Which of the following is a packet crafting tool?

• A. Scapy
• B. Wireshark
• C. Nmap
• D. Fiddler

Answer: (A)

Packet crafting is about constructing and sending custom network packets to test how protocols handle unusual data or to probe a network’s behavior. Scapy is a Python-based interactive tool built for this purpose: you can forge packets, layer by layer, modify fields, and then send them or capture replies. It’s designed to be programmable and flexible, so you can automate packet sequences, perform tests, and analyze responses, which is exactly what packet crafting involves.

Wireshark, by contrast, is a packet analyzer used to capture and inspect traffic that’s already on the wire; it doesn’t create or inject customized packets. Nmap focuses on discovering hosts and services, not on building or sending arbitrary packets. Fiddler acts as an HTTP proxy to inspect, modify, and debug web traffic, rather than crafting general network packets.