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Lpi 303-300 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Cryptography	8%	- X.509 Certificates and Public Key Infrastructures 1. Create and manage certificates 2. Manage certificate authorities 3. Certificate revocation and validation - Data Encryption 1. Secure data transmission 2. Encrypt files and storage devices 3. Use LUKS and dm-crypt - OpenPGP 1. Web of trust concepts 2. Sign and encrypt data 3. Manage GnuPG keys
Topic 2: Host Security	9%	- Host Hardening 1. Service hardening 2. Secure boot process 3. Kernel runtime protection - Resource Control 1. cgroups 2. ulimits 3. Process resource management - Host Intrusion Detection 1. Rootkit detection tools 2. AIDE integrity checking 3. Linux Audit system 4. Malware detection
Topic 3: Threats and Vulnerability Assessment	3%	- Threat Analysis 1. Network threats 2. Host-based threats 3. Application threats 4. Credential and confidentiality threats - Vulnerability Assessment 1. OpenVAS 2. Risk identification 3. Security scanning
Topic 4: Access Control	8%	- Mandatory Access Control 1. SELinux management 2. Policy enforcement 3. AppArmor configuration - Authentication and Authorization 1. Multi-factor authentication 2. PAM 3. Centralized authentication - Discretionary Access Control 1. POSIX ACLs 2. Extended attributes 3. File permissions
Topic 5: Network Security	12%	- Network Hardening 1. TCP wrappers and service restrictions 2. Secure network services - Network Intrusion Detection 1. Snort 2. Kismet 3. tcpdump 4. Wireshark - Packet Filtering 1. NAT and connection tracking 2. iptables and ip6tables 3. nftables awareness 4. IP sets - Virtual Private Networks 1. OpenVPN 2. WireGuard 3. IPsec and strongSwan

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Lpi LPIC Exam 303: Security, version 3.0 Sample Questions (Q51-Q56):

NEW QUESTION # 51
What is a man-in-the-middle attack?

A. An attack that aims to steal sensitive information
B. An attack that targets a specific user or organization
C. An attack that floods a network or server with traffic to make it unavailable
D. An attack that intercepts communications between two parties to steal information

Answer: D

NEW QUESTION # 52
Which of the following DNS record types can the command dnssec-signzone add to a zone?
(Choose THREE correct answers.)

A. NSEC
B. NSEC3
C. ASIG
D. NSSIG
E. RRSIG

Answer: A,B,E

NEW QUESTION # 53
A LUKS device was mapped using the command: cryptsetup luksOpen/dev/sda1 crypt-vol Given that this device has three different keys, which of the following commands deletes only the first key?

A. cryptsetup luksDelKey /dev/sda 1 0
B. cryptsetup luksDelKey / dev /mapper/crypt- vol 1
C. cryptsetup luksDelkey /dev/sda 1 1
D. cryptsetup luksDelKey / dev /mapper/crypt- vol 0

Answer: C

NEW QUESTION # 54
In nftables, what is the purpose of a "base chain" as opposed to a "regular chain"?

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

Answer: C

Explanation:
A base chain in nftables is attached directly to one of the underlying netfilter hooks (such as prerouting, input, forward, output, or postrouting), which allows packets traversing the network stack at that point to be evaluated against the chain's rules. A regular chain, by contrast, is not attached to any hook and can only be reached when explicitly called (jumped or goto'd) from another chain, functioning similarly to a subroutine used for rule organization.

NEW QUESTION # 55
What is the purpose of NSEC3 in DNSSEC?

A. To authenticate a DNS server
B. To provide information about DNSSEC key signing keys
C. To sign a DNS zone
D. To prevent zone enumeration

Answer: D

NEW QUESTION # 56
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