[Sis-csi] Text for Transport Layer Section

[Scott Burleigh]

Lloyd Wood wrote:

> " CFDP can run over TCP"
>
> has anyone ever used CFDP over TCP?

I believe a TCP "UT layer" adapter for CFDP has been built and tested at 
JPL, but I'm pretty sure it's never been used in any operational sense.  
Unacknowledged CFDP over TCP isn't quite as outlandish a stack as it 
might seem: TCP assures the in-order data arrival that the CFDP 
procedures rely on (which on rare occasions produces some surprising 
behavior in acknowledged CFDP over UDP), and the file fragmentation and 
reassembly, record boundary detection and preservation, and metadata 
features of CFDP are as useful in unacknowledged mode as they are in 
acknowledged mode.

Scott