Server performance and data center network traffic are growing dramatically and the total I/O bandwidth per rack is approaching 5 Tbit/s. New technologies and virtualization are transforming the network architecture within data centers. The 25G, 50G, 100G, 200G and 400G solutions that are being developed to support low cost links use new module form factors, PAM4 modulation, innovative manufacturing, photonic integration and silicon photonics. This session will cover the latest developments, including data center architectures, technologies and components.