CompTIA Unit 8 TEST

(10 POINTS) Explain the difference between MEMORY and STORAGE. Why do we put data in each, and how permanent is each one?

(10 POINTS) Explain why storage units (KB, MB, GB…) are counted in quantities of 1024, but bandwidth units (Kbps, Mbps, Gbps) are counted in quantities of 1000.

(10 POINTS) Explain what 1 Hertz (Hz) is, and what your computer’s CPU does with every Hz and every second.

(10 POINTS) Compare HDD and SSD. Explain why HDD is cheaper even though it holds more data, and why SSD is better

(10 POINTS) Explain the difference between a NAS and a SAN.

The ​ (a)   is a ​large circuit board that physically links all of the computer parts together.

​ ​ (b)   is firmware that checks all of the hardware components to make sure they are functioning properly and ready to run your computer.

The ​​ (c)   controls all parts of the computer and tells them what to do in response to user input.

The ​ (d)   is used to display visuals, images, video, etc... for the user on the screen.

The ​ (e)   allows the computer to connect to the internet.

• motherboard
• BIOS/UEFI
• CPU
• GPU
• NIC

(10 POINTS) What is a bus, and how does it help the motherboard function?

(10 POINTS) What are DIMMs, and how did they contribute to the computer boom of the 90's/2000's?

(10 POINTS) What is a UPS, and why might it be useful?

(10 POINTS) What is OCR and what is it used for?