How do we see personal devices connected to the office network?
By looking at what actually connects to your network, rather than at your asset list. Personal phones, laptops and smart devices often join the office Wi-Fi or a spare network socket without anyone recording it. On every plan, the NetSenX network map lists the devices seen on monitored segments, with the name each device announces and when it was first and last seen, so unfamiliar devices stand out; if one of them scans the network or keeps contacting an unknown outside server, an alert follows. A network sensor cannot tell who owns a device or whether it is allowed: compare the list with your inventory and policy. The lasting fix is structural: a separate guest network for personal devices, and network access control on the office network where you can.
General information, not legal advice. National laws can add to the EU texts quoted here, for example deadlines, forms or reporting channels: check your own country's rules.
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