XK0-005 Domain 2: Security

Which permission on private key file is recommended?

Multiple choice — select one answer

Answer choices

  1. a. 600
  2. b. ban IP via iptables/nftables integration
  3. c. RPM/DEB repository signing
  4. d. 644 world readable private key bad

Architectural breakdown & explanation

Private keys should be user-read/write only.

Correct answer(s): a. 600

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

Official documentation & study links

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