What is Dynamic ARP Inspection? Detail Explained

What is Dynamic ARP Inspection?

Dynamic ARP Inspection (DAI) is a security feature used to protect networks from malicious behavior associated with spoofing and poisoning of the Address Resolution Protocol (ARP).

DAI works by verifying that each ARP request and response on a secure network comes from a valid IP-to-MAC address binding. It does this by comparing the source IP address and MAC address of each packet against a secure table of approved IP-to-MAC bindings.

Any discrepancies found are logged and the packet is dropped, preventing malicious traffic from entering the network.

By examining the dark traits of human behavior, DAI provides an extra layer of security to protect networks by stopping attacks before they can get started.

DAI helps to ensure that only valid traffic is allowed into the network and prevents attackers from spoofing or poisoning ARP packets in order to gain access.

DAI also helps organizations comply with industry regulations such as HIPAA and PCI-DSS, which require strong security protocols to be in place.

What is the Difference Between Normal ARP and Dynamic ARP Inspection?

When it comes to ARP (Address Resolution Protocol), there are two main types:

  • normal ARP
  • dynamic ARP inspection

Normal ARP is the basic protocol used in most network systems, while dynamic ARP inspection provides an additional layer of security by verifying the authenticity of each incoming packet before allowing it access to the system.

Normal ARP is used to map physical IP addresses (IPv4) to their corresponding MAC (Media Access Control) addresses. When a computer transmits an ARP request, it broadcasts that request to all computers within the network in order to identify the device with the requested address. This process is relatively straightforward and can be easily exploited by attackers.

Dynamic ARP inspection, on the other hand, is a proactive security measure designed to prevent malicious ARP requests from entering a network. It works by intercepting any incoming packets and verifying their authenticity before allowing them access to the system.

The dynamic ARP inspection process also keeps track of all authorized IP-MAC address mappings and can detect any changes in the mapping. If a malicious ARP request is detected, then it is blocked from entering the system.

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