A large enterprise uses Navi AC networking architecture to deploy LAN network. When engineers configure Navi AC function, which of the following authentication methods does not need to ensure that…

Question

Options

• A802.1X authentication
• BMAC Authentication
• CBuilt-in Portal authentication
• DExternal Portal Authentication

• A
  10% (2)
• B
  5% (1)
• C
  81% (17)
• D
  5% (1)

Explanation

Built-in Portal authentication (C) is correct because its portal service runs entirely on the Local AC itself - the Local AC acts as its own portal server, so the entire authentication flow is self-contained and never requires the Navi AC to participate. This means there is no dependency on matching configuration between the two controllers.

Why the distractors are wrong:

• 802.1X (A) relies on EAP message exchanges that are proxied between the Local AC and Navi AC, so both must have consistent RADIUS/authentication server configuration to process supplicant requests correctly.
• MAC Authentication (B) similarly sends MAC address lookups upstream and requires the authentication server configuration to be aligned on both the Local and Navi AC to resolve access decisions.
• External Portal Authentication (D) involves redirect URLs and portal server addresses that must be configured consistently on both controllers, since the Navi AC participates in the redirect and session handoff process.

Memory tip: Think of "Built-in" as meaning self-sufficient - if the portal lives inside the Local AC, it never has to "call home" to the Navi AC, so no matching config is needed. Anything that relies on an external system or upstream coordination (RADIUS, external portal, MAC DB) requires both sides to agree.

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