350-701 Content Security Practice Question
To protect against phishing attacks that use fraudulent emails to trick users into revealing credentials, which email authentication technology verifies the sending domain's DNS records for a digital signature?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
DKIM
DKIM (DomainKeys Identified Mail) uses a digital signature to verify that an email originated from the claimed domain. SPF (Sender Policy Framework) verifies the sending IP address against authorized IP lists but does not use a digital signature. DMARC builds on both SPF and DKIM. Therefore, the correct answer is D.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
DMARC
Why it's wrong here
DMARC uses SPF and DKIM results to determine policy.
- ✗
SenderBase
Why it's wrong here
SenderBase is a reputation service, not an email authentication method.
- ✗
SPF
Why it's wrong here
SPF verifies the sending IP address, not a digital signature.
- ✓
DKIM
Why this is correct
DKIM adds a digital signature to the email header, verified via DNS.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-701 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-701 exam.