Discovery Network Design Chapter 1

Objectives

§Explain how a hierarchical network design creates a stable, reliable, scalable network

§Explain what factors need to be considered when the Core Layer of a network is designed and implemented

§Explain which factors need to be considered when the Distribution Layer of a network is designed and implemented

§Explain which factors need to be considered when the Access Layer of a network is designed and implemented  

§Describe the benefits and security implications of creating server farms 

§Describe the considerations of an implementation of a wireless network design

§Describe the factors that affect the implementation of VPNs, including how remote workers can be supported

Explain How a Hierarchical Network Design Creates a Stable, Reliable, Scalable Network

Network requirements:

Application response time

Ease of management

Fast recovery

Fast troubleshooting

Explain How a Hierarchical Network Design Creates a Stable, Reliable, Scalable Network

§Core Layer:  connects Distribution Layer devices

§Distribution Layer:  interconnects smaller LANs

§Access Layer: provides connections for hosts and end devices

Explain How a Hierarchical Network Design Creates a Stable, Reliable, Scalable Network

Subdividing the three-layer model into modular areas:

1. Server farm

2. Enterprise campus

3. Enterprise edge

Explain How a Hierarchical Network Design Creates a Stable, Reliable, Scalable Network

Steps in network design projects:

Identify the network requirements

Characterize the existing network

Design the network topology and solutions

Explain what Factors Need to be Considered when Designing the Network Core Layer

§Network backbone

§Goals of the Core Layer

  Provide 100% uptime

  Maximize throughput

  Facilitate network growth

Explain what Factors Need to be Considered when Designing the Network Core Layer

§  Combining routing and switching in the same device

§  Redundancy and load balancing

§  High-speed and aggregate links

§  Quick convergence

Explain what Factors Need to be Considered when Designing the Network Core Layer

§     Full mesh topology

§     Partial mesh topology

§     Failure prevention

§     Reducing human error