Time
41 minutes
Difficulty
Intermediate
CEU/CPE
1

Video Transcription

00:00
Hello. My name is Dustin and welcome to networking Net Plus basics.
00:05
The network plus exam is an entry level in that working certification from Camp Tia.
00:10
This section will come are some of the basic knowledge required for the network plus exam
00:16
networking concepts. The network plus exam covers many basic topics of networking, and we're going to discuss a few of them in this section.
00:25
First, we'll go over what the OS I or Open systems interconnection model is and how it compares to the more modern T c P I. P model.
00:35
After that, we're going to go over I p class ranges and how you can distinguish a private i p address from a public i p address.
00:42
Once we've gone over the basic addressing oven I p network, we're going to go over subheading and cider. Notation
00:49
will then discuss network communication and the difference between a unit cast message, broadcast message and multi cast message.
00:56
Lastly, we're going to discuss several common ports and protocols and what they dio Let's get right into it.
01:04
So first we're going to go over the OS I model
01:08
Theo's. A model contains seven layers
01:11
that characterize and stand, arise the communication functions of a network without regard to the actual physical hardware that sets up the network.
01:21
So in short, that means it can give you a basic visual of everything going on in a network, which can help with design and troubleshooting issues.
01:29
An easy way to remember the seven layers in order from the top or layer seven is all people seen to need data processing.
01:40
So from the top, the layers are application
01:42
presentation,
01:45
session,
01:46
transport
01:47
network,
01:49
datalink and physical.
01:52
The visual on the right lists all of the layers, what happens in each layer and what data is referred to at each layer.
02:00
So let's start it later. Seven. The application layer.
02:04
This is what most users will actually see. It's the application being used, like your Web browser
02:10
going down. We've got Layer six,
02:14
which is the presentation layer.
02:15
It's the preparation layer for the data so it prepares the data in an application for Matt for a network for mom. So this is typically where encryption will take place.
02:28
Going down. We've got Layer five, which is the session layer. When any two devices need to communicate, there needs to be a session created. This is where that will happen. It will negotiate how long a system should wait for a response and when to terminate that session.
02:44
Layer four is the transport layer.
02:46
This coordinates the data transfer between the systems.
02:50
The best known example of the transport layer is tthe E Transmission Control Protocol, TCP, which is built on top of the Internet protocol, commonly known as T. C P, I, P
03:02
TCP and UDP. Port numbers work it layer four While I pee a dressing layer. I'm sorry I p addressing works a layer three, which is the network layer
03:13
so again later. Three is the network layer. This is where routers function and where routing takes place.
03:20
As I mentioned before, this is where the I P address comes into play.
03:23
You'll commonly hear I P address, referred to as a layer three address
03:30
layer to is the datalink layer, and this provides theme no to no data transfer, and it can handle air correction from Layer one.
03:38
This is where you'll see the Mac address is commonly referred to as a layer to address
03:44
well here. One is the physical layer,
03:46
which is the actual electrical and physical connections of the network.
03:57
Next, we're going to go over the TCP I P model.
04:00
So the TCP I P model is also an open standard networking model. In the TCP I P model, though there are only four layers instead of seven.
04:11
Layer four is the application layer, which combines the application presentation in session models are I'm sorry, layers from the OS I model into a single layer.
04:23
Layer three is the transport layer, which lines up with the transport layer in the OS I model
04:28
layer to is the Internet layer, which lines up with the network layer in the O S. I model.
04:34
Lastly, layer one is the link layer.
04:38
This combines layers to end one data link and physical from the OS I model
04:44
and on the right, we've got a nice graphic here showing how those layers lineup

Up Next

Networking Fundamentals for Security Practitioners

In this course, you will learn the fundamentals of networking through the lens of a security practitioner. More specifically, we will cover topics like network protocols, architecture, devices, and topology, which are vital for any entry level IT/Security professional.

Instructed By

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Dustin Parry
Network Security Engineer
Instructor