Lpi 303-300 real exam prep : LPIC Exam 303: Security, version 3.0

  • Exam Code: 303-300
  • Exam Name: LPIC Exam 303: Security, version 3.0
  • Updated: Aug 10, 2026
  • Q&As: 163 Questions and Answers

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Lpi 303-300 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Network Security12%- Virtual Private Networks
  • 1. WireGuard
  • 2. OpenVPN
  • 3. IPsec and strongSwan
- Network Intrusion Detection
  • 1. Wireshark
  • 2. Snort
  • 3. Kismet
  • 4. tcpdump
- Packet Filtering
  • 1. IP sets
  • 2. NAT and connection tracking
  • 3. iptables and ip6tables
  • 4. nftables awareness
- Network Hardening
  • 1. Secure network services
  • 2. TCP wrappers and service restrictions
Topic 2: Access Control8%- Discretionary Access Control
  • 1. Extended attributes
  • 2. POSIX ACLs
  • 3. File permissions
- Mandatory Access Control
  • 1. Policy enforcement
  • 2. SELinux management
  • 3. AppArmor configuration
- Authentication and Authorization
  • 1. Multi-factor authentication
  • 2. Centralized authentication
  • 3. PAM
Topic 3: Threats and Vulnerability Assessment3%- Vulnerability Assessment
  • 1. Risk identification
  • 2. OpenVAS
  • 3. Security scanning
- Threat Analysis
  • 1. Application threats
  • 2. Network threats
  • 3. Host-based threats
  • 4. Credential and confidentiality threats
Topic 4: Host Security9%- Resource Control
  • 1. cgroups
  • 2. Process resource management
  • 3. ulimits
- Host Intrusion Detection
  • 1. Malware detection
  • 2. Linux Audit system
  • 3. Rootkit detection tools
  • 4. AIDE integrity checking
- Host Hardening
  • 1. Secure boot process
  • 2. Service hardening
  • 3. Kernel runtime protection
Topic 5: Cryptography8%- OpenPGP
  • 1. Manage GnuPG keys
  • 2. Sign and encrypt data
  • 3. Web of trust concepts
- X.509 Certificates and Public Key Infrastructures
  • 1. Manage certificate authorities
  • 2. Create and manage certificates
  • 3. Certificate revocation and validation
- Data Encryption
  • 1. Use LUKS and dm-crypt
  • 2. Encrypt files and storage devices
  • 3. Secure data transmission

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

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

A) Provides automatic removal of detected threats
B) Helps prevent security incidents from occurring
C) Allows for quick response to security incidents
D) Provides real-time detection of security incidents


2. What is the difference between a SetUID and SetGID bit?

A) SetUID allows a file to be executed with the permissions of the file owner, while SetGID allows a file to be executed with the permissions of the group owner
B) SetUID allows a user to change the owner of a file, while SetGID allows a user to change the group owner of a file
C) SetUID applies to files, while SetGID applies to directories
D) There is no difference between SetUID and SetGID


3. What is the purpose of a TLSA record in DANE?

A) To sign a TLS server's public key
B) To map a domain name to an IP address
C) To authenticate a DNS server
D) To provide information about a TLS server


4. Which tool is commonly used to perform a comprehensive network port scan, including service and OS fingerprinting, as part of a security assessment?

A) netstat
B) nmap
C) tcpdump
D) Wireshark


5. What is the purpose of the Linux Audit system?

A) To manage system log files
B) To detect intrusions and system changes
C) To automate host scans
D) To manage installed packages


Solutions:

Question # 1
Answer: A
Question # 2
Answer: A
Question # 3
Answer: A
Question # 4
Answer: B
Question # 5
Answer: B

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