Which Cisco solution helps prevent ARP spoofing and ARP poisoning attacks?

Which Cisco solution helps prevent ARP spoofing and ARP poisoning attacks?

• A. Dynamic ARP Inspection
• B. VLAN Access Control Lists
• C. Port Security
• D. MAC Address Filtering

Answer: (A)

Dynamic ARP Inspection (DAI) is a security feature used in Cisco networks that helps prevent ARP spoofing and ARP poisoning attacks. These types of attacks occur when a malicious actor sends false ARP messages over a network, associating their own MAC address with the IP address of another device, which can lead to unauthorized access or data interception. Dynamic ARP Inspection works by intercepting ARP requests and responses on the network and ensuring that they match the information contained in the DHCP snooping binding database. This binding database contains a record of which IP addresses are assigned to which MAC addresses, providing a verified mapping that the switch can use to validate incoming ARP messages. If an ARP message does not match the binding information, DAI will drop the packet, thereby mitigating the risk of ARP spoofing and poisoning. In contrast, other security measures mentioned, such as VLAN Access Control Lists, Port Security, and MAC Address Filtering, serve different purposes within a network security framework. VLAN Access Control Lists focus on controlling traffic between different VLANs, Port Security restricts access to a switch port based on MAC addresses, and MAC Address Filtering allows or denies packets based on MAC address criteria. While these features enhance overall network security, they do

Dynamic ARP Inspection (DAI) is a security feature used in Cisco networks that helps prevent ARP spoofing and ARP poisoning attacks. These types of attacks occur when a malicious actor sends false ARP messages over a network, associating their own MAC address with the IP address of another device, which can lead to unauthorized access or data interception.

Dynamic ARP Inspection works by intercepting ARP requests and responses on the network and ensuring that they match the information contained in the DHCP snooping binding database. This binding database contains a record of which IP addresses are assigned to which MAC addresses, providing a verified mapping that the switch can use to validate incoming ARP messages. If an ARP message does not match the binding information, DAI will drop the packet, thereby mitigating the risk of ARP spoofing and poisoning.

In contrast, other security measures mentioned, such as VLAN Access Control Lists, Port Security, and MAC Address Filtering, serve different purposes within a network security framework. VLAN Access Control Lists focus on controlling traffic between different VLANs, Port Security restricts access to a switch port based on MAC addresses, and MAC Address Filtering allows or denies packets based on MAC address criteria. While these features enhance overall network security, they do