The transport layer protocol used for real time multimedia, file transfer, DNS and e-mail respectively are
- A. TCP, UDP, UDP and TCP
- B. UDP, TCP, UDP and TCP
- C. UDP, TCP, TCP and UDP
- D. TCP, UDP, TCP and UDP
Answer: B. UDP, TCP, UDP and TCP
Explanation: Real-time multimedia requires low latency (UDP); file transfer requires reliable delivery (TCP); DNS queries are fast datagrams (UDP); email SMTP requires reliable transmission (TCP).