In a NAS environment, what is a role of the Kerberos protocol?

A.
Contain ACLs that specify access rights for files/folders

B.
Authenticate clients using the CHAP protocol

C.
Allow clients to prove their identity to the servers

D.
Set up a virtual private network connection

Explanation:

Kerberos – Network Authentication Protocol
Kerberos is a network authentication protocol, which is designed to provide strong authentication
for client/server applications by using secret-key cryptography. It uses cryptography so that a
client and server can prove their identity to each other across an insecure network connection.
After the client and server have proven their identities, they can choose to encrypt all their
communications to ensure privacy and data integrity. In Kerberos, authentications occur between
clients and servers. The client gets a ticket for a service and the server decrypts this ticket by
using its secret key. Any entity, user, or host that gets a service ticket for a Kerberos service is
called a Kerberos client. The term Kerberos server generally refers to the Key Distribution Center
(KDC). The KDC implements the Authentication Service (AS) and the Ticket Granting Service
(TGS). The KDC has a copy of every password associated with every principal, so it is absolutely
vital that the KDC remain secure. In Kerberos, users and servers for which a secret key is stored
in the KDC database are known as principals.