Which line can be configured for AAA on a router?
- line con 0
- line vty 0 4
- line aux 0
- line con 0, line vty 0 4, and line aux 0
Explanation: AAA (Authentication, Authorization, and Accounting) can be applied to all physical and virtual access lines of a Cisco router. The sources explicitly state that a default method list is used on all lines, including VTY, CON, and AUX, unless a specifically named method list is defined for a particular line. This allows for consistent administrative access security across the console, auxiliary, and remote terminal ports.
Related exam: Checkpoint Exam: MPLS and VPN Technologies
