The OSI and TCP IP Model - - vimore.org

The OSI and TCP IP Model

The OSI and TCP IP Model

YouTube

Welcome to the ITFreeTraining video on the OSI Model. This video will look at the OSI model and in particular, how it relates to the internet protocol. Access the rest of the course http://ITFreeTraining.com/ipv4 Download the PDF handout http://ITFreeTraining.com/handouts/ipv4/osi-tcp-model.pdf OSI Model 0:13 – The OSI was first developed in the 1980s. It is a conceptual model aimed at standardizing network communication. The model was not implemented in its entirety, but it is still referenced today. The OSI model has 7 different layers. Each layer is directly linked to the layer above and below it, if a layer exists. As data travels down the OSI model, each layer adds additional information. This continues until it reaches the last layer. It is then transmitted across the network. Once the other side receives the data, the process is reversed. You can see how each layer requires the layer or layers adjacent to it. Also it is not possible to skip a layer. All communication either starts at the top layer or is received at the bottom layer. At the top, is the application layer. This layer provides the application programming interface. The next layer, presentation, is responsible for data formatting. This includes encoding, encryption and compression. The next layer, session, is responsible for connecting and reconnection of the network if it is lost. This also includes authentication of the connection. The next layer, transport, manages packet size and the resending of data if it was lost or corrupted. The following layer, network, routes data between different nodes in the network. The second to last layer, data link, is responsible for flow and error control. For example, ensuring more data is not sent out then the local network can handle. The last layer, physical, communicates directly with the network and is responsible for transmitting data on the network. As stated, the OSI model is a conceptual model and not directly implemented in modern networking, but is referenced from time to time. OSI Model & TCP/IP 2:20 – To demonstrate this, I will now compare it to the TCP/IP model. TCP stands for Transmission Control Protocol and IP as we know stands for Internet Protocol. A number of protocols are used to make internet communication possible. These protocols were grouped together under the name TCP/IP. Nowadays you don’t hear this name so much, generally you will hear just IPv4 or IPv6 but it is still valid. As you can see, TCP/IP has 4 different layers as opposed to the 7 layers of the OSI model. It is shown as an exact fit, however in reality it does not fit the OSI model exactly. The application layer maps to the first and third layers of the OSI model. Transport is a direct 1 to 1 mapping. The internet layer maps directly to the network layer and the last two layers of the OSI model map to the network access layer. Protocols in TCP/IP 3:25 – Even though there are only 4 layers, each layer can be broken down further. As seen here, at the application layer there are a number of different protocols. You can see how software will generally use protocols to access services on the internet. The protocols themselves will access the transport layer. At this layer, there is a choice of TCP and UDP. TCP stands for Transmission Control Protocol. TCP gives reliable transmissions. If a packet is lost in transmission, the protocol will notice it has not arrived and request a resend. In contrast, UDP, which stands for User Datagram Protocol, is unreliable transmission. If a packet goes missing in transit, it is not resent. Think of UDP like mailing a letter. Once you mail the letter, you have no idea if it will arrive at its destination. The next layer determines if IPv4 or IPv6 is used. At the bottom is the device driver which communicates with the network. The most common type is Ethernet, however any other network devices are supported. You can see how TCP/IP is very modular. This makes it easy to add additional protocols and add additional hardware when they’re developed. I will now have a look at how the OSI model may get referenced today. Our description is too long so please visit http://itfreetraining.com/ipv4/osi-tcp-model for the full description. See http://YouTube.com/ITFreeTraining or http://itfreetraining.com for our always free training videos. This is only one video from the many free courses available on YouTube. References “OSI model” https://en.wikipedia.org/wiki/OSI_model “Internet protocol suite” https://en.wikipedia.org/wiki/Internet_protocol_suite Credits Trainer: Austin Mason http://ITFreeTraining.com Voice Talent: HP Lewis http://hplewis.com Companion Document: Phillip Guld http://philguld.com Video Production: Kevin Luttman http://www.KevinLuttman.com



OSI Model Explained | OSI Animation | Open System Interconnection Model | OSI 7 layers | TechTerms

Learn computer network layers or OSI layers in a computer network, OSI Model, OSI reference model or open system interconnection model or networking model inclu

YouTube

Subnetting

Welcome to the ITFreeTraining video on subnetting. Understanding how to subnet is essential if you want to deploy and maintain IPv4 networks. Access the video

YouTube

Hub, Switch, & Router Explained - What's the difference?

