Some Command Prompt Commands: ipconfig, ipconfig /all, ping, net, tracert, nslookup

ipconfig - information about your network configuration
ipconfig /all - detailed information about your network configuration
ping - know if a DNS server is up on your network (internet) and if you are able to comunicate with that DNS server
net - specific for windows networking
tracert - presents the routers between you and a website
nslookup - presents the ip addresses of a website

A Well Illustrated Guide for First Steps with Wireshark

This is a well illustrated guide to Wireshark network protocol analyzer. You can find a list of sample captures  to analyze with Wireshark. This guide also presents about following a TCP stream of a packet, this way analyzing the conversation and the packets sent between you and a particular location on the internet.

Introduction to Wireshark

Wireshark is a analyzing tool for what goes through your network connection (implicitly internet connection). Wireshark analyzes at the packet level. This analyzer can be used for troubleshooting internet connections, for security reasons to see if somebody tries to invade your system or by developers for debugging.

In this introduction you can see how to make visible only http packets and look for some of information about them. Of course you can filter other packets too. You may consider trying Wireshark when visiting http://myinterestsinit.blogspot.com/.

The Similarity Between Virtualization and How Hard Disk Is Controlled by the RAID Controller

There is a similarity between virtualization and how hard disk is controlled by RAID controller. The hypervisor for the virtual environment is like a RAID controller for the hard disk system. Here you can get an idea about what server virtualization means.

Communication Skills for IT Support

Communication is must-have for a troubleshooter. Listening to the person who's equipment you troubleshoot is very important. You will be amazed how much you can learn just listening.

Easy to Understand Introduction to Networking

This is a very easy to understand lesson about networking. What is a network? What is a protocol? What is peer to peer network? What is client-server network? What is a domain controller? A bit about job roles. And network models like Personal Area Network (PAN), Local Area Network (LAN), Metropolitan Area Network (MAN), Campus Area Network (CAN) and Wide Area Network (WAN) like Internet.