English英语译成Chinese汉语 技术/工程设计 IT（信息技术） 10G Ethernet

"10GBase-T PHYs are very expensive and extremely power-hungry," says Karvat. "As a result, there's a variety of PHYs, including direct-attach copper which comes from the SFP+ [fibre-optic] community. It's a single lane of copper, not four like CX4, so it is easier and cheaper to cable, and more dense."
It will make it easier to build 10Gig switches, he adds: "Teranetics and Solarflare are both 6W per port, but SFP+ copper is 1W. A 12W solution is impossible in a switch, 6W is extremely challenging, but 1W is fine. There is absolutely no reason for CX4 users not to migrate to direct-attach. {Between them}, CX4 and direct-attach address the 80 percent of the market that's in-room."