18 lines
623 B
Markdown
18 lines
623 B
Markdown
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---
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tags: [networks]
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created: Monday, January 13, 2025
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---
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# ICMP Protocol
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The Internet Control Message Protocol operates alongside the
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[Internet Protocol](Internet_Layer_of_Internet_Protocol.md) at the
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[Transport Layer](Transport_Layer_of_Internet_Protocol.md).
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It doesn't carry any actual user data and thus there is no
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[Application Layer](Application_Layer_of_Internet_Protocol.md) processes above
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it. It's usage is primarily for diagnostics and debugging. When network problems
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occur, ICMP generates messages to report errors back to the source.
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Probably the most familiar tools related to ICMP is [Ping](Ping.md).
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