This SSCP practice question tests your understanding of access controls. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which two components are integral to a Kerberos authentication system? (Select TWO)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
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Key Distribution Center (KDC)
The Key Distribution Center (KDC) is the core component of a Kerberos authentication system, responsible for issuing tickets and managing session keys. The Ticket Granting Ticket (TGT) is a temporary credential obtained from the Authentication Server (AS) within the KDC, used to request service tickets without re-entering credentials. Both are integral to the Kerberos protocol (RFC 4120) for secure, ticket-based authentication.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Authentication Server (AS)
Why it's wrong here
While the AS is a component of the KDC, it is not as distinct as the KDC itself or the TGT when asking for 'integral components'.
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Key Distribution Center (KDC)
Why this is correct
The KDC is the central component that authenticates users and issues tickets.
Related concept
Read the scenario before looking for a memorised answer.
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Ticket Granting Ticket (TGT)
Why this is correct
The TGT is a token that allows users to request service tickets without re-authentication.
Related concept
Read the scenario before looking for a memorised answer.
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Certificate Authority (CA)
Why it's wrong here
CAs are used in Public Key Infrastructure (PKI), not in Kerberos directly.
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Security Assertion Markup Language (SAML)
Why it's wrong here
SAML is used for federated identity and single sign-on in web environments, not native to Kerberos.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often select 'Authentication Server (AS)' as a separate component, not realizing it is a subcomponent of the KDC, and thus fail to recognize that the KDC and TGT are the two integral components tested.
Detailed technical explanation
How to think about this question
Under the hood, the KDC combines the Authentication Server (AS) and Ticket Granting Server (TGS) into a single logical service. When a user authenticates, the AS issues a TGT encrypted with the user's password hash; the TGT is then used by the TGS to issue service tickets for specific resources, all without transmitting the password in plaintext. In real-world scenarios, Kerberos is commonly used in Active Directory environments, where the domain controller acts as the KDC, and the TGT is cached locally with a default lifetime of 10 hours (configurable via Group Policy).
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Access Controls — This question tests Access Controls — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Key Distribution Center (KDC) — The Key Distribution Center (KDC) is the core component of a Kerberos authentication system, responsible for issuing tickets and managing session keys. The Ticket Granting Ticket (TGT) is a temporary credential obtained from the Authentication Server (AS) within the KDC, used to request service tickets without re-entering credentials. Both are integral to the Kerberos protocol (RFC 4120) for secure, ticket-based authentication.
What should I do if I get this SSCP question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This SSCP practice question is part of Courseiva's free ISC2 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SSCP exam.
Question Discussion
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