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350-701 Practice Question: An engineer is configuring Cisco ISE for 802.1X…
An engineer is configuring Cisco ISE for 802.1X authentication. The organization has a mix of devices, including some that do not support 802.1X supplicants. Which method should the engineer use to allow these non-supplicant devices to 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
✓
Enable MAC Authentication Bypass on the authenticator
MAC Authentication Bypass (MAB) allows devices that cannot run an 802.1X supplicant to authenticate based on their MAC address, which is sent as the username and 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.
- ✓
Enable MAC Authentication Bypass on the authenticator
Why this is correct
Correct. MAB allows devices to authenticate using their MAC address when they cannot run an 802.1X supplicant.
- ✗
Deploy Cisco AMP connectors on all endpoints
Why it's wrong here
Cisco AMP is for endpoint security, not for authentication bypass.
- ✗
Configure a guest portal for self-registration
Why it's wrong here
Guest portal is for guest users, not for non-supplicant devices that need network access.
- ✗
Use EAP-TLS with device certificates
Why it's wrong here
EAP-TLS requires an 802.1X supplicant and certificates, which non-supplicant devices lack.
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
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