What Is A Definition Of A Two-Tier Lan Network Design?

What is a definition of a two-tier LAN network design?
Normally there are two types of network topology architecture. Now, let us discuss each of these types in detail. They are three-tier architecture and the other one is the two-tier architecture. Planning and the design phases are very important things when we are trying to make a campus network.

Many technologies, variables need to be considered that affect the product selection and the design entirely. The network design can be smaller and more manageable. Each of these tiers is mostly focused on a specific set of roles. This helps the network designer and the architecture in order to optimize and select the right network hardware software and the feature to perform some of the specific roles for the network layer.

Now, let us discuss three tiers and the two-tier model in detail. The three-tier modeling can include all three layers. The three-tier model can mostly be used by large campus networks, in these where multiple distribution layer and building needs to be interconnected. In the three-tier layer, there are three layers.

They are the core layer, distribution layer, and access layer. The access layer is the first tier that is present at the edge of the campus. The access layer can grant the end devices access to the network as shown in the below figure 1.1. It can incorporate the layer 2 switches and the access points by providing connectivity between the two workstations and the servers.

The distribution layer is the second layer in the three-tier architecture that can act as the services and the control boundaries between the access layer and the core layer. The third layer is the core layer, it acts as a network backbone, it is the simplest but the most critical part of the campus layer. The core layer consists of high-speed network devices. It is designed in such as way that it can switch the packets as fast as possible.

Now let us discuss the two-tier network architecture. the two-tier model is most suitable for small to medium-sized campus networks. Here the core and the distribution layer are combined into the form of a single layer called the collapsed core. It is also called the collapsed code distribution architecture. The collab score is when the distribution and the core layer functions are implemented by the single device is the primary motivation for the collapsed core. It reduces the cost by maintaining most of the benefits of the three-tier hierarchical model.

The below figure 1.2 represents the two-tier architecture. Here the system becomes scalable. If we want to add some more users and more switches to the network then this becomes easier and more scalable.
These systems can also provide redundancy i.e it removes the duplicate components that are present. For suppose if any switch gets failed in the network there are some other switches that make the system available all the time. If only the two layers are present then we call it the two-tier architecture if three layers are present then we call it the three-tier architecture.