350-401 Practice Question: Drag and drop each AAA method list on the left to…

Drag and drop each AAA method list on the left to its correct fallback order on the right.

Drag a concept onto its matching description — or click a concept then click the description.

Concepts

Matches

local case (no server defined): local

RADIUS then local

TACACS+ then local

local (no fallback)

none (no authentication required)

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

✓

default login authentication: local case (no server defined): local

Method lists define the order of authentication sources. The default login method uses local as fallback; a common RADIUS-first list uses local; a TACACS+-first list uses local; a local-only list uses no fallback; and a none list allows access without authentication.

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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Last reviewed: Jun 18, 2026

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