The diagnostic tool then tests {HEAD ~ the connectivity} from the computer to {TAIL ~ a selected network entity}, and the status of the connectivity is graphically displayed 
to
The diagnostic tool then tests { HEAD ~ the connectivity } from the computer to { TAIL ~ a selected network entity } , and the status of the connectivity is graphically displayed
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH