An apparatus and method that use media packets, such as Real-time Transport Protocol (RTP), packets with a specially define profile to determine the route and round-trip-time information. The route is determined by transmitting by a first network endpoint one or a group of media packets having a number of hops equal to a predefined number and the network address of a second endpoint, incrementing the number of hops upon a non-media packet being received in response to the one or group by a network node because the number of hops was exceeded at that network node. After recording the identification of that network node and incrementing the number of hops, the network endpoint re-transmits the one or group of media packets. The round-trip-time information is determined by timestamp information inserted into the one or group of media packets by the first network endpoint and timestamp information inserted into another one or another group of media packets transmitted from the second network endpoint to the first network endpoint in response to receipt of the one or group of media packets.