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This is a list of the IP protocol numbers found in the field Protocol of the IPv4 header and the Next Header field of the IPv6 header. It is an identifier for the encapsulated protocol and determines the layout of the data that immediately follows the header. Both fields are eight bits wide.
The first working version that was widely deployed was assigned version number 4. [10] A separate protocol based on reliable connections was developed and assigned version 5. IP version 7 was chosen in 1988 by R. Ullmann as the next IP version because he incorrectly assumed that version 6 was in use for ST-II.
Version: 4 bits The first header field in an IP packet is the Version field. For IPv4, this is always equal to 4. Internet Header Length (IHL): 4 bits The IPv4 header is variable in size due to the optional 14th field (Options). The IHL field contains the size of the IPv4 header; it has 4 bits that specify the number of 32-bit words in the header.
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Version: 4 bits This field is the Internet Protocol version number. Set to 4 to indicate IPv4. Internet Header Length (IHL): 4 bits This field is the length of outer IP header. Differentiated Services Code Point (DSCP): 6 bits This field is copied from the inner IP header. Explicit Congestion Notification (ECN): 2 bits This field is copied from ...
The header contains information about IP version, source IP address, destination IP address, time-to-live, etc. The payload of an IP packet is typically a datagram or segment of the higher-level transport layer protocol, but may be data for an internet layer (e.g., ICMP or ICMPv6) or link layer (e.g., OSPF) instead. Two different versions of IP ...
INTERNET MESSAGE ACCESS PROTOCOL - VERSION 4rev1: March 2003: IMAP v 4r1: RFC 3530 : Network File System (NFS) version 4 Protocol: April 2003: NFS v 4: RFC 3538 : Secure Electronic Transaction (SET) Supplement for the v1.0 Internet Open Trading Protocol (IOTP) June 2003 Internet Open Trading Protocol: RFC 3550 : RTP: A Transport Protocol for ...
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