Hello and welcome to another video from section 2 and map
Essentials. This is the second video of the section to I'm
going to talk about introduction to the parts. So
we'll just put exactly Direction several type of words, but
in general, a port is a physical dot point for
connecting external devices to the computer support, active
interfaces between the computer and these external devices,
for example, harder
Computers can connect to the computers with the use of the parts. For
example, if you want to print something or connect to your hard
drive, or maybe when you want types
of in your browser in the Google using ports to
connect to the each divisive, so
these connections are going through the parts.
And now we have OSI reference model. I'm going to
explain exactly what is that. Israel
is an international standard organization that sets
the standard for the wide range of products from these standard
are related to the network equipment. And the OSI model will
also provided by these organization reference
models are used to be better undefined Network on
function and the OSI model is a one of
the reference models. Also that sense for her.
Open System interconnection model features.
As we said it was presented by is 0. And
this reference model have seven layers that
we will pay attention to the next slide. Each
layer is associated with a higher and lower lever. And each
layer has a specific task also for
your general knowledge before, OSI reference model. There.
Was it TCP reference model that usable
anymore. So we just can't talk about our
servers model. Let's see. The ocean friends were and how
is it working?
Before that. Now we're talking about a pores is important to
talk about the protocols for your better. Understanding about
the easel and OSI model, a
set of rules used by computers. So that computers can communicate with
each other. To establish. The Portugal is standard,
argument on which communication are based.
In the image below that we're going to show you. Now, you can see the transfer boundary
of the information from one computer to another, then
you can see the whole side model due to side and
to computer and seven layer on each sides. And
you can see, there's a 7-Layer from each side. I'm going to
start with the layer 7 and coming down for the layer 1.
And talking about how the communication works here from
the start point. We have a sending computer. There's soda
layer, 7 application layer, using the user interface.
And then we have a layer 6 presentation layer
after got to scoot to the layer 5
session, layer transport layer, that
we call TCP TCP IP. We
have a network layer, the IP and TCP, IP
layer 2 data, link
layer, and I see physical address, and
then layer one, physical layer, network
card, and cabling.
Then we have physical networker. And
when it's come to the receiving computer will start from layer
1, the stepdads, the computer, using
the physical layer to get the information from
the sending computer and then transfer to the
higher layers, to finally, get to
the application layer user interface.
Let's go for a summary.
First of all, we're talking about a ports and could prevent a
poor supported structures, then we'll go to the OSI
model and how its Works actually and explain
it about how the layers works and
how their communication with each other.
The next video we're going to talk about in my penis can, and we
going to actually start working with nmap, and
using our first scenario. It will work. Good
luck.