A computer has a CPU which is called as Central Processing UNit or a Processor builton the mother board. It has many components like control unit and Arithmetic and logical unit.
The Arithmetic and logical unit of the CPU performs the arithmetic operations or mathematical calculations.
Second generation computers were developed during 1956 - 1963.
Protecting data by copying it from the original source to a different destination is called as Backup. When an original data is lossed, to restore the information by copying the data from the source to other destination is called as Backup or Data backup.
On the right corner of the mother board RAM is located in a computer.
Hub works on layer 1 i.e, physical layer.
The memory which can be retained even the power is off is called as Permanent memory or Persistent memory. Computer's hard drive is an example of permanent memory and computer's cache or RAM are examples of temporary memory.
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