back in the good old days when you were watching Techquickie with nothing but a
television antenna I mean not really that never happened but you know what I
mean your TV was able to pick up a signal that just kind of emanated from a
station somewhere that broadcasted the signal in a big kind of like bubble that
anyone in range with a TV and bunny ears could watch but of course videos on
YouTube and other sites don't work this way instead internet traffic actually
has to be routed to the correct Place directly and unlike an old school TV or
radio signal online data has to know
where it's going so how then does it do
this well this is where something called tcpip comes in which stands for
transmission control protocol and Internet Protocol now you may have seen
some vague references to tcpip in your
network card or browser settings but what exactly is is that you can actually
think of tcpip as a cake or a club
sandwich since the way it works is often conceptualized in layers it's just that
those layers are made up of computer code instead of icing or delicious
corned beef the topmost layer is called
the application layer which is what programs like your web browser directly
interact with this layer has protocols like HTTP if you're visiting websites or
SMTP if you're checking your email the next layer down is called the
transport layer where TCP lives along with another schema called UDP which is
a bit faster and useful for low latency applications like online games after the
application layer gets the data from whatever program you're using it talks
to the transport layer through something called a port now each Port can be
assigned to a different protocol in the application layer so that TCP knows
where the data is coming from for example most activity in your web
browser will go through Port 80 which is what HTTP always uses once TCP gets the
data it chops it up into small chunks called packets so that they can be
disposed of in a nearby lake so no one will ever find no sorry what were we
talking about uh where they can be where they can individually take the quickest
route over the internet to get wherever it is they're going to make sure that
the receiving computer can put the packets back together properly dental
records are included so sorry to put it
back together properly into driving directions a Techquickie episode or an
advice animal meme TCP slaps a header
onto each packet that contains instructions on what order to reassemble
the packets into as well as error checking information so that the
receiving computer knows whether the packets data arrived without any
mishaps after this is done the packets are pushed onto the creatively named
internet layer which uses the Internet Protocol or IP to attach both the origin
and destination IP addresses so the
packet knows where it came from and where it's going the data is then sent
through the final Network layer that handles things like mac addressing so
the packets go to the right physical machine as well as converting the data
into electrical impulses that will actually pass through the ver verbial
series of tubes and although every single packet of data has to go through
all of these layers packet switching actually makes the internet faster than
it would otherwise be since it allows each packet to individually avoid
congestion and bottlenecks that would occur if all the data had to travel
along the same route during each session tcpip also streamlines things further
because it can deal with packets from all your computer's applications so that
browser or game doesn't have to do that
by itself so all this stuff going on behind the scenes means that you're
usually not kept waiting for too long at least not anymore since tcpip didn't
exactly save us from blocky videos back when we were all using phone modems that
sounded like a couple of droids trying to have a conversation wouldn't that be funny like
a sci-fi movie set 30 years from the future where instead of the droids being
like they actually sound like modems that's what modems are doing I know
that's what they're doing that's damn it Taran speaking of what
modems are doing they are telling the sites that you visit where you're
visiting them from and TunnelBear VPN
lets you hide that data so it allows you
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effectively making it so the websites and servic
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the best part is you can try out tunnel bear for free with no credit card
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over to our link tunnel bear.com Linus speaking of teren complaining guys
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