IBM C1000-156 Exam - Topic 5 Question 30 Discussion

Actual exam question for IBM's C1000-156 exam

Question #: 30
Topic #: 5

Which authentication type in QRadar encrypts the username and password and forwards the username and password to the external server for authentication?

ARADIUS authentication

BTwo-factor authentication

CTACACS authentication

DSystem authentication

Show Suggested Answer

Suggested Answer: C

TACACS (Terminal Access Controller Access-Control System) authentication is a protocol used in IBM QRadar SIEM V7.5 for authenticating users by forwarding their credentials to an external server. Here's how it works:

Encryption: TACACS encrypts the entire payload of the authentication packet, including the username and password, ensuring secure transmission.

Forwarding Credentials: After encryption, the credentials are forwarded to an external TACACS server, which performs the actual authentication.

Authentication Process: The external server checks the credentials against its database and sends a response back to QRadar indicating whether the authentication is successful or not.

Reference IBM QRadar SIEM documentation explains TACACS authentication in detail, highlighting its secure encryption and external server verification process.

by Lavonna at Jul 06, 2025, 04:22 AM

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Wilbert

2 months ago

Totally agree, RADIUS is the way to go!

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Yuette

2 months ago

I thought TACACS was the one that does that?

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Leonor

3 months ago

It's definitely RADIUS authentication.

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Slyvia

3 months ago

System authentication doesn't encrypt like that.

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Tayna

3 months ago

Wait, are we sure about that? Seems too simple.

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Dorothy

3 months ago

I have a vague memory of RADIUS being the standard for this kind of authentication, but I might be mixing it up with something else.

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Freeman

3 months ago

I recall that two-factor authentication is more about adding an extra layer, not just encrypting credentials. So I think it’s probably not that one.

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Nydia

4 months ago

I'm not entirely sure, but I feel like TACACS might also be related to this. It could be worth considering.

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Kiley

4 months ago

I think RADIUS authentication is the one that encrypts the username and password before sending it. I remember practicing a similar question.

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Lanie

4 months ago

RADIUS seems like the most likely answer based on the description, but I'll make sure to read through the options carefully before selecting my final answer.

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Timothy

4 months ago

I'm leaning towards RADIUS, but I want to double-check the definitions of the other options just to be sure I'm not missing something.

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Gianna

5 months ago

The key here is that the question is asking about the authentication type that encrypts the credentials and sends them to an external server. That sounds like RADIUS to me.

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Luisa

5 months ago

Hmm, I'm a bit confused on the differences between the authentication types. I'll need to review my notes to make sure I understand the details of each one.

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