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?)

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 ========>

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 complexity and brittleness of a “smart” network

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

Dumb Network!

Dumb Network (packet switching)

TOP 3 THINGS ABOUT THE INTERNET!

PACKET SWITCHING
(peer to peer node based network)

— aka, a "dumb network"

What was sent?

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

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

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

PACKET SWITCHING
(peer to peer node based network)

TOP 3

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

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

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

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?

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

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

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...