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Difficulty: EasyAAA Framework Concepts (Authentication, Authorization, Accounting)

Which TWO operational characteristics accurately describe the RADIUS protocol implementation? (Select TWO)

  1. It relies on UDP ports 1812 and 1813 for transport communication.Answer
  2. It couples authentication and authorization together in single protocol transactions.Answer
  3. C
    It utilizes TCP port 49 to provide connection-oriented session transport.
  4. D
    It separates authentication and authorization into independent, modular processes.

Answer

The correct characteristics are that RADIUS relies on UDP ports 1812 and 1813 for transport communication and couples authentication and authorization together in single protocol transactions.
RADIUS utilizes UDP ports 1812 (authentication/authorization) and 1813 (accounting) for transport communication. In addition, RADIUS combines authentication and authorization into unified client-server packet transactions.

Step-by-Step Solution

1
Analyze transport protocol and port requirements for RADIUS.
RADIUS operates using UDP transport on ports 1812 (Authentication/Authorization) and 1813 (Accounting).
Differentiating transport layer protocols (UDP vs TCP) and port assignments is fundamental to AAA protocol identification.
2
Evaluate how RADIUS handles the AAA architecture pillars.
RADIUS combines authentication and authorization into a single access-request and access-accept workflow.
Unlike TACACS+, which isolates authentication, authorization, and accounting, RADIUS merges authentication and authorization.

Key Concept

RADIUS Operational Characteristics and AAA Architecture
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Topics

AAA Framework Concepts (Authentication, Authorization, Accounting)

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