πŸ“‡ Something we need to address...

🎯 Learning Targets

AP I can explain the abstractions in the Internet and how the Internet functions.
AP I can explain characteristics of the Internet and the systems built on it.
I can develop and explain the need for a protocol with origin, destination, and message content.
I can explain the difference between IPv4 and IPv6 with regard to bits and available addresses.

So far, we have communicated messages between two people. Our β€œinternet” looks like this:

But the actual internet looks more like this:

Yikes.

Our β€œsimple” 1:1 protocols will break down. To get a sense of how the inventors of the internet designed a solution, let’s play a game of Battleship.

BattleπŸ›³ Round 1

Example Board

You maintain and mark two grids:

Starting a New Game

BattleπŸ›³ Round 10

Now, how could that information be transmitted using bits?

  1. List all the information that you needed to play Battleship.
  2. Diagram your protocol.

While developing your protocol here are some questions and suggestions to think about:

IP Addresses

A number assigned to any item that is connected to the Internet.

Go to: 216.58.217.174

Packets - Small chunks of information that have been carefully formed from larger chunks of information.

Protocol - A set of rules governing the exchange or transmission of data between devices.

IPv4

πŸ‘‰ How could the internet run out of room?

4,300,000,000 addresses, 5,000,000,000 mobile devices…

IPv6

πŸ‘‰ 340,282,366,920,938,463,463,374,607,431,768,211,456 addresses

Three hundred and forty undecillion, two hundred and eighty-two decillion, three hundred and sixty-six nonillion, nine hundred and twenty octillion, nine hundred and thirty-eight septillion, four hundred and sixty-three sextillion, four hundred and sixty-three quintillion, three hundred and seventy-four quadrillion, six hundred and seven trillion, four hundred and thirty-one billion, seven hundred and sixty-eight million, two hundred and eleven thousand, four hundred and fifty-six.

Every single computer connected to the internet has an IP address.

ipconfig getifaddr en0

  1. Hexadecimal!