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XK0-005 Domain 2: Security

Which firewall tool on RHEL 8+ is default?

Multiple choice — select one answer

Answer choices

  1. a. firewalld (nftables backend)
  2. b. /etc/shadow
  3. c. /etc/passwd and critical system files
  4. d. ls -Z

Architectural breakdown & explanation

firewalld manages zones on RHEL family.

Correct answer(s): a. firewalld (nftables backend)

Exam domain: Domain 2: Security (21% weight on the official guide).

Official documentation & study links

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