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| Section | Weight | Objectives |
|---|---|---|
| Host Security | 13% | - Host Hardening - Host Intrusion Detection - Resource Control |
| Threats and Vulnerability Assessment | 5% | - Penetration Testing - Common Security Vulnerabilities and Threats |
| Cryptography | 17% | - X.509 Certificates and Public Key Infrastructures - DNS and Cryptography - X.509 Certificates for Encryption, Signing and Authentication - Encrypted File Systems |
| Network Security | 17% | - Packet Filtering - Virtual Private Networks - Network Intrusion Detection - Network Hardening |
| Access Control | 8% | - Mandatory Access Control - Discretionary Access Control |
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NEW QUESTION # 99
What is a rootkit?
Answer: B
NEW QUESTION # 100
What is the purpose of the GnuPG "trust level" assigned to a key, as opposed to a signature on that key?
Answer: B
Explanation:
A trust level in GnuPG is a personal, local judgment about how much a user trusts a particular key's owner to carefully and correctly verify the identity of others before signing their keys. This is distinct from a signature, which asserts that a specific key's authenticity has been verified. Trust levels (such as none, marginal, full, and ultimate) affect how GnuPG calculates the validity of other keys in the web of trust based on the chain of signatures connecting them back to the user's own key.
NEW QUESTION # 101
What is the purpose of the pam_tally2 or pam_faillock module?
Answer: B
Explanation:
The pam_faillock module (and its older counterpart, pam_tally2) tracks the number of consecutive failed authentication attempts for a user account and can automatically lock the account after a configured threshold is reached, helping to mitigate brute-force password guessing attacks.
Administrators can configure the number of allowed attempts, the lockout duration, and whether the lockout applies even to the root account. This differs from password expiration, which is handled by fields in /etc/shadow and related PAM modules.
NEW QUESTION # 102
Which mount option prevents the execution of binaries located on the mounted filesystem?
Answer: A
Explanation:
The noexec mount option prevents any binary or script located on that filesystem from being executed directly. This is commonly applied to filesystems such as /tmp or removable media to reduce the risk of malicious code execution. nosuid disables the effect of the setuid and setgid bits on that filesystem, nodev prevents device files from being interpreted as such, and ro mounts the filesystem as read-only, none of which specifically block execution of binaries.
NEW QUESTION # 103
In GnuPG's web of trust model, what does it mean when User A signs User B's public key?
Answer: C
Explanation:
When one GnuPG user signs another user's public key, they are asserting, based on some level of verification (such as checking a passport or comparing key fingerprints in person), that they believe the key genuinely belongs to the claimed identity. This signature becomes part of the web of trust, allowing other users who trust User A to extend a degree of trust to User B's key as well, without needing to independently verify it themselves, forming a decentralized alternative to the hierarchical X.509 CA trust model.
NEW QUESTION # 104
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