Hi and welcome to cyber dot i t. My name's Anthony and I'm your local subject matter expert here for Network Plus, and today we're going to be combining two modules modules, 1.5 and 1.6. And we're going to be talking about common TCP in UDP ports as well as explaining their associated networking protocols.
So when we're trying to network computers together,
it's more there's more going on than just connecting to computers with a cable.
When computers were invented, we didn't really have networking. Networking wasn't a thing. Computers were standalone machines, which performed calculations.
Networking didn't comment Il
Now the first person who invented networking didn't just invent takes him copper cable and plug in one machine to another.
There has to be more to that.
Computers need to know. How am I going to send this data? How am I going to package this data so the other side will understand what this is and be able to receive this data and put it back together in the right order. How will the other side know how to take this data and how to present it in a way that
eyes able to be seen by humans. How will they be able to see this file? How do I authenticate myself? How do I make sure that this connection is going through?
There's a lot that's going on when we're connecting to computers. It's more than just connecting via the wires.
Now, when we're talking about computers
in our modern protocols that we're using
a big topic in a big overview and a big concept, we need to sort of start getting our head around is the TCP I P. Suite.
Now? We talked about the TCP I P model, but this is different. The TCP I P model is away in comparison to the S. I model that we understand all the different layers of networking.
The TCP I P suite is all of the different protocols and ports and TCP or UDP, protocols that we use in order to make up the Internet
in order to make up networking in order for using our T. C P I P suite,
making it so that our computers can talk to another computer around the world.
The T C P I C P suite is all of the different protocols and everything all applied together so that we can make those connections.
the TCP I p sweet TCP slash i p stand for individual topics.
TCP stands for transmission control protocol and we talked a little bit about TCP before. We've talked about TCP in the context of TCP versus UDP, and we'll get to that in a little bit.
But T C P is a protocol for transmitting data, which is verified delivery to in point of a 1 to 1 communication. So when we're sending data over a TCP connection, we're sending a team. We're using a TCP protocol. We're sending a packet of data from one point
to another point in a 1 to 1 correlation.
So I am sending one point or one i p address this packet.
And when it gets there, is going to verify that it received that packet and received it in the right order.
That's what TCP does
now. TCP encompasses several other protocols which will also talk about. And these other protocols include things such as http
sshh, https, different file transfer. So
all of these different protocols, all of these protocols either fall under TCP or UDP. another control protocol, which we'll talk about it a little bit,
but moving on with our TCP slash i p suite.
The other part of T c p i p is the i p. Now I p stands for Internet protocol.
An Internet protocol is the protocol that allows us to address computers with I P addresses, allows us to route data around the world and allows us to map logical i p addresses to a physical address.
If it was just the TCP part, if it was just transmission control protocol, then we may be able to sin packets two computers that are on our same network. We may be able to send packets and deliver different messages to computers that were directly connected to with a wire.
But we would have to be Trans talking between Mac addresses
and Mac addresses as we talked about before, or a layer to protocol. Which means they're on our data link layer, which means they're not around. They're not row doble. We can't route packets around the world or across different networks that are directly for a Mac address. This is because our networks are have different apologies.
Our networks are set up in different ways. We'll talk later about
rains, apologies and bust apologies and messed apologies. But essentially, it's a topology is the way that we have our network set up to communicate the way our network quote unquote looks.
And different networks have different apologies in different ways they communicate. If we just try to communicate with layer to data link layer around the world, then it would be very un standardized. It would be very difficult to
control where our data went and how to get from point A to point B. You almost have to stretch a wire from your computer all the way to a switch that's in a completely different, completely different country. If you're trying to get to that server,
the i p part of T c P I P. The Internet protocol
allows us to map. Those allows us to take that third layer. And actually, route traffic allows us to actually network traffic and moving around the world and take our physical addresses mapped into a logical I P address and then use that I p address to deliver packets around the world.
So we need both the TCP in the i p part of our t c p i p and then I p is a row double protocol so we can take and we can take an I P packet and put it in a router and route it around the world. It can traverse different networks.
that's our T c p i P. Suite.
let's take a look at our T c p i p sweet as compared to roos I model to get a little bit of ah further. Look at this. Now we're going to have to discuss ports and protocols to fully understand this to fully understand our t c p i p sweet, but we're going to start with our big overview.
Just so you guys get an idea of what we're trying to get our get our minds around. What? We're trying to get our arms around
before we start breaking it into the subsections. So we're gonna start from the overview and then break our way down if necessary, I would almost recommend
watching this Siri's watching 1.5 slash 1.6 all the way through, understand, trying to understand everything. And then after you get all the concepts, maybe watching it through one more time or skimming through it one more time, or are swimming through our notes one more time just to say Okay,
now that I'm understanding everything, let me just go through this one more time so I can really recapture it.
That's that's the beauty of learning. That's the beauty of learning computers and learning. Networking is after we learn, we learn the overview. Then we learn how all the parts and pieces fit together. And then after we learn how all the parts and pieces work, when we take another look at our overview, we say, Whoa, okay, now I understand.
Now I'm understanding how all these parts and pieces fit together to form our T c P I P suite.