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The protocols in use today in this layer for the Internet all originated in the development of TCP/IP. In the OSI model the transport layer is often referred to as Layer 4, or L4, [2] while numbered layers are not used in TCP/IP. The best-known transport protocol of the Internet protocol suite is the Transmission Control Protocol (TCP).
This article lists protocols, categorized by the nearest layer in the Open Systems Interconnection model.This list is not exclusive to only the OSI protocol family.Many of these protocols are originally based on the Internet Protocol Suite (TCP/IP) and other models and they often do not fit neatly into OSI layers.
Integrated Net Layer Security Protocol: TUBA 0x35 53 SwIPe SwIPe: RFC 5237: 0x36 54 NARP NBMA Address Resolution Protocol: RFC 1735: 0x37 55 MOBILE IP Mobility (Min Encap) RFC 2004: 0x38 56 TLSP Transport Layer Security Protocol (using Kryptonet key management) 0x39 57 SKIP Simple Key-Management for Internet Protocol: RFC 2356: 0x3A 58 IPv6 ...
The three top layers in the OSI model, i.e. the application layer, the presentation layer and the session layer, are not distinguished separately in the TCP/IP model which only has an application layer above the transport layer. While some pure OSI protocol applications, such as X.400, also combined them, there is no requirement that a TCP/IP ...
Layer 4: transport layer [ edit ] The connection-mode and connectionless-mode transport services are specified by ITU-T Rec. X.214 [ISO/IEC 8072] ; the protocol that provides the connection-mode service is specified by ITU-T Rec. X.224 [ISO/IEC 8073] , and the protocol that provides the connectionless-mode service is specified by ITU-T Rec. X ...
Hypertext Transfer Protocol (HTTP/1.1): Authentication: June 2014: HTTP v1.1: Obsoletes 2616 RFC 7252 : Constrained Application Protocol (CoAP) June 2014: Constrained Application Protocol: RFC 7301 : Transport Layer Security (TLS): Application-Layer Protocol Negotiation Extension: July 2014: Application-Layer Protocol Negotiation: RFC 7348
They use one of two transport layer protocols: the Transmission Control Protocol (TCP) or the User Datagram Protocol (UDP). In the tables below, the "Transport" column indicates which protocol(s) the transfer protocol uses at the transport layer. Some protocols designed to transmit data over UDP also use a TCP port for oversight.
IPX and SPX are derived from Xerox Network Systems' IDP and SPP protocols respectively. IPX is a network-layer protocol (layer 3 of the OSI model), while SPX is a transport-layer protocol (layer 4 of the OSI model). The SPX layer sits on top of the IPX layer and provides connection-oriented services between two nodes on the network.