To a technical protocols, you need to understand the basics of network, computer and computer networking.
The more you understand how common networks are pooled and functions, the easier it will be to apply
that knowledge to capturing, analyzing and exploiting new protocols.
These course I will introduce basic network concepts you will encounter every day when you, uh, you
are analyzing it through protocols.
I will also lay the groundwork for a way to think about or protocols make it easier to find previously
unknown security usurious during your analysis network architecture and protocols.
And to me, right here, something actually, this is the network.
And we have, for example, uh, Workstation actually tells us.
So this is the work station, for example.
And here.
Um, so let's at uh, one looks at well, left up again here, for example, and.
And workstation here.
And, for example, it's a server again.
This is a server and it's another server.
Here so.
These are the networks, so we will introduce more deeply about them so that this figure shows actually
five nodes connected with a common network, so each node might have a different operating system or
hardware, but as long as each node follows a set of rules or network protocol.
Surely.
Oops!
It's right down here.
OK.
Network protocol, network protocol.
Here.
So, um, but as long as the whole of the set of rules or an extra protocol, it can communicate with
the other nodes on the network, communicate correctly.
All nodes on network must understand the same network protocol.
And it's our protocol serves many functions, including, uh, one or more, for example.
Let's write it down here.
Uh, text.
So that.
So, um, mobs.
So.
Network protocol functions.
Yes.
Network protocol.
Functions.
So what is what network network?
I already told you that network critical serves many functions, including including, for example,
maintaining mean terror and maintaining, uh, maintaining a station, states base stations state.
So now what maintenance assurance that means these protocols typically implement mechanisms to create
new connections and terminate existing connections.
Um, create new connections and terminate.
Actually, can I do like that?
Yes, and terminate it.
Meaning connections here.
So these are the functions of network protocols, and this is also identifying nodes for addressing
what's.
I know it's.
So what Identifying the most for addressing means.
OK, so data must be um.
Troy, this.
Others think so data the main must be addressed threat and transmits it to correct not on a network.
So saying some protocols implement and addressing mechanism to identify specific nodes or group groups,
actually some protocols.
Actually, not some put yes, some protocols implement, implement and addressing mechanism and the
racing mechanism.
Mechanism to identify to widen ify spaces.
Specific UM, nodes or groups of nodes, lots of or nodes, nodes or.
Rural groups of lots.
And here it is.
And if a political serves many function, as you know, one of them is controlling for controlling controlling
flow.
So the amount of data transferred across a network is limited, politicos can implement ways of managing
data flow to increase throttled and reduced latency.
And we have also guaranteeing the order of trance transmitted data.
The order of transmitted data, so many networks do not guarantee that the order in which the data is
sent will match the order in which it's received a protocol can be reorder the data to ensure is delivered
in the correct order.
And we also have detecting.
And correcting or errors?
Errors.
So many networks are not hundred presence, reliable data can be corrupted.
It's important to detect corruption and ideally correct it.
And we have to have lastly formatting, formatting and encoding data.
Data, so the data isn't always in the form of suitable for transmitting on a network.
So a protocol to specify ways of encoding data, such as encoding English text into English text, uh,
into my binary files.
So, um.
We have all seen health protocol suites here.
Let's come here so.
The CPI is the de facto protocol that modern networks use.
He's simply a pea.
So.
These protocols, actually, I'll you you can think of this party IP as a single protocol.
It's actually a combination of two protocols, so that's what this trip means.
And here next.
But here this key IP is, uh, combination is home.