Home / Definitions / Loopback Test

Loopback Test

Webopedia Staff
Last Updated May 24, 2021 7:47 am
A diagnostic procedure in which a signal is transmitted and returned to the sending device after passing through all or a portion of a network or circuit. The returned signal is compared with the transmitted signal in order to evaluate the integrity of the equipment or transmission path. A computer needs a loopback plug that is inserted into a port in order to perform a loopback test.