Differences between revisions 16 and 17
Revision 16 as of 2011-07-19 02:38:30
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Editor: WenchaoWang
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Revision 17 as of 2011-07-24 15:08:04
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Editor: LorenKellogg
Comment: 1st Section: add commas for clarity, change "alike" to "the like".
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UDP is only a thin layer and provides not much more than the described UDP port multiplexing. UDP is only a thin layer, and provides not much more than the described UDP port multiplexing.
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Just like [[IP]], UDP also doesn't provide any mechanism to detect PacketLoss, DuplicatePackets and alike. Just like [[IP]], UDP doesn't provide any mechanism to detect PacketLoss, DuplicatePackets, and the like.

User Datagram Protocol (UDP)

The UDP layer provides datagram based connectionless transport layer (layer 4) functionality in the InternetProtocolFamily.

UDP is only a thin layer, and provides not much more than the described UDP port multiplexing.

Just like IP, UDP doesn't provide any mechanism to detect PacketLoss, DuplicatePackets, and the like.

There are a lot of protocols on top of UDP, including: BOOTP, DNS, NTP, SNMP, ...

UDP-Lite

Are you looking for Lightweight UDP? Then visit UDP-Lite.

History

XXX - add a brief description of UDP history

Protocol dependencies

  • IP: Typically, UDP uses IP as its underlying protocol. The assigned protocol number for UDP on IP is 17.

Example traffic

XXX - Add example traffic here (as plain text or Wireshark screenshot).

Wireshark

The UDP dissector is fully functional.

There are two statistical menu items for UDP available: Statistics/Endpoints which contains a tab showing all UDP endpoints (combination of IP address and UDP port) and Statistics/Conversations, which contains a tab showing all UDP conversations (combination of two endpoints).

Preference Settings

(XXX add links to preference settings affecting how UDP is dissected).

Example capture file

XXX - Add a simple example capture file. Keep it short, it's also a good idea to gzip it to make it even smaller, as Wireshark can open gzipped files automatically.

Display Filter

A complete list of UDP display filter fields can be found in the display filter reference

  • Show only the UDP based traffic:
     udp

Capture Filter

  • Capture only the UDP based traffic:
     udp

  • RFC768 User Datagram Protocol

Discussion

User_Datagram_Protocol (last edited 2011-07-24 15:08:04 by LorenKellogg)