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sources/news/20190905 USB4 gets final approval, offers Ethernet-like speed.md
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[#]: collector: (lujun9972)
[#]: translator: (geekpi)
[#]: reviewer: ( )
[#]: publisher: ( )
[#]: url: ( )
[#]: subject: (USB4 gets final approval, offers Ethernet-like speed)
[#]: via: (https://www.networkworld.com/article/3435113/usb4-gets-final-approval-offers-ethernet-like-speed.html)
[#]: author: (Andy Patrizio https://www.networkworld.com/author/Andy-Patrizio/)
USB4 gets final approval, offers Ethernet-like speed
======
USB4 could be a unifying interface that eliminates bulky cables and oversized plugs and provides throughput that satisfies everyone laptop users to server administrators.
Intel
The USB Implementers Forum (USB-IF), the industry consortium behind the development of the Universal Serial Bus (USB) specification, announced this week it has finalized the technical specifications for USB4, the next generation of the spec.
One of the most important aspects of USB4 (they have dispensed with the space between the acronym and the version number with this release) is that it merges USB with Thunderbolt 3, an Intel-designed interface that hasn’t really caught on outside of laptops despite its potential. For that reason, Intel gave the Thunderbolt spec to the USB consortium.
Unfortunately, Thunderbolt 3 is listed as an option for USB4 devices, so some will have it and some won’t. This will undoubtedly cause headaches, and hopefully all device makers will include Thunderbolt 3.
**[ Also read: [Your hardware order is ready. Do you want cables with that?][1] ]**
USB4 will use the same form factor as USB type-C, the small plug used in all modern Android phones and by Thunderbolt 3. It will be backwards compatible with USB 3.2, USB 2.0, as well as Thunderbolt. So, just about any existing USB type-C device can connect to a machine featuring a USB4 bus but will run at the connecting cable’s rated speed.
### USB4: Less bulk, more speed
Because it supports Thunderbolt 3, the new connection will support both data and display protocols, so this could mean the small USB-C port replacing the big, bulky DVI port on monitors, and monitors coming with multiple USB4 ports to act as a hub.
Which gets to the main point of the new standard: It offers dual-lane 40Gbps transfer speed, double the rate of USB 3.2, which is the current spec, and eight times that of USB 3. That’s Ethernet speed and should be more than enough to keep your high-definition monitor fed with plenty of bandwidth for other data movement.
USB4 also has better resource allocation for video, so if you use a USB4 port to move video and data at the same time, the port will allocate bandwidth accordingly. This will allow a computer to use both an external GPU in a self-contained case, which have come to market only because of Thunderbolt 3, and an external SSD.
**[ [Get certified as an Apple Technical Coordinator with this seven-part online course from PluralSight.][2] ]**
This could open up all kinds of new server designs because large, bulky devices, such as GPUs or other cards that won’t go easily into a 1U or 2U case, can now be externally attached and run at speeds comparable to an internal device.
Of course, it will be a while before we see PCs with USB4 ports, never mind servers. It took years to get USB 3 into PCs, and uptake for USB-C has been very slow. USB 2 thumb drives are still the bulk of the market for those devices, and motherboards are still shipping with USB 2 on them.
Still, USB4 has the potential to be a unifying interface that gets rid of bulky cables that have oversized plugs and provides throughput that can satisfy everyone from a laptop user to a server administrator.
Join the Network World communities on [Facebook][3] and [LinkedIn][4] to comment on topics that are top of mind.
