How to tell if one transaction corresponds to one call of the web service or to one start/destination combination

Product Feature: Get Travel Boundary

Version: 7,8,9
 
One transactions corresponds to one call of the web service for this particular case.

To be more specific, one transaction corresponds to one row in the request message (or response depending on the contract).

Since all start/end points are part of the same input/output row, it is counted as one transaction.
UPDATED:  March 28, 2017