其實..只要Cat 5e就可以了
http://www.nex1.com.tw/english/know...602.htm#gigabit
Benefits of Gigabit Ethernet: It solves bandwidth problems. Its primary use will be for backbones.
The medium will be fiber or Enhanced Category 5 100-Ohm cable.

http://www.nex1.com.tw/document/paper03.htm