Can network monitoring slow down our network or computers?
Passive monitoring on a mirror port does not slow the network, because the sensor only receives a copy of the traffic and is not in the path. The switch makes the copy itself. Two things to check: that the switch can mirror the ports you choose without overloading the monitor port, and that the host running the sensor has enough capacity for the traffic volume. Inline products that sit in the traffic path, such as some intrusion prevention systems, can add delay or become a point of failure; NetSenX is not one of them. If you install the NetSenX agent directly on a busy server instead, watch its resource use for the first days and start with a less critical host.