An intErnEt is A ComBinAtion oF nEtworks ConnECtED By ______. whEn A DAtAgrAm goEs From A sourCE to A ______, it will proBABly pAss mAny ______ until it rEAChEs thE routErAttAChED to thE DEstinAtion nEtwork.
A、routEr rECEivEs A ______ From A nEtwork AnD pAssEs it toAnothEr nEtwork.
A、routEr is usuAlly AttAChED to sEvErAl nEtworks. whEn it rECEivEs A pACkEt, towhiCh nEtwork shoulD it pAss thE pACkEt thE DECision is BAsED on optimizAtion: whiCh oF thEAvAilABlE ______ is thE optimum pAthwAy
A、pAthwAysB、routErs
C、DiAgrAms
D、CAlls