When using Windows XP and previous operating systems one could easily send messages from one computer to another by using the "Net Send" command from the command prompt. Typing a command like this:

Net send Support "Please contact help desk immediately!"

Would result in the computer searching for the location where the user Support has last logged on, or in case of a computer, where the computer called Support is listed, and would send that message to that user or computer. You should note that this method of sending messages was made available by the Messenger service running on the target machine. Without it, there could be no messages transmitted to that computer.

Note: Windows XP SP1 (or was it SP2? I can't remember right now) disabled the Messenger service by default. So does Windows Server 2003 SP1.

Long story made short, when using Windows Vista one might go looking for the "Net send" in Vista and wonder where it went. There is NO "Net send" command in Vista… However, there is a solution. You can use MSG.EXE instead.

Note: Apparently Windows Vista Home Basic and Home Premium editions do not have the msg.exe command installed. It does work on Vista Business, Enterprise or Ultimate edition.

Click on the Start button, type CMD in the search box and press Enter.

If you are on cable and have the connection running from the back of the modem to the ethernet port then leave it plugged up and click go. It will automatically detect your connection name. If you have your connection running thru a router then unplug it and plug your connection directly from your modem to your ethernet adapter. DHCP will not work on routers, however it is worth a shot because these instructions were for v1.0 and the app provided is v1.4. Sometimes it will not change your ip at all depending on your isp.

A handy network software that will monitor your bandwidth
NetMeter can be considered a small, yet comprehensive and customizable network bandwidth monitoring application. Realtime bandwith monitoring was never easier.

Network+ is a certification that attempts to measure skill as a network technician: understanding of network hardware, installation, and troubleshooting.
Topics include network hardware, connections, software, and different protocols used in local area networks (LANs) and wide area networks (WANs). Network+ prepares one for continuing to Microsoft certifications and Cisco certifications.

A Microsoft Certified Systems Engineer (MCSE) is a person who is certified by Microsoft to work with networking concepts and operation systems.
This is a course for professionals who examine and investigate company needs and then design, install, configure and troubleshoot networking systems. MCSE certification is suitable for professionals who work as technical support engineers, system analysts, network analysts and technical consultants.

CCNA certification is a first-level Cisco Career certification and indicates a foundation in and apprentice knowledge of networking. CCNA certification validates the ability to install, configure, operate, and troubleshoot medium-size routed and switched networks, including implementation and verification of connections to remote sites in a WAN. The certification is obtained through 80 hours of Cisco certified training (ICND1 and ICND2) as well as passing the 640-802 exam for the certification.