Internetwork Design Guide - This publication provides internetworking design and implementation information and helps you identify and implement practical internetworking strategies that are both flexible and scalable
Multilayer Switching Reference Guide - This reference provides the information needed to understand the terminology associated with multilayer switching products.
Introduction to LAN Protocols - This document introduces the various media-access methods, transmission methods, topologies, and devices used in a local-area network (LAN).
Overview of Routing between Virtual LANs - This document provides an overview of virtual LANs (VLANs). It describes the encapsulation protocols used for routing between VLANs and provides some basic information about designing VLANs.
Howstuffworks "How LAN Switches Work" - LAN switches are an important part of the Internet's infrastructure. Learn how LAN switches work and how they improve network performance.
Howstuffworks "How Routers Work" - Routers are such a vital component of the Internet that the Internet literally could not exist without them. Find out exactly how routers work and why they are so important!
Cisco - QoS Technical Tips - Provides tips directly from Cisco's Technical Assistance Center (TAC) engineers to help you with Quality of Service (QoS) issues.
Cisco IP Routing - Technologie overview about BGP, EIGRP, IGRP, IS-IS, OSPF and RIP.
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