Computer science internet

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They are computer systems.

The system that collects data (input data), processes

it and transmits it (output data).

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Copy the following sentences in the order that you

do them:

a) I save the photo in My Photos.

b) I print the photo.

c) I copy the photo from my digital camera.

Match the previous sentences with the stages

output, input, To process

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It’s a set of knowledge and techniques toautomatically process information and data with adevice. Examples: computer , PDA, Smartphone, GPS,Tablets, eBook, video console, MP5, Smart TV,Smartwatch, Google glass.

Data are encoded in binary code (2 digits).

Bit.- It´s the smallest unit used to represent data or information. 1 and Ø

Multiples of data

Byte.- 8 bits

Kilobyte.-1024 b

Megabyte.-1024 Kb

Gigabyte.-1024 Mb

Terabyte 1024 GB

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Hardware: The physical components of the computer

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Ports

Connector

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Motherboard

Programs that process data.

Operating system: It’s a set of instructions (programs)

that start up a computer and enables hardware to

work. It permits communications between any program

and hardware. F.i. Displaying characters on the

monitor, printing information

It’s impossible that a computer can run without OS so it’s the

first software that you must install.

Windows, LINUX, Mac OS, android

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Programs that process data.

Other programs

Games, APPS, programs to process images, video, sound,

storage of data, multimedia applications: word, excel, tools

for drawing.

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Drives:

Where the

information is

stored

Hard disk,

USB, DVD,

memory card

Folders:

Contain and

organize files

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Files: Data are stored in that way

You can recognize a file by its: Name + extension (3 o 4 characters). Icon.

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Exercise 1

Exercise 2

Exercise 3

Exercise 4

Exercise 5

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It’s an array of computers connected together

that can share data and hardware (printers).

Elements of a network:

Computers (host, server and client) with a network

interface card.

Router, Hub, switches.

Programs to transmit information. Protocol TCP/IP

Transmission means: wires that connect computers or

wireless.

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Interconnected networks (e.g. Internet) It’s two or more networks connected.

Internet (World Wide Web). It’s a network of networkswhere every single network works independently and usesthe same protocol (TCP/IP). 192.145.12.3

Each computer connected to Internet is identified its own IPweb address. Moreover another way of identify a computeris domain name e.g. http://www.jesuitinasvalladolid.com/

Internet access To access the internet you need an internet provider.

Movistar, orange, etc are providers of internet access.

There are several ways to access to internet: ADSL Cable Satellite Internet Smartphone mobile phone

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Web pages

Web pages are hypertext documents (text, links,

images, multimedia). Name + extension (htm, html).

You can edit them with specific software such as

FrontPage, dreamweaver, Joomla, word or directly on

the website.

Web pages are identifies by URL address.

http://www.jesuitinasvalladolid.com

Browsers

If you want to open a web page you must install a

browser.

Internet explorers, Mozilla Firefox, Google chrome,

Opera, Safari are examples of browsers.

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Search engines These are web pages that you can find information with.

Google, Bing, Yahoo are examples.

Portals These are web pages that offer different resources:

News

Links to other web sites Search engines Multimedia information Chats Documents Shopping

Email to send and receive messages. Today is used to identify

people

Social networks. Virtual communities. Facebook Group of people who have a relationship in a virtual space

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Blogs

Web pages that are updated almost every day

Forums

People can exchange opinions and information

Chats (IRC).

Several people that communicate at the same time. Only text

Instant messaging.

Two people. For instance Messenger

Videoconferences. Skype.

Communication with sound and video

VoIP. IP telephony. Phone over internet

P2P (Peer to peer) networks. Emule, torrent

Programs that interchange a big amount of data (video, music)

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Thinking skill 1. Mapping mind

Thinking skill 2. Next slide

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