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25 Gigabit Ethernet (25GbE) and 50 Gigabit Ethernet (50GbE) are proposed standards for Ethernet connectivity in a datacenter environment. An industry consortium has been formed to promote the technology and IEEE 802 workgroup has formed to develop the standard.〔〔 The draft uses technology defined for 100 Gigabit Ethernet implemented as four 25-Gbit/s lanes (IEEE 802.3bj).〔〔 IEEE 802.3 has formed an 802.3by task force〔(IEEE 802.3by 25 Gb/s Ethernet Task Force )〕 with the objectives to define:〔http://www.ieee802.org/3/by/P802_3by_Objectives.pdf〕 * a single-lane 25 Gbit/s 25GBASE-KR PHY for printed circuit backplanes * a single-lane 25 Gbit/s 25GBASE-CR-S PHY for 3 m twin-ax cables (in-rack) * a single-lane 25 Gbit/s 25GBASE-CR-L PHY for 5 m twin-ax cables (inter-rack) * a single-lane 25 Gbit/s 25GBASE-SR PHY for 100 m OM4 or 70 m OM3 multi-mode optical fiber Standards are expected by fall 2016. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「25 Gigabit Ethernet」の詳細全文を読む スポンサード リンク
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