Which of the following are the centralized administration technologies? Each correct answer represents a complete solution. Choose all that apply.

Question

Options

• ARADIUS
• BTACACS+
• CMedia Access control
• DPeer-to-Peer

• A
  95% (35)
• C
  3% (1)
• D
  3% (1)

Explanation

RADIUS (Remote Authentication Dial-In User Service) and TACACS+ (Terminal Access Controller Access-Control System Plus) are both centralized administration technologies designed to provide Authentication, Authorization, and Accounting (AAA) services from a central server, allowing administrators to manage network access for many users and devices from one location.

Why the distractors are wrong:

• C. Media Access Control (MAC) is a hardware addressing scheme used to identify devices on a local network segment - it has nothing to do with centralized user administration.
• D. Peer-to-Peer is the opposite of centralized; it distributes control across nodes with no central authority.

Memory tip: Think of the "AAA hotels" - RADIUS and TACACS+ are the two major "AAA frameworks" (Authentication, Authorization, Accounting). If a technology provides AAA services from a single server, it's centralized. TACACS+ is Cisco-proprietary and encrypts the entire packet; RADIUS is an open standard and encrypts only the password - but both are centralized.

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