Which protocol or service uses UDP for a client-to-server communication and TCP for server-to-server communication?

Which protocol or service uses UDP for a client-to-server communication and TCP for server-to-server communication?

  • DNS
  • HTTP
  • FTP
  • SMTP
    Answers Explanation & Hints:

    Some applications may use both TCP and UDP. DNS uses UDP when clients send requests to a DNS server, and TCP when two DNS serves directly communicate.

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