LPIC 3 Linux Enterprise Security Quiz

1. Which authentication method uses public and private keys for SSH?

Key-based authentication

Password authentication

Token authentication

Biometric authentication

2. What does the setuid bit allow executables to do?

Run with the permissions of the file owner

Execute multiple times simultaneously

Access network resources

Modify system configuration files

3. Which tool is commonly used for vulnerability scanning on Linux systems?

OpenVAS

Nmap

Ping

Dig

4. What is the purpose of fail2ban in enterprise security?

Monitor and block repeated failed login attempts

Encrypt network traffic

Manage SSL certificates

Configure DNS servers

5. Which command manages user group membership on Linux?

Usermod or groupmod

Passwd

Chmod

Chown

6. What does FIPS 140-2 compliance require for cryptographic modules?

Validated security standards and testing

Open-source code availability

Unlimited encryption key length

No password requirements

7. Which utility is used to set up disk encryption using LUKS?

Cryptsetup

Diskutil

Fdisk

Partprobe

8. What is the primary function of iptables in Linux security?

Configure firewall rules and packet filtering

Manage user permissions

Encrypt file systems

Monitor system performance

9. Which log file typically records authentication attempts on Linux?

/var/log/auth.log

/var/log/kernel.log

/var/log/system.log

/var/log/access.log

10. What does AIDE (Advanced Intrusion Detection Environment) monitor?

File integrity changes

Network connections

User login attempts

System memory usage

11. Which protocol is used for secure remote shell access on Linux systems?

SSH

Telnet

FTP

HTTP

12. What is the default SSH port number?

22

21

23

25

13. Which command is used to manage SSL/TLS certificates on Linux servers?

Openssl

Certmgr

Sslconfig

Tlsadmin

14. What does AppArmor provide as an alternative to SELinux?

Mandatory access control via profile-based restrictions

Network address translation

Disk encryption utilities

User account management

15. Which tool is used to audit file and directory permissions on Linux?

Ls -l

Netstat

Tcpdump

Iptables

16. What is the purpose of the /etc/sudoers file?

Define which users can execute commands as root

Store encrypted passwords

Configure network interfaces

Manage system log files

17. Which encryption standard is recommended for securing data at rest in enterprise environments?

AES-256

DES

MD5

SHA-1

18. What does PAM (Pluggable Authentication Modules) allow administrators to do?

Customize authentication mechanisms without recompiling

Encrypt all network traffic

Manage firewall rules

Configure disk partitions

19. Which file contains user account and password information on Linux?

/etc/shadow

/etc/passwd

/etc/users

/etc/accounts

20. What is the primary purpose of SELinux in enterprise Linux security?

Mandatory access control enforcement

Firewall configuration management

Network packet filtering

User password hashing