Which two external authentication methods are supported by the Junos OS for user authentication? (Choose two.)
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A. B. C. D.AD
The Junos OS, a network operating system developed by Juniper Networks, supports several external authentication methods for user authentication. These methods allow network administrators to enforce security policies, manage user accounts, and control access to network resources.
The two external authentication methods supported by Junos OS for user authentication are:
A. RADIUS (Remote Authentication Dial-In User Service): RADIUS is a widely used authentication protocol that provides centralized authentication, authorization, and accounting (AAA) for remote access servers. RADIUS servers maintain user accounts and validate user credentials when users attempt to access network resources. When a user logs in, the RADIUS client sends the user's credentials to the RADIUS server for authentication. The RADIUS server then sends a response to the client indicating whether the authentication was successful or not. Junos OS supports RADIUS authentication for all Junos devices.
D. TACACS+ (Terminal Access Controller Access-Control System Plus): TACACS+ is an AAA protocol that provides centralized authentication, authorization, and accounting for network devices. TACACS+ separates authentication, authorization, and accounting functions, providing greater flexibility and security than RADIUS. When a user attempts to access a network resource, the TACACS+ client sends the user's credentials to the TACACS+ server for authentication. The TACACS+ server then sends a response to the client indicating whether the authentication was successful or not. Junos OS supports TACACS+ authentication for all Junos devices.
B. KERBEROS and C. IPsec are not external authentication methods.
B. KERBEROS (Kerberos Authentication Protocol) is a network authentication protocol used to authenticate users and services over insecure networks. However, Kerberos is not an external authentication method supported by Junos OS.
C. IPsec (Internet Protocol Security) is a protocol suite for securing Internet Protocol (IP) communications. IPsec provides secure communication by encrypting and authenticating IP packets. However, IPsec is not an external authentication method supported by Junos OS.