A company is implementing multifactor authentication and requires a solution that utilizes TCP. Which of the following will the company MOST likely select?

Question

Options

• ASNMP
• BTACACS+
• CDHCP
• DRADIUS
• EKerberos

• A
  8% (2)
• B
  85% (22)
• C
  4% (1)
• D
  4% (1)

Explanation

TACACS+ (Terminal Access Controller Access-Control System Plus) is the correct answer because it exclusively uses TCP port 49 for all communications, making it reliable and connection-oriented. RADIUS (D) uses UDP ports 1812/1813, making it connectionless. SNMP (A) uses UDP and is a network management protocol, not an authentication protocol. DHCP (C) uses UDP and assigns IP addresses, not authentication. Kerberos (E) uses UDP/TCP but is a ticket-based protocol, not typically categorized as an MFA AAA solution in the same context. TACACS+ also separates authentication, authorization, and accounting (AAA) into distinct functions and encrypts the entire payload, making it a preferred enterprise MFA solution.

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