Optical-fiber networks are ubiquitous in data center networks including LANs and SANs as well as the interconnections between buildings. But while optical fiber is a constant, the physical construction and throughput capacity of fiber-optic cables and connecting hardware have evolved to meet the ever-more-demanding requirements of these data center networks. This roundtable discussion explores recent developments in this evolution, covering changes in cable constructions and fiber counts, connectivity hardware and methods, as well as termination best practices.