Processor

Posted: August 16, 2011 in administrator networking

PROCESSOR

            It is the central processing unit of the computer. It does all the operations of the computer. This is considered like a brain of the computer. All the data’s are available in the form of binary code that is inside the processor.

       ARCHITECTURE OF PROCESSOR

*  CISC [complex instruction set computer]

*  RISC [reduced instruction set computer]

  1. CISC

Every olden processor has this type of architecture. In this the pins are available in the processor and the holes are available in the processor socket. It contains 728 pins

  1. RISC

All the new processor has this kind of architecture. The pins area available on the processor socket and the dots are available on the processor. It contains 478 pins.

FUNCTIONAL UNITS/ PARTS OF THE PROCESSOR

  • ALU
  • CU
  • Floating point unit
  • Core
  • Cache memory
  • Bus interface

ALU

            This is used to perform arithmetical and logical calculations.

CU

            This is used to control all the operations of the computer.

Floating point unit

            This is used to perform only the decimal number calculation of the processor.

CORE

This is the important unit of the processor. It’s used to read the instruction from the input devices and it gives to other units according to the function. It receives the output from the other unit and it executes to the user.

Cache memory

            It’s a small bit of memory which is available in the processor. This is used to increase the speed of the processor.

Bus interface

            This is used to transfer the data

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MOTHERBOARD

Posted: August 16, 2011 in administrator networking

MOTHERBOARD

Motherboard is a large circuit board that is placed in the computer case. It is considered as the spine or the backbone of the computer. Because all the internal components are control by the motherboard. This is also called as system board, logic board, more or less circuit board.

TYPES OF MOTHERBOARD

Motherboards are classified into four types that is based on the structure and form factor.

BASED IN THE STRUCTURE

non-integrated

Integrated

BASED ON THE FORM FACTOR

AT

ATX

 

  • NON-INTEGRATED

            Every older motherboard was non-integrated motherboard. All the components are connected separately by using expansion slots such as PCI slots. If any problem in those components we can easily upgrade that component.

  • INTEGRATED

All the new motherboards are integrated. In this mother board all the components are interfaced in the mother board, such as input output connectors. If any problem in those interfaced components then it’s very difficult to upgrade.

AT(advanced technology)

ATX (advanced technology extended)

smps

Posted: August 11, 2011 in administrator networking

(SMPS) switch mode power supply

Types

AT- Advance technology

ATX- Advance technology extended

INPUT VOLTAGE

110V AC –230V AC

TRANSFORMER

  • Step up=  AC to AC
  • Step down = AC to AC

= AC to DC

OUTPUT VALTAGE

                                  AT

ATX

+5V DC -5V DC (ground)

+12V DC

-12V DC (ground)

 

 

+5v DC -5V DC (ground)

+12v DC

-12v DC (ground)

+3.3V DC

+5V DC (standby)

Power connectors

  • AT system connector.
  • ATX power connector.
  • Floppy power connector.
  • Standard peripheral power connector

AT system connector

ATX  power connector

Floppy drive power connector

Standard peripheral power connector

A Network Administrator is a professional in charge of the maintenance of the computer hardware and software systems that make up a computer network. This includes activities such as the deployment, configuration, maintenance and monitoring of active network equipment. The Network Administrator is typically a mid to senior level of technical/network staff in an organization and is not typically involved with direct user support. The Network Administrator will concentrate on the overall health of the network, server deployment, security, ensuring network connectivity throughout and company’s LAN/WAN infrastructure, and all other technical considerations at the network level of an organizations technical hierarchy. Network Administrators are considered Tier 3 support personnel that only work on break/fix issues that could not be resolved at the Tier1 (helpdesk) or Tier 2 (desktop/network technician) levels.

The actual role of the Network Administrator will vary from company to company, but usually includes tasks such as network address assignment, assignment of routing protocols and routing table configuration as well as configuration of authentication and authorization – directory services. It often includes maintenance of network facilities in individual machines, such as drivers and settings of personal computers as well as printers and such. It sometimes also includes maintenance of certain network servers: file servers, VPN gateways, intrusion detection systems, etc.