Question Detail Which protocol uses both TCP and UDP FTPSMTPTelnetDNS Answer: Option D Ad Similar Questions : 1. Telnet allows user to connect client machinetransferring filessharing filesnone of above Answer: Option A 2. Which company developed TCP/IP protocol for networking IBMDECDARPAXerox Answer: Option C 3. Which IP is reserved for loopback testing 192.168.0.010.255.255.255255.0.0.0None of above Answer: Option DExplanation:127.0.0.1 is reserved for loopback testing 4. Which layer will be used while transmitting data using FTP or Telnet PresentationApplicationSessionTransport Answer: Option B 5. 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 Read more from - TCP-IP Questions Answers