Specifically we focus on the case of ethernet traffic aggregation over. It can also perform basic routing functions between virtual lans. Osi model data communication and networking notes in pdf. Osi model stands for open system interconnection model. In the network diagrammed above, all links are pointtopoint, and so each interface corresponds to the unique immediate neighbor reached by that interface. Chapter 1 introduction to networking and the osi model. Get data communication and networking notes on osi model including explanation of osi reference model,7 layers of osi model with pdf to download to practice. Osi model defines how data is transferred from one computer to another computer. This work opens with an accessible introduction to computer networks, providing. Application layer supports application, apps, and enduser processes. Computer networks consist of interconnected com puter systems.
This layer is responsible for application services for file transfers, email, and other network software services. Louis 20 raj jain introduction to software defined networking sdn. Pdf network systems design using network processors. Doing so creates a better understanding of the network data flow.
In this paper we present a custom system design of a multiservice access concentrator node. In a very basic scenario two computers connected with a lan and connectors transfer data using the nic. Here are the basic functionalities of the application layer. As we will see in the next chapter, application layer protocols often use.
Osi model and network protocols identifying the osi layers at which various network components operate when you understand the osi model, it is possible to relate the network connectivity devices discussed in chapter 3, networking components and devices, to the appropriate layer of the osi model. Describe the functionality of lan, man, and wan networks. It is important to remember the order of the layers in the osi model. Tcpip tutorial and technical overview ibm redbooks. In other words, each layer has different features and network cases. Presentation application session transport network data link physical layer 7 layer 6 layer 5 layer 4 layer 3 layer 2 layer 1. His is author of the books handson tcpip and snmp network management. It should be noted that with the advent of layer 2 routing see chapter 16 for a discussion of. In this guide, we will discuss osi model in computer network and seven layers of osi model in detail. Each layer provides a service to the layer above it in the protocol specification. The application layer is also called as the layer 7 of the osi model. The process of breaking up the functions or tasks of networking into layers reduces complexity. Note that network layer addresses can also be referred to as logical addresses. Layer 3 the network layer layer 3, the network layer of the osi model, provides an endtoend logical addressing system so that a packet of data can be routed across several layer 2 networks ethernet,token ring, frame relay, etc.