TheInternetisbasedonconnectionlessend-to-endpacketservice,whichtraditionallyprovidedbest-effortmeansofdata()usingtheTransmissionControlProtocol/InternetProtocolSuite.Althoughthe()designgivestheInternetitsflexibilityandrobustness,itspacketdynamicsalsomakeitpronetocongestionproblems,especiallyat()thatconnectnetworksofwidelydifferentbandwidths.TheinitialQoSfunctionsetwasforinternethosts.Onemajorproblemwithexpensivewide-area()linksistheexcessiveoverheadduetosmallTransmissionControlProtocolpacketscreatedbyapplicationssuchastelnetandrlogin.TheNagle(请作答此空)，whichsolvesthisissue,isnowsupportedbyallIPhostimplementations.
A.technology B.problem C.structure D.algorithm正确答案D
