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
- A.
TCP, UDP, UDP and TCP
- B.
UDP, TCP, TCP and UDP
- C.
UDP, TCP, UDP and TCP
- 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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