This is an animated video that explains the difference between a hub, switch, and a router. It explains how a router works, how a switch works and how a hub wo

YouTube

The OSI Model - CompTIA Network+ N10-004: 4.1

THE N10-004 EXAM HAS BEEN RETIRED. See the latest Network+ videos at http://www.FreeNetworkPlus.com The OSI seven layer model is an important concept for any n

YouTube

TCP and UDP: Comparing Transport Protocols

TCP and UDP: comparing and contrasting these transport protocols? Which transport protocol is used in which application on a network? What is a 3-way handshake?

YouTube

IP Address Demo Manual and Auto

In this video from ITFreeTraining, I will look at how to setup and control the IPv4 protocol as well as quickly touching upon how to configure the IPv6 protocol

YouTube

DHCP Explained - Dynamic Host Configuration Protocol

What is DHCP? This is an animated video explaining DHCP - Dynamic Host Configuration Protocol. Also explains the difference between a static IP vs dynamic IP.

YouTube

Cisco - CCENT/CCNA R&S (100-105) - TCP/IP & OSI Models. 05

Fifth of a Video Series covering all elements of The Cisco Certified Entry Networking Technician (CCENT) 100-105 ICND1 v3 Blueprint Section: Network Fundamenta

YouTube

IPv4 Public and Private Addresses

In this video from ITFreeTraining I will look at the different types of IPv4 addresses that are available and how they can be used on the internet and inside yo

YouTube

Free CCNA | Network Fundamentals - Day 1 | 200-125 | Free Cisco Video Training - NetworKing - 2018

Free CCNA - Network Fundamentals - Day 1 - In this video lecture, Imran explains the fundamentals of Networking. He goes on to simplify the whole process of why

YouTube

TCP vs UDP Comparison

This is an animated video explaining the difference between TCP and UDP protocols. What is TCP? What is UDP? Transmission control protocol vs user datagram p

YouTube

What is OSI Model?

✅ C'mon over to https://realpars.com where you can learn PLC programming faster and easier than you ever thought possible! ============================= ✅ Ch

YouTube

How a DNS Server (Domain Name System) works.

This is an animated DNS tutorial showing what a DNS server is and how it works. It explains the different levels of DNS, such as the resolver, root server, dom

YouTube

What is a Weir?

The first 500 people will get two months of Skillshare Premium for FREE: https://skl.sh/practicalengineering3 A weir is a small dam built across a river to co

YouTube

Working with Subnets

This video will look at IPv4 subnetting in more detail. Subnetting in IPv4 is the process of taking a network and dividing it in smaller networks. This allows t

YouTube

The OSI Model

The OSI model even though not adopted in modern networks is still referenced in modern networks.

YouTube

TCP/IP and Subnet Masking

Follow the Insanity at: https://www.FailedNormal.com Downloadable Podcasts at: https://failednormal.podbean.com iTunes: https://itunes.apple.com/us/podcast/fail

YouTube

Understanding the OSI Reference Model: Cisco Router Training 101

http://www.soundtraining.net/cisco-router-training-101 The OSI reference model provides a means of understanding how data flows from an application on one comp

YouTube

Common TCP and UDP Ports - CompTIA Network+ N10-006 - 5.9

CompTIA has RETIRED the N10-006 exam series! See NEW CompTIA Network+ videos: http://professormesser.link/007course Network+ Training Course Index: http://pr

YouTube