The transport layer protocols used for real time multimedia, file transfer,…

20132013

The transport layer protocols used for real time multimedia, file transfer, DNS and email, respectively are

Answer: C. UDP, TCP, UDP and TCP — Answer: UDP, TCP, UDP and TCP Real-time multimedia: UDP — chosen for low latency and reduced overhead; occasional packet loss is acceptable for voice/video.…

  1. A.

    TCP, UDP, UDP and TCP

  2. B.

    UDP, TCP, TCP and UDP

  3. C.

    UDP, TCP, UDP and TCP

  4. D.

    TCP, UDP, TCP and UDP

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Correct answer: C

Answer: UDP, TCP, UDP and TCP

  • Real-time multimedia: UDP — chosen for low latency and reduced overhead; occasional packet loss is acceptable for voice/video.

  • File transfer: TCP — provides reliable, ordered delivery and retransmission, which are important for transferring files intact.

  • DNS: UDP — most DNS queries and responses fit in a single UDP datagram for efficiency; TCP is used for zone transfers or when responses are too large.

  • Email: TCP — protocols like SMTP, IMAP and POP3 need reliable, connection-oriented communication provided by TCP.

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