Ports

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description of computer ports such as usb and other ports

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PORTS

INTRODOCTION:

INTRODOCTION PORTS ARE USED TO CONNECT EXTERNAL DEVICES TO THE COMPUTER. THESE ARE THE CONNECTING POINTS OF VARIOUS DEVICES TO THE COMPUTER. THERE EXIST SEVERAL TYPES OF PORTS LIKE SERIAL PORT, PARALLEL PORT , USB PORT, AGP PORT, FireWare etc,..

1. SERIAL PORT:

1. SERIAL PORT The serial port transfers data serially a bit at a time. The serial port needs only one wire to transmit 8 bits. Serial ports come in the form of 9-pin or 25- pin mail connector. Serial ports are often known as communication( COM) ports or RS232C ports. They are typically used to connect devices like mouse and modem .

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Serial Ports

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DISADVANTAGES OF SERIAL PORTS It takes eight times longer to transmit a byte. Also it is necessary to send a start bit before each byte of data, a stop bit after the byte to mark the end of byte and a parity bit to help check the integrity of data.

2. PARALLEL PORTS:

2. PARALLEL PORTS Parallel ports can send or recieve a byte (8bit) at a time. Unlike the serial port, therse 8-bits are transmitted parallel to each other. Parallel ports come in the form of 25- pin female connector. Parallel ports are popularly used to connect printers, scanners, CD-writers, zip-drives, external hard disk drives, tape backups drive, etc..

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Parallel Ports

3. USB PORTS:

3. USB PORTS To spare the user botheration of 8-pin, 25-pin, male, female connectors , the USB(universal serial bus) has been designed. It gives you a single , standadized, easy-to-use way to connect a variety of devices to a computer. These devices include printers, scanners, mice, joystick, digital camera, web cameras, speakers, telephones, zip drives, network connections, scintific data acquisition devices , etc.

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USB Ports

4. AGP PORTS:

4. AGP PORTS The full form of AGP is Accelerated Graphics Port. The AGP port is used to connect to graphic card that provides high-speed video performance typically required in games and other multimedia applications .

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AGP Slot in Motherboard

5. INFRARED PORTS:

5. INFRARED PORTS An IR(Infra Red) Port is a port, which sends and recieves Infrared signals from other devices. In this special form of radio transmission, a focussed ray of light in the infrared frequency spectrum, measured in tetrahertz(tHz), or trillions of Hertzs(cycles per second), is modulated with information and sent from a transmitter to a receiver over a relatively short distance. Infrared radiation(IR) is the same technology used to control a TV set with a remote control.

ROLE OF IR PORT:

ROLE OF IR PORT Infrared data communication is playing an importatnt role in wireless data communication due to the popularity of laptop computers, personnal digital assistants(PDAs), digital cameras, mobile telephones, pagers, other devices.

Functioning of IR Port:

Functioning of IR Port Infrared communication involves a transceiver (a combination of transmitter and receiver) in both devices that communicate.Special microchips provide this capability. IR can be also be used for somewhat longer inter-connection and is a possibility for inter-connections within local area networks with maximum effective distance of somewhat 1.5 miles and the maximum projected bandwidth is 16 megabits/sec. IR is a line-of-sight light transmission, it is sensitive to fog and other atmospheric conditions.

6. BLUETOOTH:

6. BLUETOOTH Bluetooth is a telecommunication industry specification that describes how mobile phones, computers, and PDAs can be intercommunicated using a short range wireless communication. One can buy three-in-one phone that can double as much portable phones at home or in the office, get quickly synchronized information in a desktop or notebook computer i.e., have all mobile and fixed computer devices coordinated.

Characteristics of Bluetooth:

Characteristics of Bluetooth This technology got its name on honor of Harald Bluetooth, king of Denmark in mid tenth century. Bluetooth requires a low-cost transceiver chip be included in each devices. The transceiver transmits and in a previously unused frequency band of 2.45GHz that is available globally. Up to three voice channels are available. Each device has a unique 48-bit address from the IEEE 802 standard. Connection can be point-to-point or multipoint. The maximum range is up to 10 meters. Speed is around 1 Mb/sec.

7. PS-2 Port:

7. PS-2 Port The PS/2 standard, introduced by IBM in 1987, stands for personal system/2. It is an electronic receptacle found in computers. It accepts a PS/2 cable with a mini-DIN connector, and is most often used to plug in keyboards or mouse. The PS/2 port is female while the mini-DIN cable is male. The connector is small with a diameter of about 1/3inch. It features a metal sleeve that is notched to ensure proper alignment when inserting it into the PS/2 port. This protects the circular pins inside the DIN connector from becoming bent.

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DIN stands for Deutsches Insitut fur Normung eV, the standard setting organization for Germany. A din connector is connector that conforms to one of the many standards defined by DIN. DIN connectors are used widely in personal computers. For example, the keyboard connector for PCs is a DIN connector. DIN

8. FIREWIRE:

8. FIREWIRE FireWire is a Apple Computer’s version of standard, IEEE1394, High Performance Serial Bus, for connecting devices to your personal computers. Firewire provide a single plug-and-socket connection on which upto 63 devices can be attached with data transfer speed upto 400 Mbps. Firewire is popular into the audio and video devices like digital camcorders.

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POWER POINT PRESENTATION BY AMAN SINGH AND SUBHANKAR BRAHMA CLASS – XI ‘C’ (2 nd shift) ROLL - 2 & 14

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