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Lpi 303-300 Exam Syllabus Topics:

Section	Objectives
Application Security	- Container and service security - Secure software configuration
Network Security	- VPN technologies - Firewalls (iptables, nftables) - Secure network services
Cryptography	- Public key infrastructure (PKI) - OpenSSL usage and configuration - Data encryption and signing
Access Control	- SELinux and AppArmor - Discretionary Access Control (DAC) - Mandatory Access Control (MAC)
Security Administration	- Authentication mechanisms - System hardening
Vulnerability Assessment and Monitoring	- Intrusion detection systems (IDS) - Log analysis and auditing

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Lpi LPIC Exam 303: Security, version 3.0 Sample Questions (Q12-Q17):

NEW QUESTION # 12
Which Linux kernel feature restricts a process's access to a subset of system calls, commonly used by container runtimes and sandboxing tools to reduce attack surface?

A. seccomp
B. namespaces
C. capabilities
D. cgroups

Answer: A

Explanation:
Secure Computing Mode (seccomp) is a Linux kernel feature that allows a process to restrict the set of system calls it is permitted to make, typically by loading a filter (often defined using BPF) that allows, denies, or traps specific syscalls. This significantly reduces a process's attack surface by preventing it from invoking syscalls it does not need, and is widely used by container runtimes like Docker and by sandboxing frameworks. cgroups control resource usage, namespaces provide isolated views of system resources, and capabilities divide root privileges into discrete units.

NEW QUESTION # 13
What is a buffer overflow?

A. A type of denial-of-service attack
B. A type of malware that disguises itself as legitimate software
C. A type of software vulnerability
D. A type of virus

Answer: C

NEW QUESTION # 14
Which of the following methods can be used to deactivate a rule in Snort? (Choose TWO correct answers.)

A. By placing a pass rule in local.rules and restarting Snort.
B. By placing a # in front of the rule and restarting Snort.
C. By deleting the rule and waiting for Snort to reload its rules files automatically.
D. By adding a pass rule to /etc/snort/rules.deactivated and waiting for Snort to reload its rules files automatically.

Answer: A,B

NEW QUESTION # 15
Which of the following authentication methods was added to NFS in version 4?

A. Winbind authentication
B. Kerberos authentication
C. SSL certificate authentication
D. SSH hostkey authentication

Answer: B

NEW QUESTION # 16
Which OpenSSL command generates a new RSA private key and a corresponding Certificate Signing Request (CSR) in a single step?

A. openssl x509 -req -in key.pem
B. openssl genpkey -algorithm RSA
C. openssl ca -in req.csr
D. openssl req -new -newkey rsa:2048 -keyout key.pem -out req.csr

Answer: D

Explanation:
The command "openssl req -new -newkey rsa:2048 -keyout key.pem -out req.csr" generates a new 2048-bit RSA private key and simultaneously creates a Certificate Signing Request (CSR) containing the requested subject information, saving the private key and the CSR to the specified files. This CSR would then be submitted to a Certificate Authority for signing. "openssl genpkey" only generates a key without a CSR, while "openssl ca" is used by a CA to sign a submitted CSR, not to generate one.

NEW QUESTION # 17
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