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

303-300

Exam Code: 303-300

Exam Name: LPIC Exam 303: Security, version 3.0

Updated: Aug 30, 2026

Q & A: 163 Questions and Answers

303-300 Free Demo download:

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Lpi 303-300 Exam Syllabus Topics:

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

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

Question 1

Which permission bit allows a file to be executed?

A. SetUID
B. Execute
C. Read
D. Write


Question 2

Which of the following resources of a shell and its child processes can be controlled by the Bash build- in command ulimit? (Choose THREE correct answers.)

A. The maximum size of written files
B. The maximum number of newly created files
C. The maximum number of environment variables
D. The maximum number of open file descriptors
E. The maximum number of user processes


Question 3

What is a trust anchor?

A. A list of public keys that are trusted by a particular CA
B. A root certificate that is trusted by a particular CA
C. A list of private keys that are trusted by a particular CA
D. A key pair that is generated by a particular CA


Question 4

Which file defines the default set of resource limits, such as maximum open files or processes, applied to users via PAM?

A. /etc/login.defs
B. /etc/pam.d/common-session
C. /etc/sysctl.conf
D. /etc/security/limits.conf


Question 5

What is a buffer overflow?

A. A type of virus
B. A type of denial-of-service attack
C. A type of malware that disguises itself as legitimate software
D. A type of software vulnerability


Solutions:

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

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305-300 - LPIC-3 Exam 305: Virtualization and Containerization
305-300J - LPIC-3 Exam 305: Virtualization and Containerization (305-300日本語版)
303-200 - 303-200: LPIC-3 Exam 303: Security, version 2.0
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