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