Data is transmitted around the Internet using a language or protocol known as the Transmission Control Protocol / Internet Protocol (TCP/IP). Each computer connected to the Internet has its own unique number called an IP address. Data is transmitted in data packets. Each packet contains the IP address of the destination computer and the IP address of the computer sending the data packet. The two computers can communicate and send data in this manner without data packets being lost along the way.
Local Area Networks behave in much the same manner as the Internet, although on a much smaller scale. In order for workstations to communicate with CMail Server correctly, TCP/IP must be installed and configured correctly.