Accurate Lpi - 303-300 - Download LPIC Exam 303: Security, version 3.0 Pdf

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Lpi 303-300 Exam Syllabus Topics:

Section	Weight	Objectives
Network Security	12%	- Network Hardening 1. TCP wrappers and service restrictions 2. Secure network services - Virtual Private Networks 1. IPsec and strongSwan 2. WireGuard 3. OpenVPN - Packet Filtering 1. nftables awareness 2. iptables and ip6tables 3. IP sets 4. NAT and connection tracking - Network Intrusion Detection 1. Wireshark 2. Kismet 3. Snort 4. tcpdump
Threats and Vulnerability Assessment	3%	- Vulnerability Assessment 1. Risk identification 2. Security scanning 3. OpenVAS - Threat Analysis 1. Credential and confidentiality threats 2. Network threats 3. Application threats 4. Host-based threats
Host Security	9%	- Host Hardening 1. Service hardening 2. Secure boot process 3. Kernel runtime protection - Host Intrusion Detection 1. AIDE integrity checking 2. Malware detection 3. Rootkit detection tools 4. Linux Audit system - Resource Control 1. cgroups 2. Process resource management 3. ulimits
Access Control	8%	- Authentication and Authorization 1. Centralized authentication 2. Multi-factor authentication 3. PAM - Mandatory Access Control 1. Policy enforcement 2. AppArmor configuration 3. SELinux management - Discretionary Access Control 1. Extended attributes 2. POSIX ACLs 3. File permissions
Cryptography	8%	- X.509 Certificates and Public Key Infrastructures 1. Manage certificate authorities 2. Certificate revocation and validation 3. Create and manage certificates - OpenPGP 1. Sign and encrypt data 2. Web of trust concepts 3. Manage GnuPG keys - Data Encryption 1. Use LUKS and dm-crypt 2. Encrypt files and storage devices 3. Secure data transmission

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Lpi LPIC Exam 303: Security, version 3.0 Sample Questions (Q148-Q153):

NEW QUESTION # 148
Which of the following statements describes the purpose of ndpmon?

A. It monitors log files for failed login attempts in order to block traffic from offending network nodes.
B. It monitors the availability of a network link by querying network interfaces.
C. It monitors the network for neighbor discovery messages from new IPv6 hosts and routers.
D. It monitors remote hosts by periodically sending echo requests to them.
E. It monitors the network for IPv4 nodes that have not yet migrated to IPv6.

Answer: C

NEW QUESTION # 149
What is the primary function of an Intrusion Detection System (IDS) such as Snort or Suricata operating in network-based mode?

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

Answer: B

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 # 150
What is the purpose of the "ausearch" command in relation to the Linux audit framework?

A. To generate summary reports of audit statistics.
B. To search and filter existing audit log entries based on criteria such as key, user, or time range.
C. To add new audit rules to the running kernel.
D. To restart the auditd service.

Answer: B

Explanation:
The ausearch command is used to search through the audit log for specific events matching given criteria, such as a rule key (-k), a specific user (-ua), a time range (-ts/-te), or a system call.
This is particularly useful for investigating specific security events flagged by keyed audit rules.
aureport, in contrast, generates summarized, aggregate reports from audit data (such as counts of logins or file accesses), while auditctl is used to manage the rules themselves rather than search existing logs.

NEW QUESTION # 151
Which mount option prevents the execution of binaries located on the mounted filesystem?

A. ro
B. noexec
C. nosuid
D. nodev

Answer: B

NEW QUESTION # 152
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 number of newly created files
B. The maximum number of open file descriptors
C. The maximum size of written files
D. The maximum number of environment variables
E. The maximum number of user processes

Answer: B,C,E

NEW QUESTION # 153
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