Computer Science · Computer Networks and Email Protocols
Match the email security protocol/command in Column I with its primary mechanism in Column II: Column I (i) SPF (ii) DKIM (iii) DMARC (iv) STARTTLS Column II (a) Cryptographic digital signature added to message headers (b) DNS-published list of authorised sending IP addresses (c) Policy specifying action on authentication failure (none/quarantine/reject) (d) Upgrades a plaintext SMTP connection to TLS encryption
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1(i)-b, (ii)-c, (iii)-a, (iv)-d
- 2(i)-a, (ii)-b, (iii)-c, (iv)-d
- 3(i)-d, (ii)-a, (iii)-c, (iv)-b
- 4(i)-b, (ii)-a, (iii)-c, (iv)-d✓
Correct answer
(i)-b, (ii)-a, (iii)-c, (iv)-d
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