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Protocol Number Keyword Protocol References/RFC; 0x00 0 HOPOPT IPv6 Hop-by-Hop Option: RFC 8200: 0x01 1 ICMP Internet Control Message Protocol: RFC 792: 0x02 2 IGMP Internet Group Management Protocol: RFC 1112: 0x03 3 GGP Gateway-to-Gateway Protocol: RFC 823: 0x04 4 IP-in-IP IP in IP (encapsulation) RFC 2003: 0x05 5 ST Internet Stream Protocol ...
As ESP is an encapsulation protocol, a value of 4 is also possible, indicating IP in IP. A value of 41 indicates IPv6 encapsulated in IPv4 , e.g. 6to4 . The value 59 (meaning: No Next Header ) is used for dummy packets, which may be inserted in the stream, and which contents should be discarded.
Establishment of Encapsulating Security Payload (ESP) communication in transport mode. The IP protocol number for ESP is 50 (compare TCP's 6 and UDP's 17). At this point, a secure channel has been established, but no tunneling is taking place. Negotiation and establishment of L2TP tunnel between the SA endpoints.
The Point-to-Point Tunneling Protocol (PPTP) is an obsolete method for implementing virtual private networks. PPTP has many well known security issues. PPTP has many well known security issues. PPTP uses a TCP control channel and a Generic Routing Encapsulation tunnel to encapsulate PPP packets.
Internet Open Trading Protocol (IOTP) HTTP Supplement September 2000 Internet Open Trading Protocol: RFC 2974 : Session Announcement Protocol: October 2000: SAP: RFC 3504 : Internet Open Trading Protocol (IOTP), Version 1, Errata March 2003 Internet Open Trading Protocol: RFC 3022 : Traditional IP Network Address Translator (Traditional NAT ...
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.
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Explicit Congestion Notification (ECN) is an extension to the Internet Protocol and to the Transmission Control Protocol and is defined in RFC 3168 (2001). ECN allows end-to-end notification of network congestion without dropping packets.