# How can an MSP discover all devices on a new client's network, and how quickly?

Watch the traffic passively for a few days: most devices reveal themselves within hours, and the rest within days, as they request addresses, resolve names and talk to servers. Put one sensor on a mirror port of the main switch, then compare what appears with the client's own list, the router's connected devices and the switch's port table. Expect surprises: forgotten servers, personal devices, a supplier's router in a cabinet. A device that never sends traffic, or sits on a segment you do not mirror, will not appear, so walk the site too. NetSenX's network map does this on every plan, Free included: devices with their announced names, first and last seen, and who talks to whom, without probing anything.

FAQ: [MSPs and MSSPs](https://netsenx.com/en/faq/msp) · https://netsenx.com/en/faq/how-can-an-msp-discover-all-devices-on-a-new-clients-network

## Read next

- https://netsenx.com/en/problems-we-solve
- https://netsenx.com/en/partners

## Related questions

- [What should an MSP check on a new client's network in the first week?](https://netsenx.com/en/faq/what-should-an-msp-check-on-a-new-clients-network-in-the-first-week)
- [How does an MSP get alerted when a client network shows signs of attack?](https://netsenx.com/en/faq/how-does-an-msp-get-alerted-when-a-client-network-shows-signs-of-attack)
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