Which of the following is an authentication and accounting service that uses TCP for connecting to routers and switches?

The correct answer is C. TACACS+. TACACS+ (Terminal Access Controller Access-Control System Plus) is a Cisco-developed AAA (Authentication, Authorization, and Accounting) protocol that uses TCP port 49 for reliable, connection-oriented communication. It is commonly used to authenticate administrators accessing…

General security concepts

Question

Options

ADIAMETER
BRADIUS
CTACACS+
DKerberos

How the community answered

(37 responses)

A
3% (1)
B
3% (1)
C
86% (32)
D
8% (3)

Explanation

TACACS+ (Terminal Access Controller Access-Control System Plus) is a Cisco-developed AAA (Authentication, Authorization, and Accounting) protocol that uses TCP port 49 for reliable, connection-oriented communication. It is commonly used to authenticate administrators accessing routers and switches. RADIUS uses UDP (ports 1812/1813), not TCP, and is more common for end-user network access (Wi-Fi, VPN). DIAMETER is a successor to RADIUS that uses TCP/SCTP but is primarily used in mobile and carrier networks. Kerberos is a ticket-based authentication protocol not specifically designed for network device management.

Topics

#TACACS+#AAA protocols#authentication#network access control

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