|TCP option 9, Partial Order Connection permitted|
|Protocol type:||Transport layer protocol.|
|Option length:||2 bytes.|
|Links:||IANA: TCP option numbers.|
A service which allows partial order delivery and partial reliability is one which requires some, but not all objects to be received in the order transmitted while also allowing objects to be transmitted unreliably (i.e., some may be lost).
The realization of such a service requires, (1) communication and/or negotiation of what constitutes a valid ordering and/or loss-level, and (2) an algorithm which enables the receiver to ascertain the deliverability of objects as they arrive. These issues are addressed here - both conceptually and formally - summarizing the results of research and initial implementation efforts.
|MAC header||IP header||TCP header||TCP option 9||Data|
TCP Option 9:
Kind. 8 bits. Set to 9.
Length. 8 bits. Set to 2.
[RFC 1693] An Extension to TCP : Partial Order Service.