This publication provides internetworking design and implementation information and helps you identify and implement practical internetworking strategies that are both flexible and scalable

This document introduces the various media-access methods, transmission methods, topologies, and devices used in a local-area network (LAN).

A Cisco document explaining what IP addresses are. [HTML/PDF]

This document provides basic information on how to configure a Cisco router for routing IP.

This page provides tips directly from Cisco's Technical Assistance Center (TAC) engineers to help you with Network Address Translation (NAT) issues.

Technical papers, FAQs, configuration and troubleshooting.

Ethernet history, topologies and physical layers.

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.

Cisco Secure Policy Manager is a scalable, powerful security policy management system for Cisco firewalls and Virtual Private Network (VPN) gateways. Assistance is also provided with the development and auditing of security policy.

Cisco configuration information on RIP