A hacker, who posed as a heating and air conditioning specialist, was able to install a sniffer program in a switched environment network. Which attack could the hacker use to sniff all of the…

Fraggle is a UDP-based amplification denial-of-service attack that floods a target with UDP echo replies; it does not enable packet sniffing on a switched network.

Switches normally forward traffic only to the port associated with the destination MAC address using their Content Addressable Memory (CAM) table. A MAC Flood attack sends thousands of frames with spoofed source MAC addresses, exhausting the CAM table. Once the table is full, the switch enters a fail-open state and broadcasts all incoming frames out every port, effectively behaving like a hub and exposing all network traffic to the attacker's sniffer.

Smurf is an ICMP-based amplification DDoS attack that floods a victim with ping replies; it is not a technique for capturing traffic in a switched environment.

Tear Drop is an IP fragmentation attack that sends malformed overlapping packet fragments to crash vulnerable operating systems; it does not enable traffic sniffing.