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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	- System hardening - Authentication mechanisms
Application Security	- Secure software configuration - Container and service security
Network Security	- Firewalls (iptables, nftables) - Secure network services - VPN technologies
Cryptography	- Public key infrastructure (PKI) - Data encryption and signing - OpenSSL usage and configuration
Access Control	- Discretionary Access Control (DAC) - SELinux and AppArmor - Mandatory Access Control (MAC)

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Lpi LPIC Exam 303: Security, version 3.0 Sample Questions (Q16-Q21):

NEW QUESTION # 16
Which of the following database names can be used within a Name Service Switch (NSS) configuration file?(Choose THREE correct answers).

A. passwd
B. service
C. group
D. host
E. shadow

Answer: A,C,E

NEW QUESTION # 17
What is the purpose of a Certificate Revocation List (CRL)?

A. It lists certificates that have not yet been issued.
B. It lists all valid certificates currently trusted by a client.
C. It lists certificates that have been revoked by the issuing CA before their expiration date.
D. It replaces the need for certificate expiration dates.

Answer: C

Explanation:
A Certificate Revocation List (CRL) is a signed list published by a Certificate Authority that identifies certificates which have been revoked before their scheduled expiration date, for reasons such as key compromise or the certificate no longer being needed. Clients can download and check a CRL to determine whether a certificate they are relying on is still valid, though this approach has largely been supplemented or replaced in many contexts by the more efficient real- time OCSP protocol.

NEW QUESTION # 18
Which command-line tool is commonly used to test and verify TLS/SSL configuration and certificate details of a remote server?

A. ss -tlnp
B. nmap -sV
C. openssl s_client
D. tcpdump

Answer: C

Explanation:
The "openssl s_client" command connects to a remote server using TLS/SSL and displays detailed information about the negotiated protocol version, cipher suite, and the server's certificate chain, making it a common tool for troubleshooting and verifying HTTPS or other TLS- secured services. nmap's version detection can identify running services but does not provide the same depth of TLS handshake detail, tcpdump captures raw packets, and ss displays socket statistics rather than TLS-layer details.

NEW QUESTION # 19
What is the purpose of a Certificate Authority (CA)?

A. To store X.509 certificates
B. To decrypt X.509 certificates
C. To issue and sign X.509 certificates
D. To encrypt X.509 certificates

Answer: C

NEW QUESTION # 20
What is the purpose of an access control list in Linux?

A. To compress a file to save disk space
B. To specify fine-grained permissions for users and groups
C. To encrypt a file for secure transmission
D. To mark a file as executable

Answer: B

NEW QUESTION # 21
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