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

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

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

                                          1. Which of the following are common techniques for securing a sendmail server? (Select THREE correct answers)

                                          A) Maintain user accounts in an LDAP directory.
                                          B) Enable TLS.
                                          C) Disable VRFY.
                                          D) Disable USRLKUP.
                                          E) Run sendmail in a chroot'd environment.


                                          2. Which of the following is NOT included in a Snort rule header?

                                          A) packet byte offset
                                          B) source IP address
                                          C) protocol
                                          D) action
                                          E) source port


                                          3. What openssl command will generate a selfsigned test certificate?

                                          A) openssl sign new x509 key privkey.pem out cacert.pem days 365
                                          B) openssl req key privkey.pem out cacert.pem days 365
                                          C) openssl req new x509 key privkey.pem out cacert.pem days 365
                                          D) openssl sign key privkey.pem out cacert.pem days 365


                                          4. An administrator has created a mapping with the following command:
                                          cryptsetup luksOpen /dev/sda1 cryptvol and has set three different keys. Which command below will delete the first key?

                                          A) cryptsetup luksDelKey /dev/mapper/cryptvol 0
                                          B) cryptsetup luksDelKey /dev/mapper/cryptvol 1
                                          C) cryptsetup luksDelKey /dev/sda1 0
                                          D) cryptsetup luksDelKey /dev/sda1 1


                                          5. What is the syntax error in the following simple Puppet configuration file?
                                          class test_class { file { "/tmp/test.txt": mode => 600, owner => root, group => root } } # Define the node node testclient { isa test_class }

                                          A) class, node and file sections require a semicolon (;) at the end of their definitions.
                                          B) Comments begin with // character and not a #.
                                          C) isa should be include.
                                          D) The colon (:) after /tmp/test.txt should be a semicolon (;).


                                          Solutions:

                                          Question # 1
                                          Answer: B,C,E
                                          Question # 2
                                          Answer: A
                                          Question # 3
                                          Answer: C
                                          Question # 4
                                          Answer: C
                                          Question # 5
                                          Answer: C

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