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

303-300
  • Exam Code: 303-300
  • Exam Name: LPIC Exam 303: Security, version 3.0
  • Updated: Sep 22, 2026
  • Q & A: 163 Questions and Answers
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Lpi 303-300 Exam Syllabus Topics:

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

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

Question #1

Which of the following DNS records is used to map an IP address to a hostname?

  • A. PTR
  • B. SOA
  • C. NS
  • D. A
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

Question #2

What happens when the command getfattr afile is run while the file afile has no extended attributes set?

  • A. getfattr prints a warning and exits with a value of 1.
  • B. No output is produced and getfattr exits with a value of 0.
  • C. getfattr prints a warning and exits with a values of 0.
  • D. No outputs is produced and getfattr exits with a value of 1.
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

Question #3

An X509 certificate contains the following information:
X509v3 Basic Constraints: critical CA:TRUE, pathlen:0
Which of the following statements are true regarding the certificate? (Choose THREE correct answers.)

  • A. This certificate may never be used to sign any other certificates.
  • B. This certificate belongs to a certification authority.
  • C. This certificate may be used to sign certificates of subordinate certification authorities.
  • D. This certificate may be used to sign certificates that are not also a certification authority.
  • E. This certificate will not be accepted by programs that do not understand the listed extension.
Reveal Solution  Discussion  0

Correct Answer: B,C,D  🗳️

Question #4

A LUKS device was mapped using the command: cryptsetup luksOpen/dev/sda1 crypt-vol Given that this device has three different keys, which of the following commands deletes only the first key?

  • A. cryptsetup luksDelkey /dev/sda 1 1
  • B. cryptsetup luksDelKey / dev /mapper/crypt- vol 0
  • C. cryptsetup luksDelKey /dev/sda 1 0
  • D. cryptsetup luksDelKey / dev /mapper/crypt- vol 1
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

Question #5

Which protocol is commonly used to transmit X.509 certificates?

  • A. HTTPS
  • B. SMTPS
  • C. FTPS
  • D. LDAP
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

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