A. R edirect B. Source quen ch C. E cho rep ly D. destination:unreach able
A. sw itchportm odetag B. sw itchportrn ocletrunk C. trunkon D. setpotrun kon
A. In temalC on tro lM ailPro tO C O l B. In tranetC on tro lM essage Pro tocol C. In temetC onnection M esage Pro toco l D. In termetC on tro lM essage Protocol
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