Packet Sniffing & Tools (tcpdump, Wireshark)

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Examples

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Common Pitfalls

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Interview Questions

Beginner

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Intermediate

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Senior

Q: [Senior-level system design or complex scenario question]

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• OSI Model (7 Layers) - Packet sniffing captures data at different OSI layers, understanding the model helps interpret captured packets

• TCP vs UDP - Packet sniffers capture TCP and UDP packets, understanding transport protocols helps analyze captured traffic

• HTTP/1 vs HTTP/2 vs HTTP/3 - Packet sniffers can analyze HTTP traffic, understanding HTTP versions helps interpret captured packets

• TLS/SSL Handshake - Encrypted traffic limits packet sniffing, understanding TLS explains encryption's impact on analysis

• ARP & Reverse ARP - Packet sniffers capture ARP packets, understanding ARP helps analyze network traffic

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