Kai

Network operations and troubleshooting

7n4.cn author focused on network operations, including switches, access points, and wireless controllers. The articles follow practical checks that readers can reproduce.

Articles by this author

A MAC Address Is Flapping Between Switch Ports: Do Not Assume a Loop Yet2026-10-08 22:12:17 UTC
The AP Shows the Client Online, but the Switch Has No MAC Entry2026-10-07 16:04:59 UTC
Why a MAC Address Lookup Returns Nothing or the Wrong Vendor2026-10-05 14:00:00 UTC
How MAC Addresses Are Assigned in Virtual Machines and Containers2026-10-04 14:00:00 UTC
Bluetooth Addresses Versus WiFi MAC Addresses2026-10-04 10:00:00 UTC
Filtering Captures by MAC Address in Wireshark and tcpdump2026-10-03 10:00:00 UTC
Changing a MAC Address on Each Platform, and the Risks2026-10-02 10:00:00 UTC
Locating a Device on Your Network by MAC Address2026-10-01 10:00:00 UTC
Duplicate MAC Addresses: Symptoms and How to Track Them Down2026-09-26 10:00:00 UTC
How to Find a Device's MAC Address: Windows, Mac, iPhone, Android, Router2026-07-05 03:21:39 UTC

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