Broadcast a question and receive a reply
02An Ethernet ARP request asks which station owns a target protocol address.
Terms in this drawing
Related RFCs and changes
“Updates” changes part of an earlier RFC. “Obsoletes” replaces it. This list shows selected related documents.
DIAGRAMPacket Reception ↗
RFC 826 · Packet ReceptionEXAMPLE
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03
A unicast reply supplies its sender IPv4 and hardware addresses.
A unicast reply supplies its sender IPv4 and hardware addresses.
Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
Read the updated RFC section ↗
Request opcode is 1; reply opcode is 2.
- Request opcode is 1; reply opcode is 2.
- The target replies to the requester’s link-layer address on the same hardware.
The drawing is a simplified worked example. Follow the linked RFC and its updates for implementation requirements.
Read the RFC section ↗Diagrams simplify the RFC. Read the linked sections for complete requirements.
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