The custom server performs {HEAD ~ test cases} and saves test results of {TAIL ~ the test case}, which the custom server communicates back to the execution server 
The custom server performs { HEAD ~ test cases } and saves test results of { TAIL ~ the test case } , which the custom server communicates back to the execution server
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH