Time
31 hours 29 minutes
Difficulty
Beginner
CEU/CPE
30

Video Description

OSI Model Layer 5 Session This lesson focuses on layer 5, the session layer of the OSI model, which is the traffic control layer. This is where traffic between computers is controlled and where connections are established, managed and terminated.

Video Transcription

00:04
next we have our layer five now are Layer five is our session layer. And this is gonna be our traffic control layer are layer five is going to control the commune, the connections between our computers and it's going to be the layer that establishes, manages and terminates connections. So when we're thinking about the actual layer that
00:23
says, Okay, you're allowed to talk now,
00:26
or the layer that creates the connection and manages who can send when? Who can send what, what type of protocol on everything we're gonna use. This is gonna be our session five
00:38
again all regular. Our Session five regulates wind computers can send how much they can send and essentially coordinates our conversation. So that's our layer. That's where our layer five performs that now, when we think about our previous layers, we think about our layer one our physical layer,
00:57
our lay it later to you or data link layer on layer three
01:00
network layer layer for transport layer. All of these layers so far have really just sent. Data are sent or received data.
01:08
Our physical layer, our network interface card. There's no physical way to control traffic other than unplugging a cable from our computer and we're not gonna get anything. Um,
01:19
and our data link layer are Mac addresses aren't really going to provide any way of controlling when they can send and receive data.
01:29
Same with our network layer on network layer is just gonna be doing I p addressing. It's really just going to be assigning logical addresses to our physical addresses, and it's going to be a routing that information over various networks.
01:42
And then we have our layer four where we talked about TCP your UDP, and it manages how that information is sent over our network. It manages packaging data into smaller chunks so that the other computer can receive it and it can take the data and reassemble it. Layer forward, as we said, essentially just
02:00
manages that particular data stream
02:04
and manage is making sure that that conversation gets to where it needs to go
02:08
well before we get onto our other layers before we form at the data and layer six or layer seven, decide which applications can talk on our network, we need to have something that's controlling this whole conversation that's going on with our layers. One through four So that's our layer Five are lay of five. Our session layer
02:28
is going to be where we
02:30
create. We establish a connection. We perform our hand, we perform our handshake with the other computer. And then we were done talking. We terminate our connection, and then all of our other layers sort of function with that and they get the pack. They are layers up to this point. Have got the package is ready.
02:47
They're ready to get the package where they need to go.
02:51
But something needs to coordinate that. We on our assembly, not line. We need a We need a man. We need a shipping manager to let us know where these packets go or when to start sending the packet when we've received payment. And we've made sure that this person this address is the correct address that we need to send Thio
03:08
This person we need to have a person. We need to have a layer that manages that.
03:13
And when we're in talking about our computers and when we were using our computer layers in R O s I O s I model, that's going to be the function of our layer five

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