Whether we’re using wireless or wired network interfaces cards, our system only process the unicast, multicast, and broadcast traffic destined to our system. Windows systems, on the other hand, don’t come with libpcap and must therefore download and install “WinPcap,” which stands for “Windows Packet Capture.” Promiscuous Mode and Monitor Mode UNIX/Linux systems come with “libpcap,” which stands for “Promiscuous Library Capture.” This API is used to grab packets right off the network interface card. Wireshark uses a pcap (packet capture) API to capture packets. Before understanding how Wireshark works, it definitely helps to understand the OSI model, so be sure to familiarize yourself with how computers communicate with each other. If you’re already familiar with tcpdump or Tshark, then Wireshark will be simple to understand. As a packet analyzer, Wireshark’s functionality includes network troubleshooting, packet capture analysis, real-time network traffic observation, examining security problems, protocol implementation debugging, and reconnaissance. Wireshark is a GUI, cross-platform, open-source protocol and packet analyzer available for Microsoft Windows, Linux, Mac OS, BSD, Solaris, and some other Unix-like operating systems.
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