Core network components interconnect other network components. AFSI provides solutions for communication systems based on fiber optic interconnect technology. Expanders exist to allow more complex interconnect topologies. RS-485 serves as physical layer for the AES3 digital audio interconnect. Ball bonding is limited to small diameter wires, suitable for interconnect application. There is one such ratio for each interconnect layer. These standards allow different networks in different countries to interconnect seamlessly. A switch operating as a network bridge may interconnect devices in a home or office. These crosslinks interconnect neighboring polymer chains, thereby conferring rigidity. This layer serves as a low-resistivity metallic "interconnect". Ethernet has replaced InfiniBand as the most popular system interconnect of TOP500 supercomputers. Nodes are connected by a high-speed interconnect called NUMAlink (originally marketed as CrayLink). Interface (DMI) links, but no QuickPath Interconnect (QPI) interface. PCI Express devices communicate via a logical connection called an "interconnect" or "link". These kind of groups more often than not interconnect with each other, forming larger networks.