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ICMP

2 posts

Ping

Ping Timeout vs Destination Unreachable: Decoding Every Failure

Silent 100% loss and Destination Unreachable are different failures pointing at different problems. Every ping failure message decoded with live lab captures.

Jul 8, 2026 6 min read

Ping

How Ping Works: The ICMP Echo Exchange Explained

What actually happens between typing ping and the reply line, decoded field by field on a live 3-hop Cisco lab: ICMP echo, TTL, RTT, and jitter.

Jul 8, 2026 5 min read

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