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Study Guide: CompTIA A+ Core Certification: USB Standards Overview
Source: https://www.fatskills.com/comptia-a-exam/chapter/comptia-a-core-certification-usb-standards-overview

CompTIA A+ Core Certification: USB Standards Overview

By Fatskills Exam Guides Team — the exam nerds behind 28,500+ quizzes and 2.1M practice questions across 500+ global exams.

⏱️ ~1 min read
USB Version Marketing Name Speeds Supported Maximum Cable Length* Notes
1.1 (legacy) USB 12Mbps 1.5Mbps 3m  
2.0 Hi-Speed USB 480Mbps 5m Also supports USB 1.1 devices and speeds
3.2 Gen 1 (also known as USB 3.0 and USB 3.1 Gen 1) SuperSpeed USB 5Gbps † 15m Also supports USB 1.1 and 2.0 devices and speeds
3.2 Gen 2 (also known as USB 3.1 Gen 2) SuperSpeed+ USB 10Gbps † Also supports USB 1.1, 2.0, 3.0/3.1 Gen 1 devices and speeds
USB 3.2 Gen 1x2 Superspeed + 10Gbps † Uses two lanes of data
3.2 Gen 2x2 Superspeed+ USB 20Gbps † Uses two lanes of data USB-C only
USB4 Gen 2x2 USB4 20Gbps 20Gbps 2m  
USB4 Gen3x2 USB4 40Gbps 40Gbps 2m  


* To exceed recommended or maximum cable lengths, connect the cable to a USB hub or use an active USB extension cable.
† 3m is the recommended length, but no maximum cable length has been established for these versions of USB.


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