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The underlying Transport layer protocol used by SMTP is ________

A. Tcp

B. Udp
C. Either TCP or udp
D. Imap

Explanation: TCP is a reliable protocol, and Reliability is a mandatory requirement in e-mail transmission using SMTP.

Occurrence: 0, System Administrator 2026

The underlying Transport layer protocol used by SMTP is ________ | Tcp | CSS, PMS, PPSC, FPSC, KPPSC, SPSC, ISSB and NTS Past Papers | Pakistan's Largest Online Past Papers Database

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