Sniffing, Social Engineering & DoS
34 practice questions with explanations — 15 free to try
PassNova has 34 Certified Ethical Hacker (CEH) practice questions on Sniffing, Social Engineering & DoS, 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.
Sniffing, Social Engineering & DoS: example questions & answers
2 worked examples with answers and explanations below. Try 15 Certified Ethical Hacker (CEH) questions free in the browser; the full 34-question Sniffing, Social Engineering & DoS bank is part of PassNova Premium.
On a switched network, which attack floods the switch's CAM table to force it to behave like a hub, allowing the attacker to capture traffic?
- ADNS spoofing
- BSmurf attack
- CMAC flooding✓
- DARP poisoning
Answer: MAC flooding overwhelms the switch's limited CAM table so it fails open and broadcasts frames out all ports, letting the attacker sniff traffic not intended for them.
In an ARP poisoning attack, what does the attacker send to associate their MAC address with the victim's or gateway's IP address?
- ATCP RST packets
- BForged DNS responses
- CGratuitous/spoofed ARP replies✓
- DICMP redirect messages sent to the victim host
Answer: The attacker sends spoofed ARP replies that map their own MAC address to a target IP (such as the default gateway), redirecting traffic through the attacker for a man-in-the-middle position.