A computer network diagnostic tool allows {HEAD ~ a user} of a computer coupled to a computer network to perform {TAIL ~ network diagnostics} 
to perform
A computer network diagnostic tool allows { HEAD ~ a user } of a computer coupled to a computer network to perform { TAIL ~ network diagnostics }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL