700-551 · Question #74
Which are two attack vectors protected by DNS-Layer security? (Choose two.)
The correct answer is B. Webmail D. E-mail. Webmail (B) and E-mail (D) are correct because DNS-layer security intercepts malicious DNS queries before a connection is established - and both webmail and email are primary attack vectors where users click phishing links or access malicious domains that trigger DNS lookups…
Question
Which are two attack vectors protected by DNS-Layer security? (Choose two.)
Options
- AMobile
- BWebmail
- CCloud technology
- DE-mail
- EVoicemail
How the community answered
(45 responses)- A4% (2)
- B93% (42)
- E2% (1)
Explanation
Webmail (B) and E-mail (D) are correct because DNS-layer security intercepts malicious DNS queries before a connection is established - and both webmail and email are primary attack vectors where users click phishing links or access malicious domains that trigger DNS lookups, which can then be blocked at the DNS layer.
Why the distractors are wrong:
- A. Mobile is a device/platform, not an attack vector - DNS security can run on mobile devices but mobile itself isn't the threat channel the question is targeting.
- C. Cloud technology is infrastructure/delivery model, not an attack vector DNS-layer security is specifically designed to counter.
- E. Voicemail attacks (vishing) operate over phone networks and do not rely on DNS resolution, so DNS-layer security offers no protection there.
Memory tip: Think "DNS blocks domains" - the two correct answers (webmail and email) both involve users clicking links that generate DNS queries. If the attack method doesn't require a DNS lookup to reach a malicious destination, DNS-layer security can't stop it.
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