What type of authentication protocol does Cisco ISE natively support for device administration?

Cisco Identity Services Engine (ISE) natively supports RADIUS (Remote Authentication Dial-In User Service) as a primary protocol for device administration. RADIUS is a networking protocol that provides centralized Authentication, Authorization, and Accounting (AAA) management for users who connect and use a network service.

When integrated with Cisco ISE, RADIUS allows for secure communication between the network devices (such as switches, routers, and wireless access points) and ISE, facilitating robust access control policies. The use of RADIUS is particularly essential for environments that require strong authentication mechanisms, especially for administrative access to network devices.

In comparison, HTTPS and SSH are protocols that are used for secure communication but do not serve as authentication protocols in the context of device administration. HTTPS is primarily used for secure web communication, while SSH (Secure Shell) is a cryptographic network protocol for secure access to network devices but is not a native authentication protocol supported by Cisco ISE for device administration. LDAP (Lightweight Directory Access Protocol) is more focused on directory services and is often used for accessing directory information services but does not function as the primary AAA protocol like RADIUS does.

Thus, RADIUS stands out as the correct answer due to its role in enabling centralized authentication and its integration