=====datacomm Keyword 1=====
VoIP. Voice overlay Internet Proticol

====Definition====
a system and internet proticol that allows to transmite and receive human voice form one place to another much like the telephone which is analog but in order to use it via computer and the interwebs you need to digitize the sound wave length, tone and pitch of a human voice then transmit via the VoIP system which im not intirely sure of all that happens.

====References====

  * Astrisk pbx
  * Astrisk pbx wikipedia
  * netcat
  * netcat wikipedia
  * VoIp Wikipedia
  * Google chat
  * Skype
  * Google chat wikipedia
  * skype wikipedia

=====datacomm Keyword 1 Phase 2=====
MAC Address


Arp
====Definition====
Mac address is the physical address put into and on a computer for its entire life this is not an IP which can be change no a Mac Adress is hard coded into the computer or networking device to reference it for future service such as allocating an ip to a network on the computer on either a WAN or a LAN.
Media access control address ussaly given in a hexidecimal form


How to Find a Mac Address on a Windows XP Desktop 
PC or a Notebook PC
• Click on START, and then click on RUN
• The RUN dialogue box will appear. Type CMD and press ENTER
• A DOS window will appear. This is also commonly called a Command Prompt
• Now type IPCONFIG /ALL at the command prompt and hit ENTER. This window will now display the configuration of all of your network adapters. If you have multiple network adapters in your PC you'll see multiple addresses. The MAC Address you're looking for will be listed under the heading Ethernet Adapter Wireless Network Connection
• Now look for the Physical Address. It should look something like 00-50-BA-D1-BA-71
• To close the window when you are finished, type EXIT at the command prompt and hit the ENTER key
====References====
List any sites, books, or sources utilized when researching information on this topic. (Remove any filler text).

  * Cisco fundementals class (yes that taught us what a mac adress was origenaly)
  * Lan routers and switch board interfaces ask this qeustion
  * Wikipedia mac addresses
  * http://www.smallbusinesscomputing.com/webmaster/article.php/3459411/Whats-a-MAC-Address-and-How-Do-You-Find-It.htm


====Demonstration====
Demonstration of the indicated keyword.

If you wish to aid your definition with a code sample, you can do so by using a wiki **code** block, an example follows:

<code c>
/*
 * Sample code block
 */
#include <stdio.h>

int main()
{
    return(0);
}
</code>

Alternatively (or additionally), if you want to demonstrate something on the command-line, you can do so as follows:

<cli>
lab46:~$ cd src
lab46:~/src$ gcc -o hello hello.c
lab46:~/src$ ./hello
Hello, World!
lab46:~/src$ 
</cli>