chapter2 understanding function and operation of various information and Communication technology devices

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,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 card !
5.name 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 command or intructions in a series and then continues them to the entire
      computer parts.
   b.Arithmetic Logic Unit (ALU) is to proces data by adding,sustracting,comparing and using logical formulas
   c.Memory is to collect or to store data to run an uplication program.
3.ROM (Read Only Memory) is a permanent memory that can be read but cannot be updated.The function is to save computer operation programe.
4.ethernet,arcnet and token ring
5. There are several type of cables for computer network,namely:
       a.UTP Cable (Unshielded Twisted Pair)
       b.STP Cable ( Shielded Twisted Pair)
       c.Coaxial Cable