Match an echo reply
02An Echo Reply returns the request data along with its identifier and sequence number.
Related RFCs and changes
“Updates” changes part of an earlier RFC. “Obsoletes” replaces it. This list shows selected related documents.
DIAGRAMEcho or Echo Reply Message ↗
RFC 792 · Echo or Echo Reply MessageEXAMPLE
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03
Match the reply to the request using the echoed fields.
Match the reply to the request using the echoed fields.
Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
Read the updated RFC section ↗
Echo Request is type 8; Echo Reply is type 0.
- Echo Request is type 8; Echo Reply is type 0.
- A missing reply can mean loss or filtering; it is not proof that the host does not exist.
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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