Which of the following protocols uses both TCP and UDP?(a) FTP(b) SMTP(c) Telnet(d) DNSThis question was addressed to me in an international level competition.I would like to ask this question from TCP/IP Protocol topic in section Network Protocol of Wireless/Mobile

Which of the following protocols uses both TCP and UDP?(a) FTP(b) SMTP

1.	Which of the following protocols uses both TCP and UDP?(a) FTP(b) SMTP(c) Telnet(d) DNSThis question was addressed to me in an international level competition.I would like to ask this question from TCP/IP Protocol topic in section Network Protocol of Wireless/Mobile
Answer» Right CHOICE is (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.

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Which of the following protocols uses both TCP and UDP?(a) FTP(b) SMTP(c) Telnet(d) DNSThis question was addressed to me in an international level competition.I would like to ask this question from TCP/IP Protocol topic in section Network Protocol of Wireless/Mobile

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