金属铜的价钱.当然要比玻璃贵得多。但是.在做成通信介质之后,铜缆可就要比玻璃做的光纤便宜了.相应地,交换机上的铜缆千兆口(电口)要比光纤千兆口(光口)便宜,铜缆千兆网卡要比光纤千兆网卡便宜。与千兆光口相比较,电口的便宜主要体现在两方面 The price of metallic copper is certainly much more expensive than glass. However, after the communication medium is made, the copper cable can be cheaper than the glass fiber. Correspondingly, the copper Gigabit port (electrical port) on the switch is cheaper than the fiber Gigabit port (optical port). Gigabit network cards are cheaper than fiber Gigabit network cards. Compared with the Gigabit optical port, the electrical port is mainly reflected in two aspects