The authors propose an interconnection topology suited to server-centric networks based on Twin graphs. The topology exploits graph theory to cost-effectively improve network scalability and resilience. The authors discuss datacenter network topology by comparing Twin interconnection topologies to different datacenter topologies (that is, Fat Tree, BCube, DCell, and Hypercube). Their results show that Twin topologies have a lower link cost than previous datacenter topologies, are scalable with fine granularity, and are efficient, fault tolerant, and resilient owing to their features, which enable traffic balancing under both normal and faulty operating conditions.