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Lpi LPIC-3 303-300 Braindumps

303-300

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

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

Question #1
Which of the following commands adds a new user usera to FreeIPA?

A. ipa user-add usera --first User --last A
B. ipa-admin create user --account usera --fname User --iname A
C. idap- useradd -H Idaps://ipa-server CN=UserA --attribs "Firstname: User: Lastname: A"
D. ipa-user- add usera --name "User A"
E. useradd usera --directory ipa --gecos "User A"


Question #2
What is the purpose of NSEC3 in DNSSEC?

A. To prevent zone enumeration
B. To provide information about DNSSEC key signing keys
C. To sign a DNS zone
D. To authenticate a DNS server


Question #3
Which of the following is an example of a behavioral-based HID technique?

A. Rule-based detection
B. Heuristic-based detection
C. Anomaly-based detection
D. Signature-based detection


Question #4
In Suricata, what is the purpose of a "rule" file, such as those found in the emerging-threats.rules collection?

A. It defines user authentication policies for the Suricata management interface.
B. It defines the signatures and conditions used to detect specific types of malicious or suspicious network traffic.
C. It defines firewall NAT translation rules.
D. It configures which network interfaces Suricata should monitor.


Question #5
Which of the following commands disables the automatic password expiry for the user usera?

A. chage --lastday none usera
B. chage --lastday 0 usera
C. chage --maxdays -1 usera
D. chage --maxdays none usera
E. chage --maxdays 99 usera


Solutions:

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

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