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350-701 Practice Question: In Cisco ISE, which protocol is used for EAP-TLS…
In Cisco ISE, which protocol is used for EAP-TLS authentication, and what is the primary requirement for the client to successfully authenticate?
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, requiring a client certificate
EAP-TLS uses certificates for mutual authentication. The client must have a valid certificate (typically issued by a CA trusted by ISE) to authenticate successfully.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
EAP-FAST, requiring a PAC file
Why it's wrong here
EAP-FAST uses a Protected Access Credential (PAC), not certificates.
- ✗
LEAP, requiring a shared secret
Why it's wrong here
LEAP uses a shared secret, not certificates.
- ✓
EAP-TLS, requiring a client certificate
Why this is correct
Correct. EAP-TLS is certificate-based; the client must present a certificate.
- ✗
PEAP-MSCHAPv2, requiring username and password
Why it's wrong here
PEAP-MSCHAPv2 uses credentials, not certificates.
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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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.