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350-701 Practice Question: Which EAP method used with 802.1X requires a…
Which EAP method used with 802.1X requires a client-side certificate for authentication?
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
✓
EAP-TLS
EAP-TLS uses certificates on both the client and server sides for mutual authentication. PEAP-MSCHAPv2 uses server certificate and client credentials (password).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
LEAP
Why it's wrong here
LEAP uses MS-CHAPv2 credentials, no certificate.
- ✗
PEAP-MSCHAPv2
Why it's wrong here
PEAP-MSCHAPv2 uses server-side certificate and client password, not client certificate.
- ✓
EAP-TLS
Why this is correct
EAP-TLS requires certificates on both client and server.
- ✗
EAP-MD5
Why it's wrong here
EAP-MD5 only uses shared secret, no certificate.
Quick reference
AAA Protocol Comparison
| Protocol | Port(s) | Encryption | Transport | Primary Use |
|---|---|---|---|---|
| RADIUS | 1812 / 1813 | Password only | UDP | Network access control |
| TACACS+ | 49 | Full packet | TCP | Device administration |
| Diameter | 3868 | Full session | TCP / SCTP | Carrier / mobile networks |
| 802.1X | — | EAP-based | Layer 2 | Port-based access control |
TACACS+ encrypts the entire packet; RADIUS only encrypts the password field — a key exam distinction.
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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.