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

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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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(C) UDP, TCP, UDP and TCP

Real time multimedia needs connectionless service, so under lying transport layer protocol used is UDP

File transfer rums over TCP protocol with port no-21

DNS runs over UDP protocol within port no-53

Email needs SMTP protocol which runs over TCP protocol within port no – 25

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