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

  • Exam Code: 303-300
  • Exam Name: LPIC Exam 303: Security, version 3.0
  • Updated: Aug 21, 2026     Q & A: 163 Questions and Answers

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Lpi 303-300 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Network Security17%- Packet Filtering
- Virtual Private Networks
- Network Intrusion Detection
- Network Hardening
Topic 2: Access Control8%- Mandatory Access Control
- Discretionary Access Control
Topic 3: Threats and Vulnerability Assessment5%- Common Security Vulnerabilities and Threats
- Penetration Testing
Topic 4: Host Security13%- Host Intrusion Detection
- Host Hardening
- Resource Control
Topic 5: Cryptography17%- X.509 Certificates for Encryption, Signing and Authentication
- X.509 Certificates and Public Key Infrastructures
- DNS and Cryptography
- Encrypted File Systems

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

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

A) LDAP
B) HTTPS
C) FTPS
D) SMTPS


2. In nftables, what is the purpose of a "base chain" as opposed to a "regular chain"?

A) A base chain can only contain accept rules.
B) A base chain is used only for NAT rules.
C) There is no functional difference between base and regular chains.
D) A base chain is directly attached to a netfilter hook, such as input or forward, allowing it to receive packets from the kernel.


3. Which command, included in BIND, generates DNSSEC keys? (Specify ONLY the command without any path or parameters.) Solution: dnssec-keygen Determine whether the given solution is correct?

A) Correct
B) Incorrect


4. 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 values of 0.
B) getfattr prints a warning and exits with a value of 1.
C) No outputs is produced and getfattr exits with a value of 1.
D) No output is produced and getfattr exits with a value of 0.


5. Which command is used to create an encrypted LUKS-formatted block device?

A) cryptsetup open /dev/sdX
B) cryptsetup luksFormat /dev/sdX
C) dm-crypt --format /dev/sdX
D) mkfs.luks /dev/sdX


Solutions:

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

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