Which of the following is the most secure method for remote administration of a Linux server?

Which of the following is the most secure method for remote administration of a Linux server?

  1. a) Telnet using root account
  2. b) SSH using password authentication
  3. c) SSH using key-based authentication
  4. d) VNC without encryption

From the Combined Bank Officer (IT) January 2026 – Written (BIBM) exam, question 29 of 115.

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