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Where is ARP? is a easy quant interview question on networking.
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This easy networking question tests whether you understand the layering and encapsulation model of the TCP/IP stack, specifically how the Address Resolution Protocol (ARP) sits within Ethernet. It is a foundational concept for anyone working with network infrastructure or implementing low-level networking code.
The question probes your mental model of the OSI and TCP/IP layers: where ARP operates relative to Ethernet, how frames are structured, and how different protocols are identified and parsed at each layer. Networking engineers and systems programmers need to understand this to troubleshoot connectivity issues, write packet filters, or design efficient message delivery.