Security fundamentals
30 practice questions with explanations — 15 free to try
PassNova has 30 Cisco CCNA practice questions on Security fundamentals, each with a clear explanation. A 15-question taster is free with no sign-up; the full bank is part of PassNova Premium. Updated for 2026.
Security fundamentals: example questions & answers
2 worked examples with answers and explanations below. Try 15 Cisco CCNA questions free in the browser; the full 30-question Security fundamentals bank is part of PassNova Premium.
What is the maximum number of MAC addresses port security allows by default on a switchport when enabled?
- A1✓
- B2
- C8
- D16
Answer: By default, port security allows a maximum of 1 MAC address per secured port.
Which port-security violation mode drops offending traffic, logs the event, and increments the violation counter without disabling the port?
- Aprotect
- Brestrict✓
- Cshutdown
- Ddisable
Answer: Restrict mode drops traffic, generates a log/SNMP message, and increments the counter; protect drops silently and shutdown err-disables.