JNCIP-ENT: Juniper Networks Certified Professional – Enterprise Routing (2023) — Question 36

You are implementing 802.1X authentication in your Layer 2 network. Each user will have a computer and a phone. The phones are not able to use an 802.1X supplicant, but traffic must be accepted once the user has authenticated their computer on the port.
In this scenario, which supplicant mode should be used?

Answer options

• A. captive-portal
• B. single
• C. multiple
• D. single-secure

Correct answer: B

Explanation

The 'single' supplicant mode allows only one device to authenticate per user, which is suitable in this scenario since the phone cannot authenticate. Other modes like 'multiple' would allow more than one device to authenticate simultaneously, which is not required here, while 'single-secure' and 'captive-portal' do not meet the needs of this specific authentication requirement.