Lpi 303-300 : LPIC Exam 303: Security, version 3.0

303-300 real exams

Exam Code: 303-300

Exam Name: LPIC Exam 303: Security, version 3.0

Updated: Oct 02, 2026

Q & A: 163 Questions and Answers

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Lpi 303-300 Exam Syllabus Topics:

SectionWeightObjectives
Host Security9%- Resource Control
  • 1. cgroups
  • 2. Process resource management
  • 3. ulimits
- Host Hardening
  • 1. Service hardening
  • 2. Kernel runtime protection
  • 3. Secure boot process
- Host Intrusion Detection
  • 1. Malware detection
  • 2. AIDE integrity checking
  • 3. Rootkit detection tools
  • 4. Linux Audit system
Network Security12%- Network Intrusion Detection
  • 1. Wireshark
  • 2. Kismet
  • 3. tcpdump
  • 4. Snort
- Packet Filtering
  • 1. NAT and connection tracking
  • 2. nftables awareness
  • 3. IP sets
  • 4. iptables and ip6tables
- Network Hardening
  • 1. Secure network services
  • 2. TCP wrappers and service restrictions
- Virtual Private Networks
  • 1. OpenVPN
  • 2. WireGuard
  • 3. IPsec and strongSwan
Access Control8%- Authentication and Authorization
  • 1. Centralized authentication
  • 2. Multi-factor authentication
  • 3. PAM
- Discretionary Access Control
  • 1. File permissions
  • 2. POSIX ACLs
  • 3. Extended attributes
- Mandatory Access Control
  • 1. Policy enforcement
  • 2. SELinux management
  • 3. AppArmor configuration
Cryptography8%- Data Encryption
  • 1. Secure data transmission
  • 2. Encrypt files and storage devices
  • 3. Use LUKS and dm-crypt
- OpenPGP
  • 1. Manage GnuPG keys
  • 2. Web of trust concepts
  • 3. Sign and encrypt data
- X.509 Certificates and Public Key Infrastructures
  • 1. Certificate revocation and validation
  • 2. Create and manage certificates
  • 3. Manage certificate authorities
Threats and Vulnerability Assessment3%- Threat Analysis
  • 1. Network threats
  • 2. Credential and confidentiality threats
  • 3. Application threats
  • 4. Host-based threats
- Vulnerability Assessment
  • 1. Security scanning
  • 2. OpenVAS
  • 3. Risk identification

Lpi LPIC Exam 303: Security, version 3.0 Sample Questions:

Question #1

What is a ciphertext?

  • A. The original message before encryption
  • B. The encrypted message
  • C. The key used to encrypt the message
  • D. The algorithm used to encrypt the message
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

Question #2

What is the purpose of the pam_tally2 or pam_faillock module?

  • A. To restrict resource usage per user session.
  • B. To enforce password expiration policies.
  • C. To track failed login attempts and lock an account after a specified number of failures.
  • D. To require multi-factor authentication.
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

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Question #3

Which of the following is NOT a benefit of using HID?

  • A. Provides real-time detection of security incidents
  • B. Helps prevent security incidents from occurring
  • C. Allows for quick response to security incidents
  • D. Provides automatic removal of detected threats
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

Question #4

Which command included in the Linux Audit system provides searching and filtering of the audit log? (Specify ONLY the command without any path or parameters.) Solution: ausearch Determine whether the given solution is correct?

  • A. Incorrect
  • B. Correct
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

Question #5

In apache configuration which directives are used to restrict access based on host/domain name and IP address?

  • A. restrict and allow
  • B. order, allow from and deny from
  • C. deny and accept
  • D. allow IP, deny IP, allow DOMAIN and deny DOMAIN
  • E. order, deny and accept
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

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