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NEW QUESTION # 28
A systems administrator is helping to secure a new web application. During the tests, the administrator obtains the following output to validate the application:
SSL connection using TLSv1.2 / ECDHE-RSA-AES256-GCM-SHA384
ALPN, server accepted to use http/1.1
Server certificate:
subject: CN=*.newapp.comptia.org
start date: Jan 17 00:00:00 2024 GMT
expire date: Feb 16 23:59:59 2034 GMT
issuer: C=US; O=Comptia; OU=IT Security; CN=ca1.comptia.org
SSL certificate verify result: unable to get local issuer certificate (20), continuing anyway.
Which of the following explains the validation results?
Answer: D
Explanation:
The correct answer is A. The certificate was not signed by a trusted authority, which was forcefully ignored during the tests. The key indicator in the output is the message: "SSL certificate verify result: unable to get local issuer certificate (20), continuing anyway." This error means that the client system cannot validate the certificate chain because it does not recognize or trust the certificate authority (CA) that issued the server certificate.
In TLS/SSL validation, the client must verify that the server's certificate chains up to a trusted root CA present in the local trust store. If the issuer (in this case, ca1.comptia.org) is not included in the client's trusted certificate authorities, the verification fails. However, the phrase "continuing anyway" indicates that the validation failure was bypassed-likely due to a testing flag such as -k or --insecure in curl-allowing the connection despite the trust issue.
Option B is incorrect because the certificate validity dates show it is valid from 2024 to 2034, not expired.
Option C is incorrect because wildcard certificates (e.g., *.newapp.comptia.org) are commonly used and not inherently insecure when properly managed.
Option D is incorrect because the cipher suite shown (ECDHE-RSA-AES256-GCM-SHA384) is considered strong and modern, not outdated.
From a Linux+ security perspective, proper certificate validation is critical. Administrators should ensure that the issuing CA is trusted by installing the correct CA certificates rather than bypassing validation, which exposes systems to man-in-the-middle attacks and other security risks.
NEW QUESTION # 29
An administrator receives reports that a web service is not responding. The administrator reviews the following outputs:
Which of the following is the reason the web service is not responding?
Answer: C
Explanation:
This issue falls under the Troubleshooting domain of the CompTIA Linux+ V8 objectives, specifically service startup failures and certificate-related errors. The provided output clearly indicates that the NGINX service fails during startup due to an inability to locate the private key file.
The critical error message is:
cannot load certificate key "/etc/pki/nginx/private/server.key": No such file or directory This message confirms that NGINX is explicitly configured to look for the private key in the directory /etc/pki
/nginx/private/. However, the directory listing shows that the private directory exists but is empty, while the server.key file is located in /etc/pki/nginx/ instead. Because NGINX cannot find the private key at the configured path, the configuration test (nginx -t) fails, and systemd prevents the service from starting.
Option C correctly identifies the root cause: the private key is not in the correct location. Moving server.key into /etc/pki/nginx/private/ (or updating the NGINX configuration to match the current location) would resolve the issue. Linux+ V8 documentation stresses that service failures often result from misaligned configuration paths rather than corrupted files.
The other options are incorrect. Option A incorrectly refers to renaming a certificate file and does not address the path issue. Option B suggests a key mismatch, which would generate a different SSL error rather than a
"file not found" error. Option D is also incorrect because private keys should not have executable permissions like 0755; typically, they are restricted (for example, 0600) for security reasons.
Therefore, the web service is not responding because the private key file is not located in the directory expected by the NGINX configuration. The correct answer is C.
NEW QUESTION # 30
A systems administrator wants to prevent the current contents of a file from being overwritten and wants to allow new additions at the end of the file. Which of the following commands should the administrator use?
Answer: A
Explanation:
The chattr +a command sets the append-only attribute on a file. This prevents overwriting or deletion of existing contents, while still allowing new data to be appended to the end of the file.
NEW QUESTION # 31
A systems administrator needs to validate that the dm_multipathdriver was loaded in a Linux system. Which of the following commands should the administrator use?
Answer: A
Explanation:
lsmodlists currently loaded kernel modules; piping to grep dm_multipathconfirms whether that specific driver is active in the running kernel.
NEW QUESTION # 32
A systems administrator is creating a new shared directory. Which of the following commands ensures all users from the same group will be able to work with the newly created files?
Answer: B
Explanation:
Setting the setgid bit on a shared directory causes newly created files and subdirectories to inherit the directory's group ownership, allowing members of the same group to collaborate consistently on new files.
NEW QUESTION # 33
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