Question Detail Which protocol uses window flow system UDPTCPFTPNone of above Answer: Option B Similar Questions : 1. Which protocol deals with resolving domain names X-WindowSMTPDNSFTP Answer: Option C 2. ICMP works on which layer Physical LayerDatalink LayerNetwork layerTransport Layer Answer: Option C 3. Which protocol uses both TCP and UDP FTPSMTPTelnetDNS Answer: Option D 4. Which class is given wrong here ? CLASS A = 1 to 126CLASS B = 128 to 191CLASS C = 192 to 220CLASS D = 224 to 239 (Multicasting)CLASS E = 240 to 255 (Research) Answer: Option CExplanation:CLASS C is from 192 to 223 5. TCP/IP reference model contains how many layers 3467 Answer: Option BExplanation:TCP/IP reference model has four layer Application Layer Host to Host Internet Layer Network Access Read more from - TCP-IP Questions Answers