1.In communication links, transmission rate means：A、BandwidthB、propagation speedC、process speedD、router delays正确答案： A 2.All communication activities in Internet are governed by:A、ProtocolsB、WebMasterC、ClientD、ChinaTelecom正确答案： A 3.The center of internet structure is:A、Tier-1 ISPsB、Local ISPsC、Root DNSD、NAP正确答案： A 4.When congest occur in network, which delay become large?A、propagation delayB、queuing delayC、transmission delayD、processing delay正确答案： B
