Introduction: The Double-Edged Sword of Packet Sniffing In the realm of ethical hacking, few tools are as misunderstood—or as visually compelling to demonstrate—as the network sniffer. A sniffer (or packet analyzer) is software or hardware that intercepts and logs traffic passing over a digital network. In the wrong hands, it becomes a surveillance device, capturing passwords, emails, and instant messages. In the right (ethical) hands, it is an indispensable diagnostic and security tool.