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LPI Exam 102-500 Topic 3 Question 103 Discussion

Actual exam question for LPI's 102-500 exam
Question #: 103
Topic #: 3
[All 102-500 Questions]

What is a purpose of an SSH host key?

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Suggested Answer: B

An SSH host key is a cryptographic key used for authenticating computers in the SSH protocol. Host keys are key pairs, typically using the RSA, DSA, or ECDSA algorithms. Public host keys are stored on and/or distributed to SSH clients, and private keys are stored on SSH servers. Each host (i.e., computer) should have a unique host key. Host keys are used for authentication towards the connecting client, analogous to user SSH keys.Host keys are generated using asymmetric encryption algorithms like RSA, DSA, or ECDSA algorithms12. When a client connects to the host, the host sends its public host key to the client, and the client verifies that the host key matches the one stored in its known hosts file. If the host key is unknown or has changed, the client will display a warning and prompt the user to accept or reject the host key. This is to prevent man-in-the-middle attacks, where an attacker intercepts the connection and pretends to be the legitimate host. The other options are either incorrect or irrelevant to the purpose of an SSH host key.Reference:

What is an SSH Host Key & How are They Configured?, What are SSH Host Keys? section

SSH Host Key Management Demystified, What are SSH host keys? section

What is SSH host key - omnisecu.com, first paragraph


by Maurine at Apr 08, 2025, 09:37 AM

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Rolande
29 days ago
Haha, I was going to say option D, but that would be like having the fox guard the henhouse! The host key is for the server, not the user.
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Tomas
1 days ago
E) It is used by system services like cron, syslog or a backup job to automatically connect to remote hosts.
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Noah
15 days ago
B) It provides the server's identity information to connecting SSH clients.
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Pamella
1 months ago
I was thinking option E, but you're right, B makes more sense. The host key is used to authenticate the server, not the user.
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Lashunda
8 days ago
Option E is used for system services, not for authenticating the server. Option B is correct for identifying the server.
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Cathrine
14 days ago
Exactly, option B provides the server's identity information to connecting SSH clients.
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Jenise
19 days ago
The host key is used to authenticate the server, not the user.
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Geraldo
1 months ago
I was thinking option E, but you're right, B makes more sense.
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Kandis
2 months ago
I believe option B is the correct answer because the SSH host key is used for server authentication.
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Flo
2 months ago
I agree with you, Flo. It helps ensure that the client is connecting to the correct server and not a malicious one.
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Golda
2 months ago
Option B seems like the correct answer. The host key allows the client to verify the identity of the SSH server it's connecting to, ensuring it's the correct host.
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Dorothy
25 days ago
User 2: Yes, that's right. It helps ensure that the client is connecting to the correct server.
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Brent
27 days ago
User 1: Option B seems correct. The host key provides the server's identity information to connecting SSH clients.
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Wenona
2 months ago
I think the purpose of an SSH host key is to provide the server's identity information to connecting SSH clients.
upvoted 0 times
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