Which of the following best describes a MAC spoofing attack? (Select the best answer.)

Last Updated on August 2, 2021 by Admin 3

Which of the following best describes a MAC spoofing attack? (Select the best answer.)

  • using GARP messages to associate an attacker’s MAC address with the IP address of a valid host on the network
  • sending forged frames with the intention of overwhelming a switch’s CAM table
  • replacing the IP address of a legitimate website with the IP address of a malicious website
  • using the MAC address of another host on the network in order to bypass port security measures
Explanation:
Of the choices available, using the Media Access Control (MAC) address of another host on the network in order to bypass port security measures best describes a MAC spoofing attack. Normally, the MAC address associated with a host corresponds to the unique, burnedin address (BIA) of its network interface. However, in a MAC spoofing attack, a malicious user virtually modifies the BIA to match the MAC address of the legitimate host on the network. Mimicking the MAC address of a known host can be used to overcome simple security measures such as Layer 2 access control lists (ACLs).
Using gratuitous Address Resolution Protocol (GARP) messages to associate an attacker’s MAC address with the IP address of a valid host on the network best describes an ARP poisoning attack, not a MAC spoofing attack. In an ARP poisoning attack, the attacker sends GARP messages to a host. The GARP messages associate the attacker’s MAC address with the IP address of a valid host on the network. Subsequently, traffic sent to the valid host address will go through the attacker’s computer rather than directly to the intended recipient.
Sending forged frames with the intention of overwhelming a switch’s content addressable memory (CAM) table best describes a MAC flooding attack, not a MAC spoofing attack. In a MAC flooding attack, a malicious user generates thousands of forged frames with the intention of overwhelming the switch’s CAM table, which stores learned MAC addresses. Once this table is flooded, the switch can no longer make intelligent forwarding decisions and all traffic is flooded. This allows the attacker to view all data sent through the switch because all traffic will be sent out each port. Implementing port security can help mitigate MAC flooding attacks.
Replacing the IP address of a legitimate website with the IP address of a malicious website best describes a Domain Name System (DNS) poisoning attack, not a MAC spoofing attack. DNS poisoning is an attack that modifies the DNS cache by providing invalid information. In a DNS poisoning attack, a malicious user attempts to exploit a DNS server by replacing the IP addresses of legitimate hosts with the IP address of one or more malicious hosts. Because the DNS cache of the attacked server is poisoned, it will reply to DNS requests with the IP address of the malicious hosts rather than the IP address of the legitimate hosts.
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