Which of the following makes it possible to use an IP phone without needing an AC adapter?

A customer's laptop display has suddenly become very dim. The image of the display can only be seen with a bright, external light, as adjusting the brightness/contracts controls does not cause much change.
Which of the following components MOST likely needs to be replaced?

A technician is installing a pair of 7.2K rpm hard drives into a NAS unit. Which of the following will provide the HIGHEST levels of performance for the setup?

An organization recently implemented a VDI and would like to purchase inexpensive all-in-one devices that access the VDI. Which of the following would a technician MOST likely recommend to the organization?

Which of the following connector types in MOST appropriate to use to connect a SOHO cable modem to the ISP?