Penguin
Annotated edit history of URG version 4, including all changes. View license author blame.
Rev Author # Line
1 CraigBox 1 A flag set in a [TCP] header to define that the packet contains __URG__ent data.
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4 StuartYeates 3 Contrary to popular belief this is not used in QualityOfService, but is used to tell a TCP reciever that there is urgent data further along the stream so they may wish to drop all data until it's recieved (for instance). Very few protocols use this feature, telnet(1) being basically the only one I am aware of.
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6 CategoryNetworking