Lpi 303-300 Dumps [2026] - Try Free 303-300 Exam Questions Demo

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Lpi 303-300 Exam Syllabus Topics:

Section	Objectives
Topic 1: Cryptography	- Data encryption and signing - OpenSSL usage and configuration - Public key infrastructure (PKI)
Topic 2: Network Security	- VPN technologies - Firewalls (iptables, nftables) - Secure network services
Topic 3: Application Security	- Container and service security - Secure software configuration
Topic 4: Security Administration	- System hardening - Authentication mechanisms
Topic 5: Vulnerability Assessment and Monitoring	- Log analysis and auditing - Intrusion detection systems (IDS)
Topic 6: Access Control	- Mandatory Access Control (MAC) - SELinux and AppArmor - Discretionary Access Control (DAC)

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Lpi LPIC Exam 303: Security, version 3.0 Sample Questions (Q92-Q97):

NEW QUESTION # 92
What is a Trojan?

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

Answer: D

NEW QUESTION # 93
What is the primary function of an Intrusion Detection System (IDS) such as Snort or Suricata operating in network-based mode?

A. To passively monitor network traffic and generate alerts based on signature or anomaly-based detection rules.
B. To encrypt network traffic between hosts.
C. To perform DNS resolution for network hosts.
D. To actively block malicious traffic before it reaches its destination.

Answer: A

Explanation:
A network-based Intrusion Detection System (NIDS), such as Snort or Suricata operating in IDS mode, passively monitors network traffic, typically via a mirrored switch port or network tap, and compares it against a set of signatures or behavioral rules to detect potential malicious activity, generating alerts for further investigation. This differs from an Intrusion Prevention System (IPS), which operates inline with the traffic path and can actively drop or block traffic matching a detection rule in real time, rather than only alerting after the fact.

NEW QUESTION # 94
What is a Certificate Revocation List (CRL)?

A. A list of X.509 certificates that have been issued by a particular CA
B. A list of public keys that have been compromised
C. A list of private keys that have been compromised
D. A list of X.509 certificates that have been revoked by a particular CA

Answer: D

NEW QUESTION # 95
Which command displays currently listening TCP and UDP sockets along with the process ID and name of the associated program?

A. traceroute
B. ss -tulnp
C. dig
D. ping -c 4

Answer: B

Explanation:
The command "ss -tulnp" displays currently listening TCP (-t) and UDP (-u) sockets (-l), showing numeric addresses and ports (-n) along with the process ID and name of the program holding each socket open (-p), which requires appropriate privileges to view processes owned by other users. This is useful for auditing which services are actively listening on a system and identifying unexpected or unauthorized listening services. ping, traceroute, and dig are used for connectivity testing, path tracing, and DNS lookups respectively, not for enumerating local listening sockets.

NEW QUESTION # 96
How are SELinux permissions related to standard Linux permissions?
(Choose TWO correct answers.)

A. SELinux permissions are verified after standard Linux permissions.
B. Standard Linux permissions override SELinux permissions.
C. SELinux permissions are verified before standard Linux permissions.
D. SELinux permissions override standard Linux permissions.

Answer: A,B

NEW QUESTION # 97
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