Apply the display filter wlan.channel to view the channels used by access points and clients. With Wireshark, you can analyze channel usage to identify potential improvements.
Optimizing channel usage can improve Wi-Fi performance and reduce interference. Case Study 5: Optimizing Wi-Fi Channel Usage Additionally, apply the filter wlan_code to find disassociation or deauthentication frames, which may reveal potential attacks or misconfigurations. Unencrypted frames may indicate a security vulnerability. Use the display filter wlan.fc.protected to identify encrypted and unencrypted frames. Wireshark can help identify potential security issues, such as rogue clients or unauthorized access. Case Study 4: Investigating Wi-Fi Security Incidents Look for patterns in how devices move between access points and identify any issues, such as frequent disconnections or slow transitions. To analyze roaming behavior, use the display filter wlan.addr to track the source and destination MAC addresses of devices. Roaming behavior refers to how devices switch between access points within a Wi-Fi network. High retransmission rates may indicate poor signal strength or interference. Additionally, examine the retransmission rate by applying the filter wlan.fc.retry. Long frame durations may indicate interference or congestion. To analyze Wi-Fi performance, use the display filter to view the duration of Wi-Fi frames. Slow Wi-Fi performance can be a result of interference, congestion, or misconfiguration. Case Study 2: Troubleshooting Wi-Fi Performance Issues Examine the SSIDs and MAC addresses, and compare them to your authorized access points list to identify any unauthorized devices. Set a display filter wlan.fc.type_subtype eq 8 to view beacon frames, which will reveal information about access points within range. By analyzing Wi-Fi traffic with Wireshark, you can detect and locate unauthorized access points. Unauthorized access points can pose significant security risks to a network. Case Study 1: Identifying Unauthorized Access Points In this article, we'll explore five real-world case studies that demonstrate the value of using Wireshark for Wi-Fi traffic analysis. Wireshark, a widely-used packet analysis tool, provides powerful features for capturing and analyzing Wi-Fi traffic. By analyzing Wi-Fi traffic, you can gain insights into network performance, identify security vulnerabilities, and troubleshoot connectivity issues. Wi-Fi traffic analysis is a critical skill for network administrators and security professionals.
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