Traffic matrices (TM) reflect the volume of traffic that flows between
all possible pairs of sources and destinations in a network.
Estimation techniques based on partial information are used to populate
traffic matrices because amassing sufficient data from direct
measurements to populate a traffic matrix is typically prohibitively
expensive. The term Network Tomography was introduced in [12]
for the TM estimation problem when the partial data comes from
repeated measurements of the traffic flowing along directed links
of the network.