As a business grows, so does its networking requirements. To keep pace with a business’s expansion and new emerging technologies, a network must be designed to scale. A network that scales well is not only one that can handle growing traffic demands, but also one designed with the inevitable need to expand. This short chapter sets the stage for the rest of the course. This chapter covers the hierarchical network design model, the Cisco Enterprise Architecture modules, and appropriate device selections that you can use to systematically design a highly functional network.
Implementing a Network Design
An enterprise network must be designed to support the exchange of various types of network traffic, including data files, email, IP telephony, and video applications for multiple business units.
Hierarchical Network Design
Users expect enterprise networks to be up _______________ percent of the time. To provide this kind of reliability, enterprise class equipment uses _______________ power supplies and has failover capabilities.
Describe what failover capability means for enterprise class equipment.
Why should a network be organized so that traffic stays local and is not propagated unnecessarily on to other portions of the network?
Designing a network using the three-layer hierarchical design model helps optimize the network. In Figure 1-1, label the three layers of the hierarchical design model.
Figure 1-1 Hierarchical Design Model
Briefly describe each layer of the hierarchical design model.
The Cisco Enterprise Architecture divides the network into functional components while still maintaining the core, distribution, and access layers. The primary Cisco Enterprise Architecture modules include Enterprise Campus, Enterprise Edge, Service Provider Edge, and Remote.
A well-designed network not only controls traffic but also limits the size of failure domains. Briefly describe a failure domain.
Use the list of modules to label the parts of the Cisco Enterprise Architecture in Figure 1-2.
Figure 1-2 Cisco Enterprise Architecture
- Campus Core
- Remote Access & VPN
- Building Distribution
- Internet Connectivity
- Building Access
- Server Farm & Data Center
- WAN Site-to-Site VPN
Identify Scalability Terminology
Match the definition on the left with the term on the right. This is a one-to-one matching exercise.