Gigabit Ethernet technology, as the newest high-speed Ethernet technology, brings to users an effective solution to improve the core network, the biggest advantage of this solution is inheriting the advantages of traditional Ethernet technology. Gigabit technology is still ether technology, which adopts the same frame format, frame structure, network protocol, full/half duplex working mode, flow control mode and wiring system with 10M Ethernet. Because this technology does not change the traditional Ethernet desktop application, the operating system, so can be with 10M or 100M Ethernet to work well together. Upgrading to Gigabit Ethernet eliminates the need to alter network applications, network management components, and Web operating systems to maximize investment. In addition, IEEE standards will support the maximum distance of 550 meters multimode fiber, the maximum distance of 70-kilometer single-mode fiber and the maximum distance of 100 meters coaxial cable. Gigabit Ethernet fills the 802.3 Ethernet/Fast Ethernet standard.