I'd like to thank Deep Breath Technologies for sponsoring this video as part of my Kickstarter campaign.

So how to communicate, we've talked a little bit about how the internet was designed, how

things kind of communicate between different devices and

break things up in the different chunks and stuff like that,

so we're going to continue on that discussion a little bit.

Sp, some parts that we need to communicate between two devices.

Let's start out with with two nodes here so we're going to have

device one, and

device two. And that's going to be connected by a cable

and within these devices

are network cards which we'll talk about some more coming up.

They're going to do the communicating for us

so in order to communicate we need to have

a source and a destination.

We need to have an encoder and a decoder so within this computer

let's say it's a computer, we need to take the data from

the applications and put it in some sort of format

through the network card to get it onto this cable in order to do so we need to

encode it so we need to have

over here an encoder

which tells it how to put those bits onto the wire

and over here going to have to have decoder

how do we interpret these bits that come

and permanent record and I receive them

we also have to have a transmitter

and

the receiver so

we need to have some sort of way of getting it on to the wiring in some sort

of way of getting an offer the wire

we also have to have

some sordid medium so we through this already but this will be our

medium it could be copper fiber

Wireless I'm anything like that

different flavors agree to those kinds

generic kind media if that's inserted media to transmit across

so those are the basic parts we need to communicate

source the destination an encoder and decoder

wants teen cody gets transmitted and then received

and that all goes across some thirty media an ordered

for the transmitter to send it onto the medium

we need to segment it in the different pieces

so up here will have some sort of

application that's running was terrible

in such a happy occasion turning and then has to get down

into our network card and get sent across the media

he needs to get that data from this application is to get chopped up

we had a cut-up in the pieces the recall segmenting

and then those segments intern get transmitted to this gets transmitted

and then this gets transmitted and then this gets transmitted

and then as they work their way across the wire

then get received

and then they'll get built again will go into more detail on this

incoming videos but that's the general idea is that thing gets built back

this piece by piece and then we have our data over inside

you can also

changer color you can also have multiple

applications or multiple communications across

that same wire that same media it is called multiplexing

we can have as I mentioned the efficiency have

the packet packet switching networks are

vastly more so than absolute circuit switching networks

this is bird is why is that multiplexing so this could be

you know application number two is blue

I and then it comes up on the other side

or this could be some completely other computer

on that same wire we could have you know someone down here

in he is a source number two

it's that is a network card and making purple

and then he also wants to talk on that same connections

so he turned to talk to the destination as well

we're gonna multi-plex is traffic rate in there as well

and that's gonna get to its destination and then this guy ever hear

he's going to receive that seem application

that's the general idea multiplexing is getting multiple communications on that

same wire

otherwise you not been fishing with its use

now we have some devices here

we've already labeled but we have ball talk about like this junction here we're

going to talk about

we have we have devices on your network now we have this is considered an end

device

missus and and device or a host or something

review any use for your terminology but that's our and devices

they're going to generate and receive that data so we have the

transmitters and decoders receivers encoders that's on

that on this site here were grating sensor dove

data to be sent receiving it over on the other side

in the middle and we'll switchover

critical piece here

gonna put a router just for fun

this is going to be are intermediary device and this is really what we focus

on

in Cisco with CCNA this this is

this is what we're going to worry about we may have other devices in here as

well

but I'm but this is what we consider an intermediary device

group area and you know I'll put another one in here too

so we cover both

both aspects have common intermediary devices

put a switch in here as well so here's a switch

and you might have someone else coming off that as well

sell more talk about switches and routers and how they

on makers to

mission to we'll talk about routers and switches and how they

differ and other similar got coming up

but these are this is also considered an intermediary device

I so I mention we have the media that could be copper

fiber radio waves on

each one has its own method over transmitting an encoding

on how to get across the media even within

fiber or copper more radio waves

there's many different versions in different protocols to use within that

'em things have changed over the years

you know we've gone from 10 megabits per second networks up to

10 gigabit per second networks need step by the way has had a different encoding

method to use a different way of accessing that media

to get that level of quality and speed

and across these networks

on what we're in coding and transmitting and receiving and such

these are we consider services so maybe this

is not say this is a

is a server over here

and he's hosting web sites his

existing HTTP

that the service says they're going to consider a service

kinda makes entering Server service

other could be on a host as well when we run

TFTP on our computers to transmit

bin file the IRS to our routers and switches

we are hosting a TFTP service

on RPC an intern turning it into a server centrally

so there's going to be a service in a shitty P that's that's at the screen

guys could be for example cell

these little segments could be little he's TTP packets

transmitting across

I can have a much different ones this could be FTP

the other one could be let's say a

maybe this is VoIP so will say this is the phone and to this could be a

committee VoIP that's how we get everything onto

one network and how we communicate is by using these network cards to

I and the OS I layers were to get into to take

in applications data on

break it up into segments encoded and transmitted across the wire

ill most likely go through some sort in community re device

or multiples love on its way to its destination

it will then be received and decoded and then rebuilt

into some sort of an application or data for some

some use by the other side any of these

protocols are talk a lotta know nothing about a lot of these applications and

protocols are talking about

we consider them services especially when you're talking about the

client-server model

there will be getting into is other services

now that we refer to that are commonly used that's that's so these are HTTP FTP

on VoIP

also to different ones out there SMTP pop

you whatever you want to call them they're all they're all services have

some kind

so going from this

we're going to be expanding into the sizes have networks

now that we know how the basic idea network communication works both how big

can I get a network from

what kind of design can I make this is kinda messy network here we've got some

little router in here we got some random switch with a buncha devices spinoff

doesn't really make much sense will get into you know how

how large can I make it was the proper way of designing it what are the terms

used

for the different sizes networks Landsman spans man's et cetera

others and and we'll get into that

as well as I'm

the something more detailed information about the what the physical side is

a interconnecting the within large networks

I'd like to think

deep breath technologies for sponsoring this video as part of my Kickstarter

campaign