The correct answer is group-based access control because it describes the scenario where permissions are assigned to a group, and users inherit access solely through their membership in that group rather than through individual user-level permissions. This identity concept streamlines administration by allowing an administrator to manage access for multiple users at once, as seen when a user cannot access a SharePoint Online document directly but can through a group they belong to. On the SC-900 exam, this concept tests your understanding of how Microsoft Entra ID and SharePoint manage permissions, often appearing in questions that contrast it with role-based access control (RBAC), which is a specific type of group-based control using job roles, or attribute-based access control (ABAC), which relies on user attributes like department or location. A common trap is confusing group-based access with RBAC, but remember: group-based access is the broader category where any group—not just roles—grants permissions. Memory tip: think “group first, access second”—if the permission is tied to a group, it’s group-based access control.
SC-900 Practice Question: Describe the concepts of security, compliance, and identity
This SC-900 practice question tests your understanding of describe the concepts of security, compliance, and identity. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A user reports that they cannot access a sensitive document in SharePoint Online. The administrator checks the document's permissions and sees that the user is not listed directly, but a group they belong to has been granted access. Which identity concept describes this scenario?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Group-based access control
Group-based access control allows permissions to be assigned to groups rather than individuals, simplifying management. Option A is wrong because role-based access control is a specific type of group-based access using roles. Option B is wrong because attribute-based access control uses user attributes, not group membership. Option D is wrong because privilege escalation refers to gaining higher permissions, not normal access via groups.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Role-based access control (RBAC)
Why it's wrong here
RBAC is a type of group-based access but is more specific to roles; the scenario describes general group-based access.
✗
Privilege escalation
Why it's wrong here
Privilege escalation is an attack where a user gains unauthorized higher privileges.
✓
Group-based access control
Why this is correct
The user gains access through a group they belong to, which is group-based access control.
Related concept
Authentication checks who the user is.
✗
Attribute-based access control (ABAC)
Why it's wrong here
ABAC uses user attributes like department, not just group membership.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Trap categories for this question
Scenario analysis trap
RBAC is a type of group-based access but is more specific to roles; the scenario describes general group-based access.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SC-900 question in full detail.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related SC-900 questions on access control and AAA configuration.
Describe the concepts of security, compliance, and identity — This question tests Describe the concepts of security, compliance, and identity — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Group-based access control — Group-based access control allows permissions to be assigned to groups rather than individuals, simplifying management. Option A is wrong because role-based access control is a specific type of group-based access using roles. Option B is wrong because attribute-based access control uses user attributes, not group membership. Option D is wrong because privilege escalation refers to gaining higher permissions, not normal access via groups.
What should I do if I get this SC-900 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related SC-900 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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