Why is network layering needed? What is network layering? In order to answer these questions, you need to understand exactly what network layering is and how it works. Layering is defined as the application of more than one function within a data network. For example, there are network topologies which include BPD (Borderless Passive Device), MPLS (MPLS), iSCSI (initiator and target), and Fibre Channel (FC).
In order to understand why network layering is needed, we must first understand how computer networks actually work. Every computer on the network has a processor, a memory chip, and a storage device such as a hard drive or a cache. There exists a routing table that contains the tables specifying the different network connections. Every time a packet of information is sent to the computer, the routing table updates the information stored in the storage and the processor.
At this point, the question becomes “Why is network layer needed?” The answer is quite obvious. When a packet of information is sent from one computer to another, there is a possibility that the routing table might become outdated or even lost. This will result in the information being delivered on unreliable network connections.
With these problems already solved, the network layer can now be easily defined. It is a layer that is used for the purpose of saving the information which is required for the effective operation of a network. This includes things such as database models and other application-layer services. There are currently three layers in a network:
The application layer: The application layer is used for the communication of applications such as web browsers, email servers, and various other protocols such as IMAP and POP3. The advantage of using the application layer is that it reduces costs and improves the latency of the network. The application layer is separated into two sublayers: TCP and UDP.
The second layer: The database model is used for storing the session state and information received by a client. Database models are separated into two layers: the hardware layer and the operating system layer. It is used for retracing the path from a client back to the server and for sending requests to the server. The first layer addresses the need for speed, the second layer provides security.
As mentioned, the application layer can be categorized into three different layers. The first layer is the TCP-based transport layer, which allows connections between computers. This layer is commonly implemented using the BIND and EDQUERY databases. The second layer is the ALTERM FILE command execution protocol, responsible for managing the connection to the server and generating the response to the client. And lastly, there is the SERVER command execution protocol, responsible for receiving, managing, and returning messages received by the server.
In a BIND installation, the TCP and UDP ports are placed on the same server so that they are able to handle connections coming in and going out of a given computer. The third layer, the application layer, is responsible for managing the connections between the client and server and is what makes BIND popular among small, medium, and large businesses. For many companies, there is not much of a choice as to how their network model should look like. With BIND, the topology can be changed easily if the need arises and it also provides a stable and fast network model that will not require changing or reconfiguring servers too often.
When a company deploys BIND, the network layer just consists of three layers, TCP, UDP, and EDQUERY. Since the application layer is very important and requires high priority, it is placed on the top of the three layers. BIND can return a list of matches to a client when the query goes over one of these three layers. The first layer of the three-layer computer network model contains the TCP/IP stack, followed by the local host system (LAS), the Internet service provider (ISP), and finally, the browser, which connects to the LAS and other servers to access the application layer.
If you were to try and do this without BIND, you could end up with your data becoming corrupted, or taking a very long time to download, or any number of problems that can be caused by a network layer being removed too quickly. Adding TCP and UDP as additional layers to the BIND configuration would solve most problems. The major problem is that BIND is not designed to handle the load of having four levels of layer – and it takes quite a bit of effort to add them in without making BIND itself dysfunctional.
There are solutions, however. One solution is to use routing protocols to build the BIND layer on top of TCP and UDP. Routing protocols can be used to provide for the necessary redundancy for the application layer, while also allowing for the necessary functionality to be provided by BIND itself.
The best of these solutions are named routing protocols, and they work by handling all the logic for the BIND operation, while still leaving the user with more control over how their computer network works. In short, if you need BIND to do the heavy lifting, but you also want to retain some control over how it does that, then you should consider using a routing protocol to put the routing in the hands of a simpler computer program. That’s the best solution, and the one that provides the most flexibility.