Computer networks notes
ICMP: ping & traceroute
The internet’s status-and-error protocol, and the tools you already use built on it. Every section is a drawn page beside a clear written explanation, about 9 minutes in all.
- Chapter 12 of 31
- About 9 minutes
- 7 sections
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In this chapter
- What is ICMP?
- Common ICMP messages
- How ping works
- TTL hits zero → Time Exceeded
- Traceroute’s clever trick
- Reading a traceroute
- ICMP has no ports
Next chapters
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