Which spoofing technique uses ARP messages to perform DoS attacks, also known as ARP poisoning?

Which spoofing technique uses ARP messages to perform DoS attacks, also known as ARP poisoning?

• A. Spoofing (ARP)
• B. Spoofing (DNS)
• C. Spoofing (IP)
• D. Spyware

Answer: (A)

ARP spoofing relies on the lack of authentication in the Address Resolution Protocol to map IP addresses to MAC addresses on a local network. By sending forged ARP replies, an attacker can poison the ARP caches of other devices, making them associate a victim or gateway IP with the attacker’s MAC. This misleads legitimate traffic, causing it to be misrouted, dropped, or flooded, which leads to a denial of service. ARP is used only within local networks, and ARP responses can update caches quickly, which is what makes this attack effective on a LAN. DNS spoofing and IP spoofing involve different mechanisms: DNS spoofing manipulates domain-name translations to redirect users to malicious hosts, not ARP tables; IP spoofing forges the source IP in packets rather than altering local MAC-to-IP mappings; spyware is unrelated to these network-layer spoofing techniques. In short, ARP spoofing is the spoofing technique that uses ARP messages to perform DoS.

ARP spoofing relies on the lack of authentication in the Address Resolution Protocol to map IP addresses to MAC addresses on a local network. By sending forged ARP replies, an attacker can poison the ARP caches of other devices, making them associate a victim or gateway IP with the attacker’s MAC. This misleads legitimate traffic, causing it to be misrouted, dropped, or flooded, which leads to a denial of service. ARP is used only within local networks, and ARP responses can update caches quickly, which is what makes this attack effective on a LAN.

DNS spoofing and IP spoofing involve different mechanisms: DNS spoofing manipulates domain-name translations to redirect users to malicious hosts, not ARP tables; IP spoofing forges the source IP in packets rather than altering local MAC-to-IP mappings; spyware is unrelated to these network-layer spoofing techniques. In short, ARP spoofing is the spoofing technique that uses ARP messages to perform DoS.