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Wireless Mobile Communications
Tcp Ip Protocol
Q
Which of the following protocols uses both TCP and UDP?
AA. FTP
BB. SMTP
CC. Telnet
DD. DNS
Correct Answer:
D. D. DNS
Explanation:
DNS and some other services work on both TCP and the UDP protocols. DNS uses TCP for zone exchanges between servers and UDP when a client is trying to resolve a hostname to an IP address.