Transmitting address resolution requests to each IP in the broadcast domain efficiently confirms the physical presence of devices on a local network. This approach avoids issues encountered by half-open efforts, which can be filtered by security products, and repeated echo requests, which can be blocked or yield incomplete data. Attempts to retrieve zone data do not verify activity and usually require a misconfiguration to provide meaningful results.
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What is an Address Resolution Request?
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Why are address resolution requests more reliable than ping for identifying active systems?
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What is a broadcast domain, and how does it relate to address resolution?