How does the internet work?

How does the internet work?

Carlos Martín Martín CT2E Iván García Hernández HS2C

index

04. Locating PC

07. The switch

01. The WWW

08. Cables/connector

05. The NIC

02. Internet/ WWW

09. Router

06. HUB

03. The URL

10. Modem

01. the world wide web

THE DEVELOPMENT OF THE WORLD WIDE WEB

HOW DOES WWW WORKS?

• HTML
• Hypertext Markup Language
• HTTP

• Hypertext Transfer Protocol
• URI / URL
• Universal Resource Identifier

In 1989, Tim Berners-Lee proposed the idea of a ‘web of information’. It relied on ‘hyperlinks’ to connect documents together.

More info

02. internet vs the www

The World Wide Web

The Internet

The World Wide Web is a way of accessing information through the medium of the internet.

The internet is the networking infrastructure that connects devices together.

Click here to see more differences

03. internet navigation

3.1 The URL

Definition of URL:

The Uniform Resource Locator or URL is the "address" of a computer connected to the Internet. While surfing the Web, you'll notice that there is an address or location box at the top of your browser.

Parts of the URL

03. internet navigation

3.1 The URL

Parts ot the URL

What do these parts mean?

03.internet navigation

3.1 The URL

Definition

‘Packet switching’ is a method of splitting and sending data.

Packet switching is the basis on which the internet works today.

03. Internet navigation

3.2 Locating computers

IP Address DNS

Two important concepts

• IP Address
• DNS (Domain Name System)

Info

03. Internet navigation

3.2 Locating computers

How to find the IP addresses in Windows 10?

04. computer network components

Function of these components

NIC

Computer network components include the major parts that are needed to install a network. These components are required to install simple computer network, often called LAN (local area network).

HUB

Switches

Cables and connectors

Router

Modem

04. Computer components

types

4.1The NIC

Definition

The Network Interface Card is a device that enables a computer to talk with another computer/network.

• 10Mbps
• 100Mbps
• 1000Mbps
• 1000Mbps

NIC speed

04. Computer components

4.2 HUB

Definition and use:

The Hub is a device that splits a network connection into multiple computers. It is like a distribution centre. Currently Hubs are becoming obsolete and replaced by more advanced communication devices such as Switches and Routers.

info

04. Computer components

4.3The switch

Hub

Concept of switch

Switch

Switch is a telecommunication device grouped as one of computer network components. It uses physical device addresses in each incoming messages so that it can deliver the message to the right destination or port.

04. Computer components

4.4 Cables and connectors

What is a cable? Let´s see its definition

Cable is one way of transmission media which can transmit communication signals. The wired network typology uses special type of cable to connect computers on a network.

Types of cables

Layers of a cable

04. Computer components

4.4 Cables and connectors

Types of cables:

Photonic Chips

04. Computer connectors

4.4 Cables and connectors

Cable layers:

1. Tar coating
2. Mylar tape
3. Thick stranded steel wires
4. Aluminum water barrier
5. Polycarbonate layer
6. Copper tubing
7. Petroleum jelly
8. Optical fibers

Wired router

04. Computer components

4.5 Router

Router uses:

Wireless router

Router is a device that is used to connect a LAN with an internet connection.When you have two distinct networks (LANs) or want to share a single internet connection to multiple computers, we use a Router.

Info

04. Computer components

4.6 Modem

Funcition of a modem:

A modem enables you to connect your computer to the available internet connection over the existing telephone line.

THE END

THANK YOU