For low and medium load values (i.e. low and low ), the Closest scheme achieves lower blocking probability compared to the other two schemes. The selection of the IT site for each request is based on the length of the paths from the source to the IT sites with available capacity. This way, shorter path and thus more efficient utilization of the network resources is achieved, leading to higher acceptance rate for the given load range. When considering high load conditions (i.e. high and high ), the IT blocking increases and the network blocking decreases