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Basic About Computer

Size:
         8 bits = 1 byte
1024 bytes = 1 kb (kilo byte)
    1024 kb = 1 mb (mega byte)
   1024 mb = 1 gb (giga byte)

 RAM:
         RAM (Random Access Memory) is used to store the  data temporarily.

 ROM:
         ROM(Read Only Memory) stores some predefined instruction which executes every time when the machine starts for the first time.

 Speed:
          Speed is a feature through which the data can be processed very quickly. Microprocessor or Chip or CPU ( Central Processing Unit) is device which is responsible to maintain the speed various types of  processors are dual core,core to duo, Pentium 4 & higher version.

 Motherboard:
           It is a circuit board which holds the other devices of the machine.

 NIC:
            Nic stands for(network interface card) helps to make the connectivity with the other machine

 Port:
            It is   a device which holds the input and output devices. There are different types of ports are available. They are :-
                                   1  serial port
                                   2  parallal port
                                   3  usb (universal serial bus ) port (latest )

 SMPS:
            SMPS(Switched Mode Power Supply) is a device which controls the power supply of the machine.

 Software:
             It is the logical part of the machine. It is used to interact between the user and hardware.

 Types of software:
           1  system software
System Software:
           It is the basic software required to run  a machine. Operating system is the example of system software. Examples of operating  system:- DOS,UNIX ,LINUX,WINDOWS.

            2 application software 
Application Software:
            It is used for  a specific application. Example:- notepad,calculator,ms word ,ms excel etc

            3 compiler software
Compiler Software:
            It is used to develop the ready made software. Example:- c compiler,c++ compiler ,java compiler ,c# compiler,vb compiler etc

 Networking:
           Networking helps to connect more than one machines with each other. Types of network:-
1  LAN(LOCAL AREA NETWORK)
2  WAN(WIDE AREA NETWORK)
3   MAN(METROPOLITAN AREA NETWORK)

 REQUIREMENTS FOR NETWORKING:
            1  Media
            2  Networking Device

 PROTOCOL:
            Protocol is a set of rules to send and receive data. Example:- TCP/IP
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Location: Guddu Apartment, 305/1, Bhattacharya Para Road, Bhattacharjee Para, Paschim Barisha, Kolkata, West Bengal 700063, India

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