... What is TCP & IP..????

* The Internet Protocol Suite (commonly known as TCP/IP) is the set of communications protocols used for the Internet and other similar networks.
* Transmission Control Protocol (TCP) and the Internet Protocol (IP), which were the first two networking protocols defined in this standard.
* The TCP/IP model consists of four layers :
I. the Link Layer
II. the Internet Layer
III. the Transport Layer
IV. The Application Layer
* Each layer solves a set of problems involving the transmission of data, and provides a well-defined service to the upper layer protocols based on using services from some lower layers.
* TCP/IP is included in all commercial UNIX systems, Mac OS X, and all free-software Unix-like systems such as Linux distributions and BSD systems, as well as all Microsoft Windows operating systems.
* The TCP/IP suite uses encapsulation to provide abstraction of protocols and services.
* Today's IP networking represents a synthesis of several developments that began to evolved in the 1960s and 1970s, namely the Internet and LANs (Local Area Networks), which emerged in the mid- to late-1980s, together with the advent of the World Wide Web in the early 1990s.