data begins on 32 bit word boundary. The padding is zero.
Protocol In this document, the next higher level protocol identifier, an internet header field.
Rest The local address portion of an Internet Address.
Source The source address, an internet header field.
TCP Transmission Control Protocol: A host-to-host protocol for reliable communication in internet environments.
TCP Segment The unit of data exchanged between TCP modules (including the TCP header).
TFTP Trivial File Transfer Protocol: A simple file transfer protocol built on UDP.
Time to Live An internet header field which indicates the upper bound on how long this internet datagram may exist.
TOS Type of Service
Total Length The internet header field Total Length is the length of the datagram in octets including internet header and data.
TTL Time to Live
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September 1981 Internet Protocol Glossary
Type of Service An internet header field which indicates the type (or quality) of service for this internet datagram.
UDP User Datagram Protocol: A user level protocol for transaction oriented applications.
User The user of the internet protocol. This may be a higher level protocol module, an application program, or a gateway program.
Version The Version field indicates the format of the internet header.
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September 1981 Internet Protocol
REFERENCES
[1] Cerf, V., "The Catenet Model for Internetworking," Information Processing Techniques Office, Defense Advanced Research Projects Agency, IEN 48, July 1978.
[2] Bolt Beranek and Newman, "Specification for the Interconnection of a Host and an IMP," BBN Technical Report 1822, Revised May 1978.
[3] Postel, J., "Internet Control Message Protocol - DARPA Internet Program Protocol Specification," RFC792, USC/Information Sciences Institute, September 1981.
[4] Shoch, J., "Inter-Network Naming, Addressing, and Routing," COMPCON, IEEE Computer Society, Fall 1978.
[5] Postel, J., "Address Mappings," RFC796, USC/Information Sciences Institute, September 1981.
[6] Shoch, J., "Packet Fragmentation in Inter-Network Protocols," Computer Networks, v. 3, n. 1, February 1979.
[7] Strazisar, V., "How to Build a Gateway", IEN 109, Bolt Beranek and Newman, August 1979.
[8] Postel, J., "Service Mappings," RFC795, USC/Information Sciences Institute, September 1981.
[9] Postel, J., "Assigned Numbers," RFC790, USC/Information Sciences Institute, September 1981.
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