Core Viewpoint - The complexity of USB standards has become widely recognized, leading to confusion among consumers and industry professionals alike. The introduction of the USB4 standard was expected to simplify this situation, but progress has not been smooth [1]. Group 1: USB Standard Evolution - USB standards have undergone multiple updates, with USB 2.0 supporting speeds up to 480 Mbps, USB 3.x series introduced in 2008, and USB 4 series launched in 2019 with speeds up to 80 Gbps [2]. - The introduction of "Gen" symbols (e.g., Gen 1, Gen 2) has complicated the identification of USB versions, making it difficult for users to understand the maximum transfer speeds associated with each version [3][4]. Group 2: Naming Confusion - Different names can refer to the same technology, such as USB 3.0 being rebranded as USB 3.1 Gen 1, which adds to the confusion surrounding USB standards [3]. - Manufacturers have the discretion to choose naming conventions for their products, leading to inconsistencies in how specifications are presented across different brands [4]. Group 3: Market Naming Rules - The USB Implementers Forum (USB-IF) introduced market naming rules in October 2022, suggesting that names should reflect the maximum speed, such as "USB 5Gbps" for USB 3.2 Gen 1 [6]. - Despite the introduction of market names, there remains ambiguity in distinguishing between USB 4 and USB 3.x based solely on these names [7]. Group 4: Connector Standardization - USB connectors have evolved from standard A and B types to USB Type-C, which is now the standard. However, the physical shape of connectors does not indicate the speed of the USB standard [15]. - USB Type-C has become the de facto standard, supporting fast charging and display connections, but it also introduces complexity in determining data and charging directions [16]. Group 5: Ongoing Issues - The upcoming USB4 version 2.0, expected to reach speeds of 80 Gbps, will further complicate the naming conventions as it will be differentiated from previous versions [14]. - The continued use of "Gen" identifiers without specifying transfer speeds contradicts the USB-IF's goal of reducing consumer confusion [12].

如果您希望可以时常见面，欢迎标星收藏哦~ 来 源：内容 编译自 tomshardware ，谢谢。 USB 开发者论坛 (USB-IF) 于 2000 年 4 月 27 日推出了 USB 2.0 标准，这意味着这一端口速度 如今已是 25 年前的事了。USB 2.0 标准将这一接口推向了主流，尤其是因为它的高速 USB 接口 实现了 480 Mbps 的极快传输速度（在当时可谓是神速）。这比 USB 1.1 12 Mbps 的限制速度快 了 40 多倍，甚至比苹果公司首次实现的专有 FireWire 400 连接器还要快。更重要的是，它的实 现成本比后者更低，因此对主板制造商更具吸引力。 USB 2.0 的早期 尽管该标准于 2000 年发布，但德国出版物Heise（机器翻译）提醒我们，PC 制造商开始在其设备 上 采 用 USB 2.0 接 口 还 花 了 几 年 时 间 。 VIA 是 第 一 家 部 署 该 接 口 的 公 司 ， 其 南 桥 VT8235 于 2002 年与 P4X333 和 KT333 芯片组一起推出；苹果紧随其后，于 2003 年在其 Mac 上推出了配 备 USB 2.0 接口的 ...