CCNA Network Services and Security Practice Question
Why is multifactor authentication generally stronger than password-only access?
⚠ Common exam trap
A common exam trap is selecting options that overstate MFA’s capabilities, such as assuming it guarantees immunity to phishing or replaces encryption. MFA reduces risk but does not eliminate all attack vectors, and it does not substitute for encryption protocols that protect data in transit. Another trap is confusing authentication with authorization; MFA strengthens authentication but does not remove the need for proper authorization policies. Recognizing these distinctions is critical to avoid incorrect answers that exaggerate MFA’s role or misunderstand its function in network security.
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
✓
It relies on more than one authentication factor.
MFA combines independent factors, so compromise of one factor does not automatically grant access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It removes the need for authorization policies.
Why it's wrong here
MFA is an authentication mechanism that happens before authorization, but it does not define or enforce what an authenticated user is allowed to do. Authorization policies, such as role-based access control (RBAC), ACLs, or attribute-based policies, determine the specific resources and actions available to a user. Even with MFA enforced, a user must still be explicitly granted permissions; MFA cannot replace the job of authorization.
When this WOULD be correct
In a different exam question asking about the benefits of simplifying security protocols, an option stating that MFA removes the need for authorization policies could be correct if the context implies a scenario where MFA is used to streamline access control, reducing reliance on complex policies.
- ✓
It relies on more than one authentication factor.
Why this is correct
Multifactor authentication (MFA) is stronger because it requires the user to present at least two independent authentication factors, typically from the categories of knowledge (something you know, e.g., a password), possession (something you have, e.g., a smart card or OTP token), and inherence (something you are, e.g., a fingerprint). By combining factors, an attacker must compromise multiple distinct mechanisms, which dramatically reduces the likelihood of successful unauthorized access compared to relying on a single factor that could be stolen, guessed, or reused.
- ✗
It guarantees that credentials can never be phished.
Why it's wrong here
While MFA significantly reduces the risk of credential theft, it does not provide absolute protection against all phishing techniques. Adversaries can perform real-time phishing using adversary-in-the-middle (AiTM) proxies to relay authentication tokens, trick users into approving push notifications in MFA fatigue attacks, or combine phishing with stolen session cookies. Therefore, MFA lowers the attack surface but cannot guarantee that credentials—or the resulting authenticated sessions—will never be compromised.
When this WOULD be correct
In a different exam scenario, a question might ask if multifactor authentication completely prevents phishing attacks. In this context, an answer stating that it guarantees credentials can never be phished could be deemed correct if the question implies that the presence of multiple factors significantly mitigates the risk.
- ✗
It replaces encryption on the network.
Why it's wrong here
Authentication and encryption serve separate purposes in network security. MFA verifies the identity of a user or device, while encryption protects the confidentiality and integrity of data as it traverses the network, often using protocols like TLS or IPsec. MFA does not encrypt traffic; it merely establishes that the party is who they claim to be, so an attacker can still sniff or alter data if encryption is absent or misconfigured.
When this WOULD be correct
In a question asking about the benefits of multifactor authentication in relation to data transmission security, one might argue that it enhances security by ensuring that even if data is intercepted, unauthorized access is still prevented. In this context, the answer could be seen as correct if it implies that multifactor authentication contributes to overall security measures, including encryption.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 200-301 exam frequently reuses these exact scenarios with slightly different constraints.
✓It relies on more than one authentication factor.Correct answer▾
Why this is correct
Multifactor authentication (MFA) is stronger because it requires the user to present at least two independent authentication factors, typically from the categories of knowledge (something you know, e.g., a password), possession (something you have, e.g., a smart card or OTP token), and inherence (something you are, e.g., a fingerprint). By combining factors, an attacker must compromise multiple distinct mechanisms, which dramatically reduces the likelihood of successful unauthorized access compared to relying on a single factor that could be stolen, guessed, or reused.
✗It removes the need for authorization policies.Wrong answer — click to see why▾
Why this is wrong here
This option is incorrect because multifactor authentication (MFA) does not eliminate the need for authorization policies; rather, it complements them by adding additional layers of security. Authorization policies are still essential to define access rights and permissions.
★ When this WOULD be the correct answer
In a different exam question asking about the benefits of simplifying security protocols, an option stating that MFA removes the need for authorization policies could be correct if the context implies a scenario where MFA is used to streamline access control, reducing reliance on complex policies.
Why candidates choose this
Candidates may choose this option due to a misunderstanding of how MFA integrates with security frameworks, mistakenly believing that adding MFA simplifies overall security management by eliminating the need for policies.
✗It guarantees that credentials can never be phished.Wrong answer — click to see why▾
Why this is wrong here
This option is incorrect because multifactor authentication does not guarantee that credentials cannot be phished; it adds layers of security but does not eliminate the risk of phishing attacks targeting the factors used.
★ When this WOULD be the correct answer
In a different exam scenario, a question might ask if multifactor authentication completely prevents phishing attacks. In this context, an answer stating that it guarantees credentials can never be phished could be deemed correct if the question implies that the presence of multiple factors significantly mitigates the risk.
Why candidates choose this
Candidates may choose this option due to a common misconception that multifactor authentication inherently protects against all forms of credential theft, leading them to believe it provides absolute security against phishing.
✗It replaces encryption on the network.Wrong answer — click to see why▾
Why this is wrong here
This option is wrong because multifactor authentication does not replace encryption; instead, it adds an additional layer of security to the authentication process. Encryption and multifactor authentication serve different purposes in securing data and access.
★ When this WOULD be the correct answer
In a question asking about the benefits of multifactor authentication in relation to data transmission security, one might argue that it enhances security by ensuring that even if data is intercepted, unauthorized access is still prevented. In this context, the answer could be seen as correct if it implies that multifactor authentication contributes to overall security measures, including encryption.
Why candidates choose this
Candidates may find this option tempting because they might confuse multifactor authentication with other security measures like encryption, thinking that both are interchangeable solutions for securing data access.
Analysis generated from the official 200-301blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-301 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 200-301 exam.