SISE Policy Enforcement Practice Question
Which TWO of the following authentication protocols are supported by ISE for 802.1X?
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
PEAP and EAP-TLS are the most common protocols used with ISE.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
SNMPv2
Why it's wrong here
SNMP is not an authentication protocol.
- ✓
EAP-TLS
Why this is correct
EAP-TLS is the preferred method for certificate-based auth.
- ✗
ICMP
Why it's wrong here
ICMP is for diagnostics, not authentication.
- ✓
PEAP
Why this is correct
PEAP is a widely used EAP method supported by ISE.
- ✗
FTP
Why it's wrong here
FTP is a file transfer protocol.
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.
About these practice questions
One of 322 original SISE practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Cisco exam blueprint
This SISE 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 SISE exam.