Internet Protocol Suite

The Internet Protocol Suite is the set of communications protocols used for the Internet and other similar networks. It is commonly also known as TCP/IP named from two of the most important protocols in it: the Transmission Control Protocol (TCP) and the Internet Protocol (IP), which were the first two networking protocols defined in this standard. Modern IP networking represents a synthesis of several developments that began to evolve in the 1960s and 1970s, namely the Internet and local area networks, which emerged during the 1980s, together with the advent of the World Wide Web in the early 1990s.

The Internet Protocol Suite consists of four abstraction layers. From the lowest to the highest layer, these are the Link Layer, the Internet Layer, the Transport Layer, and the Application Layer. The layers define the operational scope or reach of the protocols in each layer, reflected loosely in the layer names. Each layer has functionality that solves a set of problems relevant in its scope.

• Internet Protocol Suite [EN] @ Wikipedia
• Internet Protocol Suite [DE] @ Wikipedia

Overview

OSI Model	TCP/IP	Examples
Application Layer	Application Layer	HTTP, FTP, SMTP, LDAP, DHCP, DNS, SSH,
Presentation Layer
Session Layer
Transport Layer	Transport Layer	TCP, UDP, TLS/SSL,
Network Layer	Internet Layer	IP, IPsec, ICMP,
Data Link Layer	Link Layer	Ethernet, Token Ring, FDDI,
Physical Layer