350-701 Practice Question: Secure Network Access, Visibility and Enforcement
An administrator is configuring 802.1X on a switch port for both an IP phone and a PC. Which two commands should be configured to support this scenario? (Choose two)
⚠ Common exam trap
Cisco often tests the distinction between `multi-domain` and `multi-auth`; the trap here is that candidates mistakenly choose `multi-auth` thinking it supports multiple devices, but it does not enforce the separate voice and data domains needed for a phone and PC.
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
✓
authentication host-mode multi-domain
The `authentication host-mode multi-domain` command allows one device in the voice domain (IP phone) and one device in the data domain (PC) to authenticate on the same switch port. This is the standard Cisco configuration for a phone-PC daisy-chain topology, where the phone acts as a bridge and the switch must distinguish between the two devices using separate VLANs (voice and data).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
authentication host-mode multi-domain
Why this is correct
Allows one voice and one data device.
- ✗
dot1x pae authenticator
Why it's wrong here
May be needed but less specific to the scenario.
- ✗
authentication violation restrict
Why it's wrong here
Violation action, not required for basic setup.
- ✓
authentication port-control auto
Why this is correct
Enables 802.1X authentication.
- ✗
authentication host-mode multi-auth
Why it's wrong here
Allows multiple devices per domain, not ideal for phone+PC.
Visual reference
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.