Which option is a security application that detects ARP-based attacks and complements firewall protection?

Which option is a security application that detects ARP-based attacks and complements firewall protection?

• A. DAI
• B. XArp
• C. TMAC
• D. double tagging

Answer: (B)

ARP spoofing undermines network security by misbinding IP addresses to attacker MACs, which can lead to man-in-the-middle attacks or traffic disruption. To defend against this at the data-link layer, you need tools that monitor and verify ARP mappings rather than rely solely on a firewall that operates higher up in the stack. XArp is a dedicated ARP security tool designed to detect ARP-based attacks. It continuously analyzes ARP traffic, validates IP-to-MAC bindings, and flags or blocks suspicious ARP replies. By maintaining a trusted map of devices and their MAC addresses, it can identify spoofing attempts and provide alerts or automated responses. This complements firewall protection by catching ARP manipulation before it can redirect or intercept traffic, reducing the chance that malicious frames ever reach firewall filters. In short, it strengthens local network trust by validating ARP information, which the firewall alone cannot reliably enforce since ARP operates at the layer where those mappings are established. Dynamic ARP Inspection is a switch feature that enforces ARP checks within the network device, but it is a capability baked into hardware rather than a standalone security application like XArp. The remaining options do not address ARP attack detection at all, with double tagging describing a VLAN-hopping technique and TMAC not being a recognized ARP security tool.

ARP spoofing undermines network security by misbinding IP addresses to attacker MACs, which can lead to man-in-the-middle attacks or traffic disruption. To defend against this at the data-link layer, you need tools that monitor and verify ARP mappings rather than rely solely on a firewall that operates higher up in the stack.

XArp is a dedicated ARP security tool designed to detect ARP-based attacks. It continuously analyzes ARP traffic, validates IP-to-MAC bindings, and flags or blocks suspicious ARP replies. By maintaining a trusted map of devices and their MAC addresses, it can identify spoofing attempts and provide alerts or automated responses. This complements firewall protection by catching ARP manipulation before it can redirect or intercept traffic, reducing the chance that malicious frames ever reach firewall filters. In short, it strengthens local network trust by validating ARP information, which the firewall alone cannot reliably enforce since ARP operates at the layer where those mappings are established.

Dynamic ARP Inspection is a switch feature that enforces ARP checks within the network device, but it is a capability baked into hardware rather than a standalone security application like XArp. The remaining options do not address ARP attack detection at all, with double tagging describing a VLAN-hopping technique and TMAC not being a recognized ARP security tool.