Most of the fiber used in LANs is tight-buffered multimode cable.Tight-buffered cables have the buffering material that surrounds the cladding in direct contact with the cladding.

• 大部分使用在LAN的光纤是紧密-缓冲多模缆线，紧密-缓冲缆线有缓冲区物质围住被覆层而直接与被覆层接触。