install a much needed DNS service on an early Redhat Linux system. We completed the DNS 'rite of passage' and found it a pretty unedifying and pointless experience.

1. Boilerplate and Terminology
2. DNS - Overview
3. DNS Reverse Mapping

This document is designed to give the reader a reasonable working knowledge of TCP/IP subnetting, addressing, and routing. It is not intended to be complete, or to cover all issues. This is targeted toward LAN administrators just moving to TCP/IP, however it should help anyone who wants to know a little (more) about how TCP/IP works. This document does not, generally, apply to dial-up SLIP/PPP connections.

1. Introduction
2. What are TCP/IP and the Internet?

2.1. The Evolution of TCP/IP (and the Internet)
2.2. Internet Growth
2.3. Internet Administration
2.4. Domain Names and IP Addresses (and Politics)

3. The TCP/IP Protocol Architecture

3.1. The Network Interface Layer
3.1.1. PPP
3.2. The Internet Layer
3.2.1. IP Addressing and Subnet Masks
3.2.2. Conserving IP Addresses: CIDR, DHCP, NAT, and PAT
3.2.3. The Domain Name System
3.2.4. ARP and Address Resolution

Table of Contents

1  Introduction  
2  TCP/IP Overview 
3  Ethernet  
4  ARP  
5  Internet Protocol
6  User Datagram Protocol 
7  Transmission Control Protocol
8  Network Applications 
9  Other Information 
10  References 
11  Relation to other RFCs 
12  Security Considerations 
13  Authors' Addresses 

This RFC is a tutorial on the TCP/IP protocol suite, focusing particularly on the steps in forwarding an IP datagram from source