chapter 2 Understanding Functions ang operations of Various ICT Devices

A. Multi Choice

1. A
2. C
3. B
4. B
5. E
6. E
7. C
8. B
9. A
10. C

B.Esai

1. In ASCII code,by what code is letter W reprented?

     2.Name and explain all supproting devices inside a CPU.
     3.What is the abbrevianation and the function of ROM?
     4.Name three example of network interface card.
     5.Name saveral cable that use on awired net.

                JAWAB 

1.In ASCII code, by what code is letter W represented?

   -Code 87

2.Name and explain all supporting devices insde a CPU.

   -Control  unit is to translate commands or instruction in a series and then continues them to the entire computer parts.

   -Arithmetic Logic Unit (ALU)is to process data by adding, substracting, comparing and using logical formulas.

   -Memory is to collect or store data to run an application program.

3.What is the abbreviation and the function of ROM?

  -ROM is Read Only Memory.

  -ROM is to save computer operation program.

4.Name three examples of network interface cards.

  -Such as: ethernet, arcnet and token ring.

5.Name several cables that use on a wired network.

  -UTP cable:It consists of a pair of plastic wrapped conductor and each is colored.The frequency ranges from 100 Hz to 5 MHz.
  -STP cable:STP cable is similiar with UTP cable,excpet that it has double wrap.The middle wrap is a metal sgield or metal foil to avoid electromagnetic interference.Other than that,STP cable connector and UTP cable connector are like
  -Coaxial cable:Coaxial cable consists of a main copper conduktor with three wraps.the first and third are palstic wraps.The fist and third conductor are isolator,while the second wrap in the middle is a conductor.
  -Optical fiber:Optical fiber is made of palstic or galss that act as a medium for sagnal transmission inthe from og light.Connector for the optical fiber is an FO connectorOptical fiber enable data transmision speed of 10 Mbps-2Gbps.