Serial And Parallel Ports In Computer Pdf

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serial and parallel ports in computer pdf

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16 Types of Computer Ports and Their Functions

As the name suggests, serial and parallel are the two types of ports. Serial port and parallel port are mainly differentiated by their implementations where the former is employed when we want to do serial communication. As against, the parallel ports are used when we want to achieve parallel communication. Now, what the serial and parallel communication indicates here. In serial communication, the chunks of the data are sent one after the other. In contrast, in parallel communication, all these chunks can be transmitted simultaneously.

Prerequisite — Introduction of Ports in Computers 1. Serial Port: A serial port is an interface that is used for connecting the serial lines to attain the serial communication. These ports can dock a 9-pin D-shaped connector that connects to the transmission line, is called DB-9 connectors. Serial communication gained by single wire and only the single stream of data is transferred from one end to other. Therefore, like parallel transmission, in serial transmission data speed mismatch is not a problem. The length of the wire can be increased as needed.

In computing , a parallel port is a type of interface found on computers personal and otherwise for connecting peripherals. The name refers to the way the data is sent; parallel ports send multiple bits of data at once parallel communication , as opposed to serial communication , in which bits are sent one at a time. To do this, parallel ports require multiple data lines in their cables and port connectors and tend to be larger than contemporary serial ports , which only require one data line. There are many types of parallel ports, but the term has become most closely associated with the printer port or Centronics port found on most personal computers from the s through the s. Today, the parallel port interface is virtually non-existent because of the rise of Universal Serial Bus USB devices, along with network printing using Ethernet and Wi-Fi connected printers.

Parallel port

A port is a connection or a jack provided on a computer to connect external or peripheral devices to the computer, for example, you will need a port on your device to connect a keyboard, mouse, pen-drives, etc. So, it acts as an interface or a point of attachment between computer and external devices. It is also called a communication port, as it is the point where you plug in a peripheral device to allow data transfer or communication between the device and computer. Generally, they are four to six in number and present on the back or sides of the computer. Based on the type of protocol used for communication, computer ports can be of two types: Serial Ports and Parallel Ports. This type of ports provides an interface to connect to peripheral devices using a serial protocol. In this port, the rate of transmission of data is one bit at a time through a single communication line.

A port in a computer network is a communication endpoint whereas, in an operating system , it is a logical construct, recognizes precise method otherwise a network service type. These endpoints recognize the combination of every protocol and its address through bit unsigned numbers, called the port number. There are some specific ports used for identifying particular services to transmit an arriving packet to a working application. The computer port transmits the data from any peripheral to the computer. There are different types of ports available in a computer network.

A Computerr Port is an interface or a point of connection between the computer and its peripheral devices. Some of the common peripherals are mouse, keyboard, monitor or display unit, printer, speaker, flash drive etc. The main function of a computer port is to act as a point of attachment, where the cable from the peripheral can be plugged in and allows data to flow from and to the device. A computer port is also called as a Communication Port as it is responsible for communication between the computer and its peripheral device. Generally, the female end of the connector is referred to as a port and it usually sits on the motherboard. In Computers, communication ports can be divided into two types based on the type or protocol used for communication. They are Serial Ports and Parallel Ports.


The 9-pin is found on most newer computers. Data travels over a serial port at kilobits per second. Parallel Port - connector for scanners and printers.


16 Types of Computer Ports and Their Functions

Before , desktop printers for business had one of two interfaces: serial and parallel. The type of interface dictated the type of cable you used to connect the printer to the PC and how fast the cable carried data to the printer. A parallel interface was faster, using a thicker, more complex cable.

What is a Computer Port : Types and Their Characteristics

Ты раньше говорил что-то про вирус. - Черт возьми, Мидж! - взорвался Джабба.  - Я сказал, что вируса в шифровалке. Тебе надо лечиться от паранойи. В трубке повисло молчание.

 Спокойствие, - потребовал Фонтейн.  - На какие же параметры нацелен этот червь. На военную информацию. Тайные операции. Джабба покачал головой и бросил взгляд на Сьюзан, которая по-прежнему была где-то далеко, потом посмотрел в глаза директору. - Сэр, как вы знаете, всякий, кто хочет проникнуть в банк данных извне, должен пройти несколько уровней защиты. Фонтейн кивнул.

Расплавленные остатки миллионов кремниевых чипов извергались из ТРАНСТЕКСТА подобно вулканической лаве, густой едкий дым поднимался кверху. Она узнала этот запах, запах плавящегося кремния, запах смертельного яда. Отступив в кабинет Стратмора, Сьюзан почувствовала, что начинает терять сознание. В горле нестерпимо горело. Все вокруг светилось ярко-красными огнями. Шифровалка умирала. То же самое будет и со мной, - подумала .

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Все трое замерли. Над ними, опираясь на перила площадки перед своим кабинетом, стоял Стратмор. Какое-то время в здании слышался только неровный гул расположенных далеко внизу генераторов. Сьюзан отчаянно пыталась встретиться взглядом со Стратмором. Коммандер.

What is a Computer Port : Types and Their Characteristics

Хейл начал выворачивать шею Сьюзан. - Я-я…я убью .

4 Comments

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  3. Steve P. 18.05.2021 at 13:25

    Serial Ports provide an interface to connect serial lines to prepare a serial communication.

  4. Marelini 19.05.2021 at 16:04

    PDF | express USB ¶llel port | Find, read and cite all the research you need The universal serial bus (USB) has solved a problem with the personal These signals allow data to be sent and received from the host computer.