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Lpi 303-300 Exam Syllabus Topics:

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

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Lpi LPIC Exam 303: Security, version 3.0 Sample Questions (Q61-Q66):

NEW QUESTION # 61
What is the purpose of a DNSKEY record in DNSSEC?

A. To map an IP address to a hostname
B. To sign a DNS zone
C. To verify the authenticity of a DNS query
D. To provide information about a DNS server

Answer: B

NEW QUESTION # 62
What is a DoS attack?

A. An attack that exploits a vulnerability in software
B. An attack that aims to steal sensitive information
C. An attack that targets a specific user or organization
D. An attack that floods a network or server with traffic to make it unavailable

Answer: D

NEW QUESTION # 63
Which of the following commands adds users using SSSD's local service?

A. sss_local_adduser
B. sss-addlocaluser
C. sss_useradd
D. sss_adduser
E. sss_add

Answer: C

NEW QUESTION # 64
Which command displays currently listening TCP and UDP sockets along with the process ID and name of the associated program?

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

Answer: C

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 # 65
Which Fail2ban configuration file typically contains local, site-specific overrides that should not be modified in the default jail.conf file?

A. action.d/iptables.conf
B. filter.d/sshd.conf
C. jail.local
D. fail2ban.conf

Answer: C

Explanation:
Fail2ban's documentation recommends placing local, site-specific configuration overrides in jail.local (or files within jail.d/) rather than directly editing jail.conf, since jail.conf may be overwritten during package upgrades. Settings in jail.local take precedence over those in jail.conf.
The filter.d/ and action.d/ directories contain definitions for how to detect failures in specific log formats and how to execute a ban action, respectively, and are typically only edited when creating custom filters or actions.

NEW QUESTION # 66
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