Why is DHCP snooping necessary when employing Dynamic ARP Inspection?

Why is DHCP snooping necessary when employing Dynamic ARP Inspection?

• A. It tracks user login attempts
• B. It prevents network congestion
• C. It validates ARP packets using a binding database
• D. It assigns IP addresses dynamically

Answer: (C)

Dynamic ARP Inspection (DAI) is a security feature that helps to protect the network against spoofing attacks by ensuring that only valid Address Resolution Protocol (ARP) requests and responses are processed. For DAI to function effectively, it needs a reliable method for validating ARP packets, which is where DHCP snooping comes into play. When DHCP snooping is enabled, the switch builds a binding database that contains information about the devices connected to the network, including their MAC addresses, IP addresses, and associated VLANs. This database is crucial because it serves as a reference point for validating the validity of ARP packets. With the binding database in place, DAI can check incoming ARP replies against this database to confirm that the MAC address and IP address combination is legitimate. If an ARP packet does not match an entry in the binding database, it can be discarded. This validation process prevents malicious actors from sending spoofed ARP packets that could lead to man-in-the-middle attacks or other security issues. In contrast, options relating to user login attempts, network congestion, and dynamic IP address assignment, while relevant in different contexts, do not directly contribute to the functionality of ARP validation that DAI requires. The relationship between DHCP snooping

Dynamic ARP Inspection (DAI) is a security feature that helps to protect the network against spoofing attacks by ensuring that only valid Address Resolution Protocol (ARP) requests and responses are processed. For DAI to function effectively, it needs a reliable method for validating ARP packets, which is where DHCP snooping comes into play.

When DHCP snooping is enabled, the switch builds a binding database that contains information about the devices connected to the network, including their MAC addresses, IP addresses, and associated VLANs. This database is crucial because it serves as a reference point for validating the validity of ARP packets.

With the binding database in place, DAI can check incoming ARP replies against this database to confirm that the MAC address and IP address combination is legitimate. If an ARP packet does not match an entry in the binding database, it can be discarded. This validation process prevents malicious actors from sending spoofed ARP packets that could lead to man-in-the-middle attacks or other security issues.

In contrast, options relating to user login attempts, network congestion, and dynamic IP address assignment, while relevant in different contexts, do not directly contribute to the functionality of ARP validation that DAI requires. The relationship between DHCP snooping