INTERNET INFRASTRUCTURE

Internet - the largest & most well-known computer network, linking millions of computers all over the world.

Hierarchy Of Networks

1. from a single computer to LAN.
2. from LAN to ISP.
3. from ISP to WWW.

PICTURE 1: Hierarchy of network.

there is a video that you can watch :)
https://www.youtube.com/watch?v=4C1dDaftt0c&t=24s

Internet Service Provider (ISP)

• a business / other organization that provides Internet access to others, typically for free.
• ISPs include most communications & media companies, such as conventional & wireless phone providers, cable providers & satellite provider

PICTURE 2: Example of ISP.

Internet Protocol (IP)

• the language that computer use to communicate over the Internet.

Internet Protocol Address (IP Address)

• a numeric Internet address used to uniquely identify a computer on the Internet.
• commonly used by computers to refer to others computers.
• are numeric such as 207.46.197.32

PICTURE 3: IPv4 address

PICTURE 4: IPv6 address

Domain Name

• a text-based Internet address used to uniquely identify a computer on the network.

PICTURE 5 : Example of domain name

Hyper Text Transfer Protocol (HTTP)

• how messages are formed & transmitted, and what actions Web servers & browsers should take in response to various commands.
• examples, when you enter a URL in your browser, this actually sends an HTTP  command to the Web server directing it to fetch & transmit the requested Web page from a Web server onto a browser in order to view a Web page that is on the Internet.
• HTTP only transfers the contents of a web page into a browser for viewing.

Type of Internet connection

1. Dial-up connection - a type of Internet connection in which the computer or other device must dial-up and connect to a service provider's computer via telephone line before being connected to to the Internet.
2. Direct connection - a type of Internet connection in which the computer or other devices is connected to the Internet continually.
3. Conventional dial-up Internet access - dial-up Internet access via standard telephone lines.
4. Cable Internet access - fast, direct Internet access via cable TV lines.
5. DSL (Digital Subscriber Line) Internet access - fast, direct Internet access via standard telephone lines.
6. Satellite Internet access - fast, direct Internet access via the airwaves and a satellite dish.
7. Fixed wireless Internet access - fast, direct Internet access available in some areas via the airwaves.
8. Broadband over fiber (BoF) Internet access - very fast, direct Internet access via fiber-optic networks, also refered as fiber-to-the-premises (FTTP) Internet access.
9. WiFi hotspots - a location that provides wireless Internet access to the public.

PICTURE 6 : Type of Internet connection.