Network Sales and Services Handbook

Chapter 14. Network Architecture Introduction

The following topics are covered in this chapter:

• Network Devices

• Hierarchical Network Model

• WAN Oversubscription

Networks can be broken down into four categories, depending on the geographic relation of the network components. These four network categories are as follows:

• Wide Area Network (WAN)—. WANs use interconnections that span geographically separate networks. Figure 14-1 illustrates a WAN.

  

  Figure 14-1. Figure 14-1. WAN

• Campus Area Network (CAN)—. CANs interconnect local area networks (LANs) within a limited geographical space, such as a school campus or a military base. CANs are illustrated in Figure ...