--------------------------------------------------------------------------------
via: https://www.networkworld.com/article/3435113/usb4-gets-final-approval-offers-ethernet-like-speed.html
作者：[Andy Patrizio][a]
选题：[lujun9972][b]
译者：[译者ID](https://github.com/译者ID)
校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
[a]: https://www.networkworld.com/author/Andy-Patrizio/
[b]: https://github.com/lujun9972
[1]: https://www.networkworld.com/article/3278052/your-hardware-order-is-ready-do-you-want-cables-with-that.html
[2]: https://pluralsight.pxf.io/c/321564/424552/7490?u=https%3A%2F%2Fwww.pluralsight.com%2Fpaths%2Fapple-certified-technical-trainer-10-11
[3]: https://www.facebook.com/NetworkWorld/
[4]: https://www.linkedin.com/company/network-world

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[#]: collector: (lujun9972)
[#]: translator: (geekpi)
[#]: reviewer: ( )
[#]: publisher: ( )
[#]: url: ( )
[#]: subject: (USB4 gets final approval, offers Ethernet-like speed)
[#]: via: (https://www.networkworld.com/article/3435113/usb4-gets-final-approval-offers-ethernet-like-speed.html)
[#]: author: (Andy Patrizio https://www.networkworld.com/author/Andy-Patrizio/)
USB4 获得最终批准，提供类似以太网的速度
======
USB4 会是一个统一的接口，可以淘汰笨重的电缆和超大的插头，并提供满足从笔记本电脑用户到服务器管理员的每个人的吞吐量。
USB 开发者论坛 （USB-IF） 是通用串行总线 （USB） 规范开发背后的行业协会，本周宣布了它已经完成了下一代 USB4 的技术规范。
USB4 最重要的一个方面（它们在此版本中省略了首字母缩略词和版本号之间的空格）是它将 USB 与 Intel 设计的接口 Thunderbolt 3 融合在了一起，它尽管有潜力，但在除了笔记本之外并未真正流行起来。出于这个原因，Intel 向 USB 联盟提供了 Thunderbolt 规范。
不幸的是，Thunderbolt 3 被列为 USB4 设备的一个选项，因此有些设备会有，有些则不会。这无疑会引起头疼，希望所有设备制造商都会包括 Thunderbolt 3。
USB4 will use the same form factor as USB type-C, the small plug used in all modern Android phones and by Thunderbolt 3. It will be backwards compatible with USB 3.2, USB 2.0, as well as Thunderbolt. So, just about any existing USB type-C device can connect to a machine featuring a USB4 bus but will run at the connecting cable’s rated speed.
### USB4：体积更小，速度更快
因为它支持 Thunderbolt 3，所以新连接将同时支持数据和显示协议，因此这可能意味着小型 USB-C 端口取代了显示器上庞大的 DVI 端口，而显示器则带有多个 USB4 端口来作为集线器。
新标准的主要内容：它提供双通道 40Gbps 传输速度，是当前 USB 3.2 规格的两倍，是 USB 3 的八倍。这个以太网的速度，应该足够给你的高清显示器以及其他数据传输提供足够的带宽。
USB4 对视频还有更好的资源分配，因此如果你使用 USB4 端口同时传输视频和数据，端口将相应地分配带宽。这将允许计算机同时使用外部独立 GPU（因为有 Thunderbolt 3，它已经上市 ） 和外部 SSD。
这可能会启发各种新的服务器设计，因为大型、笨重的设备，如 GPU 或其他不易进入 1U 或 2U 机箱的卡，现在可以外部连接并以与内部设备相当的速度运行。
当然，我们看到配备 USB4 端口的电脑还需要一段时间，更别说服务器了。将 USB 3 用于 PC 花费了数年时间，而 USB-C 的采用速度非常缓慢。 USB 2 的 U 盘仍然是这些设备的主要市场，并且主板仍然带有 USB 2。
尽管如此，USB4 还是有可能成为一个统一的接口，可以摆脱拥有超大插头的笨重电缆，并提供满足从笔记本电脑用户到服务器管理员的每个人的吞吐量。
在 [Facebook][3] 和 [LinkedIn][4] 上加入 Network World 社区，评论最新主题。
--------------------------------------------------------------------------------
via: https://www.networkworld.com/article/3435113/usb4-gets-final-approval-offers-ethernet-like-speed.html
作者：[Andy Patrizio][a]
选题：[lujun9972][b]
译者：[geekpi](https://github.com/geekpi)
校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
[a]: https://www.networkworld.com/author/Andy-Patrizio/
[b]: https://github.com/lujun9972
[3]: https://www.facebook.com/NetworkWorld/
[4]: https://www.linkedin.com/company/network-world