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TCP-IP
"TCP/IP" (acronym for "Transmission Control Protocol/Internet Protocol") usually refers to the entire family of protocols originally developed by the U.S. Department of Defence. The protocols were designed to connected different networks with each other.
Today, TCP/IP is used in many LANs and has become the foundation for the global Internet.
The IP handles data transmission (3rd layer in the OSI layer model), while the TCP handles delivery (4th level in the OSI layer model).
In addition to these protocols, there are additional protocols, such as, for example, UDP (acronym for "User Datagram Protocol"). UDP is analogous to TCP, but is not based on connections and it is a slow protocol if the connection is bad.").
ICMP (Internet Control Message Protocol) reports possible network disruptions to the sender.
Higher-level protocols (e.g., HTTP, FTP) are also considered part of the TCP/IP or DoD family.
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