Figure 9.17 copied from the text below shows 5 security zones required by the customer. These

zones are prioritized, such that Security Zone 5 provides basic security for the entire network,

and starting with zone 5, zones 4, 3, 2, 1 have increasing degrees of security, and Security Zone

1 with the highest level of security.

For this network:

a. What security mechanisms can be applied within each security zone, and at the interfaces

between security zones, to achieve increasing degrees of security?

Security Zone 1- WAN (Answer)

Security Zone 2- Corporate NOC (Answer)

Security Zone 3- Los Angeles (Answer)

Security Zone 4- Washington, DC (Answer)

Security Zone 5 - (Answer)

b. Which architectural models are most applicable to this network? Show how each model can

be applied.

Figure 9.17 from McCabe Exercise 4, Chapter 9

Minneapolis Security Zone 5 Security Zone 2 Network Network Corporate NOC 30 Devices To Other ASs Network Network 30 Devices Security Zone 4 Network 15 Dial-Up Security Zone 1 Security Zone 3 To Other ASs WAN Routers Network Network Network Network To Other ASs 45 Devices 10 Devices 60 Devices Los Angeles Washington, DC Minneapolis Security Zone 5 Security Zone 2 Network Network Corporate NOC 30 Devices To Other ASs Network Network 30 Devices Security Zone 4 Network 15 Dial-Up Security Zone 1 Security Zone 3 To Other ASs WAN Routers Network Network Network Network To Other ASs 45 Devices 10 Devices 60 Devices Los Angeles Washington, DC