What is a benefit of applying TACACS authentication for device access?

TACACS+ centralizes administrator authentication and authorization so the same credentials and role definitions apply consistently across routers, switches, firewalls, and other Cisco platforms, greatly simplifying and unifying device access management.

A. TACACS+ supports granular role-based authorization, not static undifferentiated groups.

B. TACACS+ consolidates—rather than fragments—access statistics and logs.

D. TACACS+ separates network-user (AAA services) from device-admin authentication, not merges them into one user.

1. Cisco IOS Security Configuration Guide, “Configuring TACACS+ for Device Administration”, section “Benefits”, bullet 1 “Provides centralized, consistent administrator access across multiple devices.”

2. RFC 8907 – TACACS+ Protocol, §1.3, “centralized AAA for network devices allows uniform admin experience”.