LFCS · Question #396
LFCS Question #396: Real Exam Question with Answer & Explanation
The correct answer is D: The server's SSH host key cannot be found in the list of known hosts.. This message indicates that the SSH client has not previously encountered or stored the remote server's host key fingerprint in its known_hosts file.
Question
A user is attempting to connect to a remote server via SSH and receives the following message: The authenticity of host 'mail.example.com (208.77.188.166)' can't be established. RSA key fingerprint is 92:32:55:e9:c4:20:ae:1b:2c:d7:91:40:90:89:1c:ad. Are you sure you want to continue connecting (yes/no)? What does this indicate?
Options
- AThe RSA key fingerprint was found in the SpamCop database, indicating that the remote host is a
- BThe user's SSH client was unable to connect to the remote host's authentication agent for verification.
- CThe user's SSH client is incompatible with the server's RSA key.
- DThe server's SSH host key cannot be found in the list of known hosts.
Explanation
This message indicates that the SSH client has not previously encountered or stored the remote server's host key fingerprint in its known_hosts file.
Common mistakes.
- A. SSH host key fingerprints are not checked against a SpamCop database; this is unrelated to the SSH host key verification process.
- B. This message does not relate to an authentication agent; it is specifically about verifying the identity of the remote host itself based on its host key.
- C. The client is compatible with the server's key, as it successfully received and displayed the RSA key fingerprint, it just hasn't verified its authenticity against known keys.
Concept tested. SSH host key verification
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