Novel tools and techniques are provided for testing performance of network connections. In some cases, a method for testing performance of a network connection might comprise establishing a plurality of test points within one or more segments in the network connection. With a computer, performance of a selected segment of the network connection at one or more first test points may be tested. The selected segment might have a first endpoint and a second endpoint. The performance of one or more sub-segments of the selected segment at one or more second test points may also be tested with the computer. The computer may also determine an isolated performance of a particular one of the sub-segments based on the testing. In some instances, the method might further comprise determining, with the computer, that performance of the one or more sub-segments has affected performance of the network connection.