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USB communications device class (or USB CDC) is a composite Universal Serial Bus device class. The communications device class is used for computer networking devices akin to a network card , providing an interface for transmitting Ethernet or ATM frames onto some physical media.
The USB mass storage device class (also known as USB MSC or UMS) is a set of computing communications protocols, specifically a USB Device Class, defined by the USB Implementers Forum that makes a USB device accessible to a host computing device and enables file transfers between the host and the USB device. To a host, the USB device acts as an ...
BadUSB is a computer security attack using USB devices that are programmed with malicious software. [2] For example, USB flash drives can contain a programmable Intel 8051 microcontroller, which can be reprogrammed, turning a USB flash drive into a malicious device. [3] This attack works by programming the fake USB flash drive to emulate a ...
USB ports and connectors are often color-coded to distinguish their different functions and USB versions. These colors are not part of the USB specification and can vary between manufacturers; for example, the USB 3.0 specification mandates appropriate color-coding while it only recommends blue inserts for Standard-A USB 3.0 connectors and plugs.
The WebUSB's API framework standardises disparate protocols and is able to expose non-standard Universal Serial Bus (USB) compatible devices to the web. [8] The WebUSB looks to sit between the perception layer and the network layer. [6] The main goals of software in this gateway are; Scalability, Cost and reliability.
The virtual CD-ROM drive cannot be removed by reformatting because it is presented to the host system as a physical device attached to a USB hub; [3] the official U3 Launchpad Removal Software was available on the U3 website and disabled the virtual CD drive device, leaving only the USB mass storage device active on the U3 USB hub controller ...
lsusb [3] is a similar command for USB buses and devices. To make use of all the features of this program, a system needs to use Linux kernel which supports the /proc/bus/usb interface (e.g., Linux kernel 2.3.15 or newer). Example output on a Linux system:
This Micro connector shrinks the connector size to something resembling a micro-USB connector, [60] [61] [62] measuring only 5.83 mm × 2.20 mm [63]: 36, fig. 4.1.9.8 For comparison, a micro-USB connector is 6.85 mm × 1.8 mm and a USB type-A connector is 11.5 mm × 4.5 mm. It keeps the standard 19 pins of types A and C, but the pin assignment ...