How it works? Internet TCI/IP in work, networking, data transfer


for the first time in history people and
machinery are working together realizing a dream a uniting force that knows no
geographical boundaries without regard to race creed or color a new era for
communication truly brings people together this is the dawn of the net 10
how it works click here to begin your journey into
the net know exactly what happened when you click on that link you started a
flow of information this information travels down into your own personal mail
room where mr IPP packages it labels it and send it on its way each packet is
limited in its size the mailroom must decide how to divide the information and
how to package it now the package needs a label contain important information
such as cinders address receivers address at the type of packet ideas because this particular packet is going
out onto the internet it also gets an address for the proxy server which has a
special function as we’ll see later the packet is now launched onto your local
area network or land this network is used to connect all the local computers
routers printers etc for information exchange within the physical walls of
the building the lands a pretty uncontrolled place and unfortunately
accidents can happen the highway of the land is packed with
all types of information these are IP packets novell packets
appletalk packets they’re going against traffic as usual the local router reads
the address and if necessary lives the packet on to another network ah the router a symbol of control in a
seemingly disorganized world will serve our policy on this mysterious underwater
visible little jumpy there he is systematic and caring methodical
conservative and sometimes not quite up to speed sorry but at least he is exact for the
most part as the packets leave the router they
make their way into the corporate internet and head for the router switch
a bit more efficient than the router the router switch plays fast and loose with
IP packets definitely routing them along the way a digital pinball wizard if you
will what you got ramadan day in that in
there in there in left over the right away alright you gotta hear it go eat it’s going anyway you watch together
where are you as packets arrive at their destination they’re picked up by the network
interface ready to be sent to the next level in this case the proxy the proxy
is used by many companies as sort of a middleman in order to lessen the load on
the internet connection and for security reasons as well as you can see the
packets are all of various sizes depending upon their content the proxy opens the packet and looks for
the web address or URL depending upon whether the address is acceptable the
packet is sent on to the internet there are however some addresses which
do not meet with the approval of the proxy that is to say corporate or
management guidelines these are samara Lee dealt with we’ll
have none of that for those who make it it’s on the road
again next up the firewall the corporate firewall serves two
purposes it prevents some rather nasty things from the internet from coming
into the intranet and it can also prevent sensitive corporate information
from being sent out onto the internet once through the firewall around her
picks up the packet and places it on to a much narrower road for bandwidth as we
say obviously the road is not broad enough to take them all now you might
wonder what happens to all those packets which don’t make it along the way well when mr. IP doesn’t receive an
acknowledgement that a packet has been received in due time he simply sends a
replacement packet we are now ready to enter the world of the internet a spider
web of interconnected networks which span our entire globe here routers and switches establish links
between networks now the net is an entirely different environment than
you’ll find within the protected walls of your land out here it’s the Wild West
plenty of space plenty of opportunities plenty of things to explore and places
to go thanks to very little control and
regulation new ideas find fertile soil to push the envelope of their
possibilities but because of this freedom certain dangers also lurk you’ll
never know when you meet the dreaded pain of death special version of a
normal request being with some idiot thought up to mess up unsuspecting hosts the pass our packets take maybe by
satellite telephone lines wireless or even transoceanic cable they don’t
always take the fastest or shortest routes possible but they will get there
eventually maybe that’s why it’s sometimes called the worldwide wait but
when everything is working smoothly you can circumvent the globe five times over
at the drop of a hat literally and all for the cost of a local call or less
near the end of our destination will find another firewall depending upon
your perspective as a data packet the firewall could be a bastiaan of security
or a dreaded emissary it all depends on which side your own and what your
intentions are the firewall is designed to let in only those packets that meets criteria
this fire was operating on port 80 and 25 all attempts to enter through other
ports are closed for business 425 is used for mail packets while port
80 is the entrance for packets from the internet to the web server inside the
firewall package screen more thoroughly some packets make it easily through
customs while others look just a bit dubious the firewall officer is not
easily fooled such as when this ping of death packet
tries to disguise itself as a normal ping packet okay it’s okay no problem nice day we are here for those packets
lucky enough to make it this far the journey is almost over it’s just a
lineup on the interface to be taken up into the web server nowadays a web
server can run on many things from a mainframe to a webcam to the computer on
your desk why not your refrigerator with a proper
setup you can find out if you have the makings for chicken cacciatore or if you
have to go shopping remember this is the dawn of the net
almost anything is possible one by one the packets are received
opened and unpacked the information they contain that is your request for
information is sent on to the web server application the packet itself is
recycled ready to be used again and filled with
your requested information addressed and sent out on its way back
to you back past the firewall routers and on through to the internet back
through your corporate firewall and onto your interface ready to supply your web
browser with the information you requested that is this film away pleased with their efforts and trusting
in a better world our trusty data packets right off blissfully into the
sunset of another day knowing fully they have served their masters well nice and
that a happy ending

35 thoughts on “How it works? Internet TCI/IP in work, networking, data transfer

  1. I had to take the couple of seconds to login and applaud you for this wonderful video. It was very helpful, and I plan on asking my professor to show it to the rest of the class!! Thank you!!

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