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