Question 56

ARP spoofing

ARP spoofing best describes the attack that occurred in this scenario, where a host disguised itself as a switch to intercept data. This technique involves sending false ARP (Address Resolution Protocol) messages over a network to associate the attacker's MAC address with the IP address of a legitimate device, enabling data theft.

A) VLAN hopping

VLAN hopping is an attack that allows an attacker to access traffic from other VLANs by exploiting the configuration of the network switches. While this attack can lead to data breaches, it does not specifically involve a host masquerading as a switch, which is central to the scenario described.

B) Evil twin

An evil twin attack involves setting up a rogue access point that appears legitimate to deceive users into connecting to it. Although this attack can lead to data theft, it typically pertains to wireless networks and does not illustrate how a host impersonated a switch within a wired environment.

C) DNS poisoning

DNS poisoning is an attack that corrupts the DNS cache of a resolver, redirecting users to malicious sites instead of the intended ones. This method does not involve impersonation of network devices like switches and is therefore not applicable to the situation described in the question.

D) ARP spoofing

ARP spoofing is indeed the correct answer as it involves the manipulation of ARP messages to associate the attacker's MAC address with the IP address of a legitimate device, allowing data interception. This method directly relates to the scenario where a host disguises itself as a switch to steal company data.

Conclusion

ARP spoofing is the definitive answer as it accurately reflects the technique used in the described incident where a host impersonated a switch. The other options, while relevant to security incidents, do not match the specifics of the attack that involved disguising as a network device and intercepting data. Thus, they fail to explain the mechanics of the attack effectively.