JNCIP-DC: Juniper Networks Certified Professional – Data Center — Question 1

Which two statements correctly describe how EX Series switches use captive portal for Layer 2 authentication? (Choose two.)

Answer options

• A. The captive portal is the default Layer 2 authentication method that is applied before other methods such as 802.1X or MAC RADIUS.
• B. The captive portal authentication allowlist works for devices that do not have HTTP capabilities.
• C. The captive portal is configured on Layer 3 interfaces and does not participate in Layer 2 authentication on EX Series switches.
• D. The captive portal is used as a fallback mechanism for clients that fail 802.1X or MAC RADIUS authentication.

Correct answer: A, D

Explanation

Option A is correct as it states that the captive portal is the default method used for Layer 2 authentication before any other methods. Option D is also correct because it indicates that the captive portal acts as a fallback for clients that do not pass 802.1X or MAC RADIUS authentication. Options B and C are incorrect because they misrepresent the capabilities and configuration of the captive portal in relation to Layer 2 authentication.