Troubleshooting tips and other useful information

First let me start by saying I wish everyone a Healthy and Prosperous 2010. While reading through my emails this morning I came across an email from http://techrepublic.com.com/ that had several wonderful articles, and out of those I pulled out a few useful gems that I believe can benefit anyone starting out in IT.

How Does Ping Really Works?

http://images.globalknowledge.com/wwwimages/whitepaperpdf/WP_Mays_Ping.pdf

The OSI Model Understanding the Seven Layers of Computer Networks

http://images.globalknowledge.com/wwwimages/whitepaperpdf/WP_Simoneau_OSIModel.pdf

IP Addressing and Subnetting for New Users

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00800a67f5.shtml

12 Things to know when troubleshooting your network

http://images.globalknowledge.com/wwwimages/whitepaperpdf/WP_Tolani_12TipsTroubleshooting_P1.pdf

TCP/IP Sluething Troubleshooting TCP/IP Using Your Toolbox

http://images.globalknowledge.com/wwwimages/whitepaperpdf/WP_Rohling_TCP-IP.pdf

Router Essentials

http://images.globalknowledge.com/wwwimages/whitepaperpdf/WP_Tolani_RouterEssentials_P1.pdf

Network Security Checklist

http://www.dell.com/downloads/global/solutions/network_sec_checklist.pdf