Kerberos uses which of the following?
A. Symmetric key cryptography
B. Asymmetric key cryptography
C. Federated identity
D. All the above
Answer: A
Explanation: Kerberos is a network authentication protocol that uses symmetric key cryptography to provide authentication services. It issues a unique key, called a ticket, to authenticated users. Users need to log in only once, and each resource checks the assigned ticket to determine if access should be granted, thus allowing for a single sign-on.
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