Protocols

= Protocols = media type="file" key="Protocol.MP3" A** protocol ** in the communications world, is simply a system of digital message formats and rules for exchanging messages in or between computing system. Protocols exist at several levels in a connection. For example, there are protocols for the data interchange at the hardware device level and protocols for data interchange at the software program level.


 * Examples:**

There are various types of protocols, but the most common examples of protocols are some that we come across every day - The Transmission Control protocol (TCP), and The Internet Protocol (IP)

TCP/IP is the often used combination of the two and describes the set of protocols that allows hosts to connect to the Internet. The two layers of TCP/IP are defined by the separate spelled-out versions. Transmission Control Protocol is the top layer; the one that converts messages or files into data packets that are transmitted over the network connection to the destination computer and then reassembled into messages or files that can be read by the destination user. The lower layer of TCP/IP, Internet Protocol, provides the transmitting operation, configuring the connection's address so that the information gets to the right place. IP could function without TCP, although it would be idle, but the reverse is not possible.

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