The A-type connector is for upstream connection going towards the host, while the Type B connector is used for a downstream connection towards the USB device.Īnother type of USB device is a USB flash or Pen drive. Type A connector hosts a type A receptacle, and Type B connector on the other end connects to Type B receptacle.
A widely used type is a USB cable, where one end of the cable is connected to the PC, and the other end is plugged into the device. There are multiple types of USBs we use every day without knowing what they are. To understand how a USB works, we need to understand the different types of USBs available first. The green wire is the positive data wire, while the blue wire is the negative data wire. In this case, the white wire is a ground wire, and the orange wire is the power wire, carrying 5V of DC power. If your USB does not follow the above-mentioned wire combination, it might have an orange, blue, white, and green combination.
Lastly, the black wire is the ground wire, just like that in any other electrical device (Gnd). The red wire is a positive power wire with 5V of DC power that provides power to the USB device. Both of these wires are involved in data transfer. The >white wire is the positive Data wire. This is the most common type of combination. There are four wires inside a cable: red, white, black, and green. Now that you have understood the function of a USB device, let’s understand what is inside the USB cable. The data is transferred via D+ and D- connectors, and the Vbus and Gnd connectors provide power to the USB device. There are two power conductors and two twisted signal conductors. The USB has four different pathways to transfer data. One of the significant advantages of using a USB is that there is no need to restart your PC after inserting the device. USB stands for Universal Serial Bus that links the PC to its peripheral devices. Devices like mouse, keyboard, printer all require a USB cable to operate. USB Block works perfectly on all 32-bit and 64-bit versions of Windows 7, Windows Vista, Windows 2008 Server, Windows XP and Window 2003 Server.Today, almost all the devices connected to the PC are USB-driven. Furthermore, the Program Files folder of USB Block and all the files contained in it are delete proof i.e., no one can delete and uninstall the program without your permission (password).įurthermore, you can also activate Stealth Mode to prevent from being discovered. The program blocks devices even in Safe Mode, making it impossible for hackers to copy data from your computer. USB Block is unique because it blocks all drives, devices, ports and slots from which data can be leaked. This way, you can allow access and transfer data to your own drives while continue to block others.
The program also maintains a list of authorized devices for you so that you won't be prompted for the password next time. If you enter the correct password, the program allows full access to that drive, however if you deny access, no file can be copied or leaked from your PC to that drive. USB Block prompts for a password every time an external device is plugged into your PC. If you use your computer at home or have several PCs in your office, installing USB Block on every computer is your ticket to safe computing. The program also blocks unauthorized network computers & non-system drives, keeping malicious activity as far away from your computers as possible. USB Block also prevents spread of viruses and malware by not letting malicious USB Drives, CDs and DVDs access your PC without your permission (password). This prevents illegal copy, leakage and duplication of your private files and folders. It is a permission based software, once installed, the program asks you to set and confirm a password which it uses to allow access to your own USB drives, External drives, CDs, DVDs etc., while blocking every other drive. USB Block helps you prevent copy of your data to USB drives and CDs/DVDs that do not belong to you.
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