Detecting MAC Spoofing Attacks

B.

Out of the given options, the best protocol to use to detect a MAC spoofing attack is Reverse Address Resolution Protocol (RARP).

MAC spoofing is a technique in which an attacker changes their network interface card's (NIC) MAC address to another MAC address to impersonate another device on the network. It is commonly used to perform Man-in-the-Middle (MitM) attacks and gain unauthorized access to network resources.

RARP is a protocol that maps a MAC address to an IP address. It is the opposite of Address Resolution Protocol (ARP), which maps an IP address to a MAC address. When a device wants to determine the MAC address of another device on the network, it sends an ARP request. If an attacker is using MAC spoofing, they will respond to ARP requests with a false MAC address.

To detect MAC spoofing using RARP, you can perform a RARP request to a device and compare the MAC address returned in the response with the known MAC address of that device. If the MAC addresses don't match, then there may be a MAC spoofing attack happening.

Internet Control Message Protocol (ICMP) is a protocol used for network management and troubleshooting, and it would not be useful for detecting MAC spoofing. Dynamic Host Configuration Protocol (DHCP) is used to assign IP addresses to devices on a network, and it would also not be useful for detecting MAC spoofing. Internet Message Access Protocol (IMAP) is used for email retrieval and would not be useful for detecting MAC spoofing either.