LIS-3353 - The Internet

The Internet

What makes “the Internet” unique?

What makes “the Internet” unique?

We had:

- The written word
- The PRINTED word
- The Telegraph
- Radio
- TV
-Telephone (which is pretty close, actually?)

American Telephone and Telegraph

Interesting history here.

American Telephone and Telegraph

"The Invisible Barbecue"

Good Ol’ AT&T

They had the physical network?

Which worked like the following:

Smart Network (circuit switching)

Smart Network (circuit switching)

A remarkable, complex system...as opposed to…

Well, let’s try it...

Our L'il Internet

RULE 1 - Pass this note to Jonah

RULE 2 - If you can't, then pass it to someone
who is closer to them than you are.

Our L'il Internet

C D B
(1/4)

Our L'il Internet

A E E
(2/4)

Our L'il Internet

F A E
(3/4)

Our L'il Internet

E D F
(4/4)

Okay, so how did THAT work?

Dumb Network (packet switching)
indirect, node based “post-office” connections

Consider how “resilient” this system is
Due to SIMPLICITY.

vs

The bad complexity of a “smart” network

(E.g. Susie → John → Fred → Singh → Joe
and then what if a node is absent or moved, etc.

Dumb Network!-packet switching

Dumb Network!-packet switching

TOP 3 THINGS ABOUT THE INTERNET!

  1. PACKET SWITCHING
(peer to peer node based network)

— aka, a "dumb network"

We definitely KNOW what was sent

"CDBAEEFAEEDF"

Note how we dealt with "errors"
or Fuzz in the line?

Repetition (multiple packets)
and Error checking (4/4) — more on this later

ALSO What was sent?

okay, but what is CDBAEEFAEEDF

A huge number
(technically, this is DEFINITELY a right answer)

But seriously?

Eh, lets see?

What was sent?

Hex: CDBAEEFAEEDF =

226,202,757,033,695

What was sent?

MAC Address?
Perhaps a computer was identifying itself.

CD:BA:EE:FA:EE:DF

What was sent?

Perhaps, a lovely color scheme...

What was sent?

Perhaps, a lovely color scheme...

What was sent?

Music?

What was sent?

Something else?

110011011011101011101110111110101110111011011111

What was sent?

Wait - maybe encrypted?

(badly)

Tricky...

C	A	F	E

D	E	A	D

B	E	E	F

Obviously, a restaurant recommendation. (Or not.)

Cafe Dead Beef

TOP 3

  1. DIGITIZATION
(literally, turning any "data" into a number)

  1. PACKET SWITCHING
(peer to peer node based network)

DIGITZATION

NOTE, as demonstrated:
The nodes need not know or care what the data “is”

(Later, we learn that ,in fact, encryption can prevent them from knowing)

But — we HAD this. Sort of

Farmer's "Internet?"

FARMERS INTERNET

Until they didn't.

AT&T

In 1907, the head of AT&T argued that
the nature of telephone technology meant that it “would operate most
efficiently as a monopoly providing universal service.”

WAAAT. You mean?

Yes. AT&T OPENLY said

"Competition is BAD."

AND IT WORKED.

WAIT SOME MORE:

Why do we believe it when companies say they LIKE COMPETITION?

"Yeah sure, if I have a hot dog stand, I would just LOVE for there to be another one across the street."

THATS CRAZY.

So. AT&T OWNED THE NETWORK.

Who owns your telephone and what does that mean?

Who owns your telephone and what does that mean?

TOP 3

3) PACKET SWITCHING
Use of a “Dumb” Network:

2) DIGITIZATION
(literally, turning any “data” into a number)

1)…. who owns the internet?

ARPANET

ARPANET

THE DEFENSE DEPARTMENT CREATED IT.
PUBLICLY OWNED UTILITY.
(mostly)

ARPANET + Open source

Building random stuff on it.

ARPANET

Why didn't the American Telegraph and Telephone company invent the Internet?

ARPANET

Why didn't the American Telegraph and Telephone company invent the Internet?

(somewhat controversial) thoughts on invention

The public sector (schools, defense, NASA, government) etc. is as inventive and as innovative as private companies...

..eh, probably more.

(the internet, GPS, touchscreens, digital photography, water filters, invisible braces etc.)

Nobody owns the internet

Nobody owns the internet

It’s a “protocol” or
”technical agreement”

Side Question

Who gives you the fastest internet?

Who did up until about a year ago?

Of course: Who were the “ISPs” in the beginning?

Earthlink, America Online
Juno, “Freenet”
Schools. Libraries. Community centers

TOP 3

DIGITIZATION
+
PACKET SWITCHING
+
PUBLICLY CREATED UTILITY
=
Peer to peer node based network

What services/protocols ACTUALLY look like this?

Vs THIS

ish

Once again

Diversity of layers (OSI)

Application (HTTP, telnet, etc)
Presentation (framework MIME)
Session (pipe,SOCKS)
Transport (reliable packet delivery, TCP)
Network (nodes and address, IP)
Data (PPP)
Physical (wires, radio, USB)

UNOFFICIAL ABOVE APPLICATION?

e.g. Wordpress, Facebook? Apple?

dreams love? Instagram?
Twitter? Black Twitter?
Fortnite? selfies Discord? Hopes Slack?
Mastodon? Etc. etc. etc.)

Diversity of transmission media:

- telephone lines (modem/DSL)
- tv cable
- wireless (802.11)
- satellites
- radio
- lasers (pointless, but true)
- fiber

Another point about wireless and freedom.

All the wifi things work at
2.4ghz

Why?

The FCC, again.

The FCC dictates what you can do at what frequencies.

This is why Radio and over the Air TV,
and CB radio and Satelites all don't mush over each other.

They say who is allowed to do what.

...so naturally, when wifi came out, they set some aside just for that, right?

LOL NO WRONG

The EXACT opposite.

Microwaves

Microwaves heat your food by BLASTING 2.4ghz waves
at the water in it so that they rub against each other.

The FCC saw that Microwaves were going to be the hotness (stop)....

Microwaves

And *deliberately* chose NOT to regulate that frequency.

i.e... Because of likely microwave oven interference
we're not going to set this aside;
ANYONE can do whatever they want on it, good luck

Microwaves

And they did, and it works fine.

Your microwave is a faraday cage
and data doesn't require that much energy.

So yes, wireless home data in the air and
your heat in the pizza is the same thing.

Mobile Broadband / Wireless Cellular Internet

Different. Basically, internet over the cellular network instead of with wires.

Likely to be about 30% of market share whoa

Complex combo, but mostly "old-school FCC regulated complexity" at the bottom

With BS marketing. Like 5g

Diversity of protocols

- telnet
- gopher
- usenet
- email
- irc
- html/www

The Usual Path

- Your computer
- Your router
- ISP “station”
- Bigger ISP Station/Backbone
…. etc.

But what else CAN do internet

- Laptops
- Tablets
- Phones
- Routers
- Cars
- Ovens?

Lampposts

All running you know what

wardrive, and find out yourself – :)

Mesh Networking

Look Familiar?

No Cell or wifi...

jrm4