How does Wireshark capture packets?

Wireshark captures packets using the following steps:

  1. Network Interface Selection: When you start Wireshark, you select a network interface (e.g., Ethernet, Wi-Fi) from which to capture traffic. You can choose a specific interface or select "any" to capture from all available interfaces.

  2. Promiscuous Mode: Wireshark often puts the selected network interface into promiscuous mode. This allows the interface to capture all packets on the network segment, not just those addressed to it.

  3. Packet Filtering: You can apply capture filters to limit the types of packets captured (e.g., only HTTP traffic on port 80). This helps focus on specific traffic of interest.

  4. Packet Capture: Once capturing starts, Wireshark collects packets as they traverse the network interface. It records details such as source and destination IP addresses, protocols, and payload data.

  5. Display and Analysis: Captured packets are displayed in real-time in Wireshark's interface, where you can analyze their contents, follow streams, and apply additional filters for deeper inspection.

This process allows users to monitor and analyze network traffic effectively. If you have more questions or need further clarification, feel free to ask!

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