Chapter 2.Understanding functions and Operation of Various ICT Devices

ICT

Page 77 and 79

EVALUATION OF CHAPTER 2

A.Multiple Choice

1. a
2. c
3. b
4. b
5. e
6. e
7. c
8. b
9. a
10. c

B.Essay

1. in ASCII code,by what code is letter W represented?
2. Name and explain all supporting devices inside  a CPU.
3. What is the abbreviation and the function of ROM?
4. Name three examples of network interface cards.
5. Name and explain several cables that use on a wired network

ANSWER

1. The letter W is represented by the number code 87.
2. a. Control unit is to translate commands or instruction in a series and then continues them to the entire computer parts.
    b. Arithmetic Logic Unit (ALU) is to process data by adding, substracting, comparing, and using logical formulas.
    c. Memory is to collect or to store data to run an application program.
3. ROM (Read Only  Memory )
    Function ROM is to save computer operation program, such as BIOS and booting.
4. Ethernet, arcnet, and token ring.
5. a.UTP (Unshielded Twisted Pair),it consistsof a pair of plastic wrapped conductor and each is colored.
b.STP cable (Shielded Twinsted Pair),STP cable is similar with UTP cable,except that it has double wrap
c.Coaxial Cable,consist of a main copper conductor with three wraps
d.Optical Fiber,is made of plastic or glass that acts as a medium for signal transmission in the form of light