20163_CTS1104_Module2Notes.pdf

20163_CTS1104_Module2Notes.pdf - Explanation To communicate...

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Explanation: To communicate with the operating system running on the computer, each device also requires a software element called a device driver. The device driver provides the operating system with information about a specific device. Explanation: The information and configurable settings found on the Device Settings tab are based on hardware-specific information provided by the device driver. Explanation: It is not uncommon for new drivers to cause more problems than they solve, and many users find that they would prefer to go back to the old version. Windows 8.1 makes this possible with the Roll Back feature, which you initiate by clicking the Roll Back Driver button on the Driver tab of the device’s Properties sheet. This procedure uninstalls the current driver and reinstalls the previous version, returning the device to the state before you performed the most recent driver update. Explanation: Deleting a device and then restarting the computer will allow Windows 8.1 to detect and install the device again automatically. Explanation: The process the publisher uses to create the digital signature starts by running the device driver files through a hash algorithm and then using the publisher’s private key to transform the hash result cryptographically. The resulting value is the digital signature of the device driver. Explanation: A digital signature value is a protected checksum. A protected checksum is the value of an algorithmic function that is dependent on the contents of the data object and that is stored together with the data object. Explanation: One of the primary functions of the Windows 8.1 installation program is to identify the hardware devices in the computer and install the appropriate device drivers for them. For most devices, this process occurs invisibly. There are occasions, however, when the installation program fails to identify a device. When this occurs, one of three things happens: The Windows installation program installs a generic driver instead. The Windows installation program leaves the device without a driver and completes the installation. The Windows installation program permits you to supply an alternate driver.
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