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The pseudo header conceptually prefixed to the UDP header contains the source address, the destination address, the protocol, and the UDP length. This information gives protection against misrouted datagrams.
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www.faqs.org/rfcs/rfc768.html
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The User Datagram Protocol (UDP), defined by IETF RFC768, provides a simple, but unreliable message service for transaction-oriented services. Each UDP header carries both a source port identifier and destination port identifier, allowing high-level protocols to target specific applications ... UDP header structure...
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www.protocols.com/pbook/tcpip2.htm
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In our last issue we took a look at the layer 3 or IP header of TCP/IP packets (you can see that issue here: Securitypronews.com - 11.06). This issue will involve a very similar discussion with the difference being that we will be looking at the layer 4 (or TCP or UDP) header construction.
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www.securitypronews.com/2001/1115.html
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Checksum - bit 48-63. The checksum is the same kind of checksum as used in the TCP header, except that it contains a different set of data. In other words, it is a one's complement of the one's complement sum of parts of the IP header, the whole UDP header, theUDP data and padded with zeroes at the end when necessary.
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security.maruhn.com/iptables-tutorial/x980.html
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User Datagram Protocol - Wikipedia, the free encyclopedia
The User Datagram Protocol ( UDP ) is one of the core members of the Internet Protocol Suite, the set of network protocols used for the Internet. With UDP, computer applications can send messages,...
en.wikipedia.org/wiki/User_Datagram_Protocol
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(TTL) 8-bit protocol 16-bit header checksum 20 bytes; UDP Header data (if any); 16-bit source port number 16-bit destination port number; 16-bit UDP length 16-bit UDP checksum; 8 bytes; TCP Header; 32-bit sequence number;
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www.utdallas.edu/~cantrell/ee6345/pocketguide.pdf
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ICMP, TCP, UDP Packet Headers Analysis ... Checksum :- Checksum is the 16-bit one's complement of the one's complement sum of a pseudo header of information from the IP header, the UDP header, and the data, padded with zero octets at the end (if necessary) to make a multiple of two octets.
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www.insecure.in/packet_header_analysis.asp
www.insecure.in/packet_header_analysis.asp
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Comparative analysis - TCP Vs. UDP ... It is described in STD-6/RFC-768 and provides a connectionless host-to-host communication path. UDP has minimal overhead:; each packet on the network is composed of a small header and user data. It is called a UDP datagram.
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www.laynetworks.com/Comparative%20analysis_TCP%20Vs%20U...
www.laynetworks.com/Comparative%20analysis_TCP%20Vs%20UDP.htm
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Network Working Group M. Degermark, Editor Request for Comments: 3096 University of Arizona Category: Informational July 2001 Requirements for robust IP/UDP/RTP header compression Status of this Memo This memo provides information for the Internet community.
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www.ietf.org/rfc/rfc3096.txt
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