TRANSPORT LAYER
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The transport layer protocols used for real time multimedia, file transfer, DNS and email, respectively are:
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TCP, UDP, UDP and TCP
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UDP, TCP, TCP and UDP
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UDP, TCP, UDP and TCP
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TCP, UDP, TCP and UDP
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Explanation:
Detailed explanation-1: -UPD is used for real time multimedia, DNS and TCP is used for e-mail.
Detailed explanation-2: -DNS uses TCP for Zone transfer and UDP for name, and queries either regular (primary) or reverse. UDP can be used to exchange small information whereas TCP must be used to exchange information larger than 512 bytes.
Detailed explanation-3: -UDP is used where real-time quick communication is crucial, and losing a few frames/packets in the process is acceptable. Non-real time communication most often uses TCP (Transmission control Protocol) as it is well established, provides packet ordering, retransmissions, and prevents packet loss.
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