NT TCP Support for RFC 1122 Handle Urgent Data

by Wayne Maples [Published on 20 April 2004 / Last Updated on 20 April 2004]

Hive: HKEY_LOCAL_MACHINE
Key: System\CurrentControlSet\Services\VxD\MSTCP
Name: PMTUDiscovery
Type: REG_DWORD
Value: 1 default = RFC 1122

A value of 0 specifies that Microsoft TCP/IP is to treat urgent data the way many UNIX systems do.

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