The layout of networking devices are placed where they will maintain reliablity, calablity and performance.

The current topology is Divided into three physical layers "Core, Distribution, and Access". Each layer will be designed and setup for

1. High Performance

2. Efficient management & troubleshooting

3. Policy creation

4. Scalability

5. Behavior prediction

Core Layer

Distribution

Access

Core layer

Distribution layer

This layer includes LAN-based routers and layer 3 switches. This layer ensures that packets are properly routed between subnets and VLANs in our network design. This layer is also called the Workgroup layer.

Access layer

This layer includes hubs and switches. This layer is also called the desktop layer because it focuses on connecting client nodes, such as workstations to the network. This layer ensures that packets are delivered to end user computers.

When we design our topology in the way described only certain layers are susceptible to congestion from certain types of traffic filtering is done at the correct layer and devices run more efficiently, operate and function for what they were designed for and not be burdend of passing packets to another device that is in a different areay of the network layout.

Management & troubleshooting with the network divided into the three layers allows us to efficiently organize network management and isolate causes of network troubles such as Application related errors we make it easier to locate and excute ways of correcting what is needed to fix and deploy the service to run.

With having three layers we can also set our Policy creation for filters and firewall rules. Devices are located in the correct areas going with the way flow of traffic moves through the OSI layer. Servers and other devices are not going to have to be overloaded from making policy and rules decisions for packets that were not destined for what they are to filtering for since they will be either passed on from the upper layer or droped.

Scalablity for future upgrades will also be easier for growth since the network is divided into functional areas versus having services and servers scattered through out the network.

When planning or managing the network model like this design allows us determine what will happen to the network when new stresses, threats and misc. problems are placed on it in different areas of the LAN/WAN.