Lpi 117-303 Exam : LPI Level 3 Exam (LPI 303: Security)

117-303
  • Exam Code: 117-303
  • Exam Name: LPI Level 3 Exam (LPI 303: Security)
  • Updated: Aug 22, 2026
  • Q & A: 101 Questions and Answers

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Lpi 117-303 Exam Syllabus Topics:

SectionObjectives
Topic 1: System Hardening and Monitoring- Security monitoring and auditing
  • 1. Intrusion detection systems (IDS)
    • 2. Log analysis and auditd
      - System security hardening
      • 1. Secure boot and system integrity
        • 2. Kernel and service hardening
          Topic 2: Access Control and Authentication- Authorization mechanisms
          • 1. Sudo and privilege escalation control
            • 2. File permissions and ACLs
              - Authentication systems
              • 1. PAM configuration and usage
                • 2. LDAP integration
                  Topic 3: Incident Response and Troubleshooting- Recovery and mitigation
                  • 1. Backup and restore strategies
                    • 2. System recovery after compromise
                      - Security incident handling
                      • 1. Incident detection and response procedures
                        • 2. Forensics basics on Linux systems
                          Topic 4: Cryptography and Data Security- Encryption technologies
                          • 1. OpenSSL usage and certificate management
                            • 2. Symmetric and asymmetric encryption
                              - PKI and certificates
                              • 1. Certificate lifecycle management
                                • 2. X.509 certificates and trust chains
                                  Topic 5: Network Security- Firewall and packet filtering
                                  • 1. iptables and nftables configuration
                                    • 2. Network segmentation and filtering rules
                                      - Secure network services
                                      • 1. SSH hardening and configuration
                                        • 2. VPN setup and management

                                          Lpi LPI Level 3 Exam (LPI 303: Security) Sample Questions:

                                          1. A user is attempting to connect to a remote host via SSH and following message is displayed: Host key verification failed. Which of the following options could resolve the problem? (Select TWO correct answers)

                                          A) Enable the PasswordAuthentication parameter on the remote host.
                                          B) Generate new SSH host keys on the remote host.
                                          C) Add the o StrictHostKeyChecking=no option to the command.
                                          D) Update the remote host's SSH host key in the list of know hosts.
                                          E) Generate a new private key which is compatible with the server's host key.


                                          2. The system administrator is keeping local configuration file changes in RCS. What command will commit the file to RCS revision control AND keep a local, unlocked copy of the latest version of the file?

                                          A) rcs commit file
                                          B) ci file
                                          C) rcs o file
                                          D) ci u file


                                          3. How does AppArmor configure its access control settings?

                                          A) A profile is assigned per application that specifies the system resources available to the application.
                                          B) AppArmor does not require any configuration.
                                          C) AppArmor inspects the Linux system to determine which applications are installed and configures itself. This configuration can then be modified manually.
                                          D) AppArmor relies on precompiled policies. These policies are updated with new releases or can be downloaded periodically.


                                          4. CORRECT TEXT
                                          Where is the global list of known SSH host keys located? (Supply the full path and filename)


                                          5. How are SELinux permissions related to standard Linux permissions?

                                          A) SELinux permissions are verified before standard Linux permissions.
                                          B) SELinux permissions are verified after standard Linux permissions.
                                          C) SELinux permissions override standard Linux permissions.
                                          D) Standard Linux permissions override SELinux permissions.


                                          Solutions:

                                          Question # 1
                                          Answer: C,D
                                          Question # 2
                                          Answer: D
                                          Question # 3
                                          Answer: A
                                          Question # 4
                                          Answer: Only visible for members
                                          Question # 5
                                          Answer: B

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