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Lpi 303-300 Exam Syllabus Topics:

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

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Lpi LPIC Exam 303: Security, version 3.0 Sample Questions (Q162-Q167):

NEW QUESTION # 162
What is the purpose of TSIG in DNS?

A. To encrypt DNS queries
B. To map a domain name to an IP address
C. To sign DNS messages for secure communication
D. To provide information about DNS servers

Answer: C

NEW QUESTION # 163
What is a certificate chain?

A. A chain of public and private keys used for encryption and decryption
B. A chain of digital signatures used to verify the authenticity of a certificate
C. A sequence of public and private keys used for encryption and decryption
D. A sequence of certificates used to verify the authenticity of a digital certificate

Answer: D

NEW QUESTION # 164
What type of activity does HID monitor for?

A. Unauthorized access attempts
B. File and folder changes
C. Network traffic
D. Malware infections

Answer: A

NEW QUESTION # 165
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 will not be accepted by programs that do not understand the listed extension.
B. This certificate may never be used to sign any other certificates.
C. This certificate may be used to sign certificates of subordinate certification authorities.
D. This certificate belongs to a certification authority.
E. This certificate may be used to sign certificates that are not also a certification authority.

Answer: C,D,E

NEW QUESTION # 166
Which command displays currently listening TCP and UDP sockets along with the process ID and name of the associated program?

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

Answer: A

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 # 167
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