Wireshark is the world’s most widely used network protocol analyzer, allowing users to "go deep" into network traffic at a microscopic level. Originally released in 1998 as Ethereal, it is a free and open-source tool maintained by the Wireshark Foundation. Core Capabilities Packet Capture: Intercepts data packets as they travel across various media, including Ethernet, Wireless LAN, Bluetooth, and USB. Deep Inspection: Decodes and displays thousands of protocols in a human-readable format, showing detailed information from the hardware level up to the application layer. Powerful Filtering: Uses a rich display filter language to isolate specific traffic, such as tcp.port == 443 or ip.addr == 192.168.1.1. Live & Offline Analysis: Can capture live traffic or open files from dozens of other capture programs like tcpdump and Microsoft Network Monitor. Common Use Cases Network Troubleshooting: Identifying performance bottlenecks, latency, and connectivity issues. Security Analysis: Detecting anomalous behavior, network scans, and indicators of malware or DoS attacks. Protocol Development: Debugging new applications or communication protocols by inspecting their network behavior. Education: Learning how network protocols like HTTP, DNS, and TCP work at the packet level.
