🌐 Virtual ICMP Laboratory RFC 792

Internet Control Message Protocol — Explore Echo Request/Reply, Destination Unreachable, Time Exceeded & Packet Analysis

🧪 ICMP Packet Simulator
💡 Ready. Click any ICMP packet type to simulate transmission and observe protocol behavior.
📖 ICMP Theory & Live Lab
⚡ ICMP Message Format:
[ Type (8/0/3/11) | Code | Checksum | Rest of Header ]
• Echo (Type 8) → Echo Reply (Type 0)
• Destination Unreachable (Type 3) — Network/Host/Port
• Time Exceeded (Type 11) — TTL expired in transit
➤ Each click generates virtual packet + protocol analysis
08162431 Type Code Checksum Rest of Header (Identifier, Sequence, etc) ↳ Echo: ID/Seq | Unreach: unused | TimeEx: unused

🔍 ICMP header structure (simulated analysis)

📡 ICMP Packet Exchange & Logs
[init]SystemVirtual ICMP lab started. Send packets to observe live protocol simulation.
0
Echo Tx/Rx
0
Error Msgs
0
Total ICMP
💡 Educational Insight: ICMP is used for diagnostics and error reporting. Ping uses Echo Request (type 8) and expects Echo Reply (type 0). Destination Unreachable informs source about routing/port issues. Time Exceeded reveals TTL expiration — crucial for traceroute.
🧪 Virtual Laboratory — Simulates ICMP messages with realistic behavior. Each packet triggers a simulated network response based on ICMP semantics.