Although rarely used in extreme conditions, fiber optic is a good choice at low temperatures – e. In cold. Fiber optic cold connection, also known as mechanical splicing, is a widely used method of connecting optical fibers in a network. Copper cables, notably Categories 5e, 6, and 6a, are prevalent in networking for their versatility in supporting voice, data, and video transmissions. Cat 5e is designed for. Network cable connectors have various types and work for certain purposes.