# Do I need a hardware appliance on every site?

No NetSenX appliance is needed: the agent is software that runs on a host you choose. One agent connected to a SPAN or TAP port watches the whole segment and counts as one device.

FAQ: [OT and IoT](https://netsenx.com/en/faq/ot) · https://netsenx.com/en/faq/do-i-need-a-hardware-appliance-on-every-site

## Read next

- https://netsenx.com/en/ot-network-monitoring
- https://netsenx.com/en/compare

## Related questions

- [Does NIS2 cover OT networks?](https://netsenx.com/en/faq/does-nis2-cover-ot-networks)
- [Can network monitoring break our PLCs?](https://netsenx.com/en/faq/can-network-monitoring-break-plcs)
- [Do IoT devices such as cameras and printers need monitoring?](https://netsenx.com/en/faq/do-iot-devices-need-monitoring)
- [Are cameras on their own VLAN still a risk?](https://netsenx.com/en/faq/are-cameras-on-their-own-vlan-still-a-risk)
- [How do I detect attacks on PLCs in a small factory?](https://netsenx.com/en/faq/how-to-detect-attacks-on-plcs-in-a-small-factory)