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Linux Foundation KCSA Exam - Topic 2 Question 2 Discussion

By default, in a Kubeadm cluster, which authentication methods are enabled?
C) X509 Client Certs, Bootstrap Tokens, and Service Account Tokens
A) OIDC, Bootstrap tokens, and Service Account Tokens
B) X509 Client Certs, OIDC, and Service Account Tokens
D) X509 Client Certs, Webhook Authentication, and Service Account Tokens

Linux Foundation KCSA Exam - Topic 2 Question 2 Discussion

Actual exam question for Linux Foundation's KCSA exam
Question #: 2
Topic #: 2
[All KCSA Questions]

By default, in a Kubeadm cluster, which authentication methods are enabled?

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Suggested Answer: C

by Pilar at Oct 07, 2025, 05:20 AM

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Carolann
4 months ago
B covers the basics well. Strong choice!
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Kathrine
4 months ago
A seems too broad. OIDC is key, but not all are needed.
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Tran
4 months ago
D has Webhook Authentication, but I still prefer B.
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Justine
4 months ago
I'm leaning towards C. Bootstrap tokens are crucial.
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Susana
5 months ago
I agree, B makes sense. X509 is standard too.
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Paulina
5 months ago
Yup, B is correct! Good to know.
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Robt
5 months ago
Wait, are you sure about that? I thought it was different.
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Marget
5 months ago
Totally agree, that's the default setup!
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Leota
5 months ago
I feel like Service Account Tokens are always part of the default setup, but I’m confused about the other options.
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Gracia
6 months ago
I’m leaning towards option C, but I can’t recall if Bootstrap Tokens are actually included by default.
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Dorathy
6 months ago
I think I remember that X509 Client Certs are definitely one of the default methods, but I'm not sure about the others.
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Joanna
6 months ago
It's B) X509 Client Certs, OIDC, and Service Account Tokens.
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Denise
6 months ago
I think it's B. OIDC is essential for modern clusters.
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Fredric
6 months ago
C) X509 Client Certs, Bootstrap Tokens, and Service Account Tokens. Easy peasy, lemon squeezy!
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Loreta
7 months ago
I practiced a similar question last week, and I believe OIDC was mentioned as a default method too.
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Deangelo
7 months ago
I thought Bootstrap Tokens were included by default.
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Werner
7 months ago
Option C is the way to go. Anything else would be too much of a hassle to set up.
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Bobbye
7 months ago
I'm going with C as well. Can't go wrong with the default settings, right?
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Fletcher
7 months ago
Definitely C. I've set up a few Kubeadm clusters and that's the standard configuration.
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Kimbery
8 months ago
C) X509 Client Certs, Bootstrap Tokens, and Service Account Tokens. This is the default authentication method in Kubeadm clusters.
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Pansy
8 months ago
I'm pretty sure the answer is C, but I'll double-check the Kubeadm documentation just to be sure. I don't want to risk getting this wrong.
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Blondell
8 months ago
I remember learning about the Kubeadm authentication methods in class, but I'm drawing a blank right now. I'll have to use the process of elimination to try and figure this out.
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Octavio
8 months ago
Okay, I've got this. Kubeadm defaults to X509 client certs, Bootstrap tokens, and Service Account Tokens for authentication. I'm confident that's the right answer.
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Emilio
8 months ago
Hmm, I'm a bit confused on this one. I know Kubeadm uses some form of authentication, but I can't recall the exact details. I'll have to think this through carefully.
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Shayne
8 months ago
I think the answer is C, but I'm not 100% sure. I'll need to review the Kubeadm documentation again to be certain.
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Jina
3 months ago
A is a possibility too, but I agree with C mostly.
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Lai
3 months ago
D sounds interesting, but I don't think it's correct.
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Troy
3 months ago
I thought it was B. Need to double-check.
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Jolene
3 months ago
I also lean towards C. Seems right.
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