Non-intrusive / agentless network device identification

Maintaining a database of a plurality of time series data sets, wherein each time series data set is associated to a previously known computer device of a computer network; detecting a connection request from a second computer device of the computer network; collecting one or more new data sets related to the second computer device; comparing the one or more new data sets with one or more time series data sets; calculating one or more value scores related to the plurality of time series data sets based on the comparison; and determining a device association score based on the calculated one or more value scores related to the plurality of time series data sets, wherein the device association score determines an association level between the previously known computer device and the second computer device of the computer network.