Foundation Summary

The "Foundation Summary" section of each chapter lists the most important facts from the chapter. Although this section does not list every fact from the chapter that will be on your CCDA

exam, a well-prepared CCDA candidate should at a minimum know all the details in each

"Foundation Summary" before taking the exam.

The CCDA exam requires that you understand the three layers of a hierarchical network design:

■ The core layer and campus-backbone component provide fast transport within sites.

■ The distribution layer and building-distribution component provide policy-based connectivity.

■ The access layer and building-access component provide workgroup and user access to the network.

The Cisco Enterprise Architecture divides the network into six major modules:

■ Enterprise Campus (campus infrastructure, edge distribution, server farm, network management)—The Enterprise Campus module includes the building-access and buildingdistribution components and the shared campus backbone component or campus core. Edge distribution provides connectivity to the Enterprise Edge. High availability is implemented in the server farm, and network management monitors the Enterprise Campus and Enterprise Edge.

■ Enterprise Edge (e-commerce, Internet, VPN/remote access, WAN)—The e-commerce submodule provides high availability for business servers and connects to the Internet submodule.

■ Enterprise WAN—This module provides Frame Relay or other WAN technology. The VPN submodule provides secure site-to-site remote access over the Internet.

■ Enterprise Branch—The Enterprise Branch normally consists of remote offices, small offices, or sales offices. These branch offices rely on the WAN to use the services and applications provided in the main campus.

■ Enterprise Data Center—The Enterprise Data Center consists of using the network to enhance the server, storage, and application servers. The offsite data center provides disaster recovery and business continuance services for the enterprise.

■ Enterprise Teleworker—The Enterprise Teleworker supports a small office, mobile users, or home users providing access to corporate systems via VPN tunnels.

Figure 2-18 shows an Enterprise composite network model, as described here.

Figure 2-18 Cisco Enterprise Architecture

Figure 2-18 Cisco Enterprise Architecture

Cisco Enterprise Architecture

Network availability comes from design capacity, technologies, and device features that implement the following:

■ Workstation-to-router redundancy in the building-access module

■ Server redundancy in the server-farm module

■ Route redundancy within and between network components

■ Media redundancy in the access and distribution modules

Q&A

As mentioned in the introduction, you have two choices for review questions: here in the book or the exam questions on the CD-ROM. The answers to these questions appear in Appendix A.

For more practice with exam format questions, use the exam engine on the CD-ROM.

1. True or false: The core layer of the hierarchical model does security filtering and media translation.

2. True or false: The access layer provides high availability and port security.

3. You add CallManager to the network as part of a Voice over IP (VoIP) solution. In which submodule of the Enterprise Architecture should you place CallManager?

4. True or false: HSRP provides router redundancy.

5. Which Enterprise Edge submodule connects to an ISP?

6. List the six modules of the Cisco Enterprise Architecture for network design.

7. True or false: In the Cisco Enterprise Architecture, the network management submodule does not manage the SP Edge.

8. True or false: You can implement a full-mesh network to increase redundancy and reduce a WAN's costs.

9. How many links are required for a full mesh of six sites?

10. List and describe four options for multihoming to the SP between the Enterprise Edge and the SP Edge. Which option provides the most redundancy?

11. To what Enterprise Edge submodule does the SP Edge Internet submodule connect?

12. What are four benefits of hierarchical network design?

13. In an IP telephony network, in which submodule or layer are the IP phones and CallManagers located?

14. Match the redundant model with its description:

i. Workstation-router redundancy ii. Server redundancy iii. Route redundancy iv. Media redundancy a. Cheap when implemented in the LAN and critical for the WAN

b. Provides load balancing c. Host has multiple gateways d. Data is replicated

15. True or false: Small to medium campus networks must always implement three layers of hierarchical design.

16. How many full-mesh links do you need for a network with ten routers?

17. Which layer provides routing between VLANs and security filtering?

a. Access layer b. Distribution layer c. Enterprise edge d. WAN submodule

18. List the four submodules of the Enterprise Edge.

19. List the three submodules of the SP Edge.

20. List the components of the Internet Edge.

21. Which submodule contains firewalls, VPN concentrators, and ASAs?

b. VPN/Remote Access c. Internet d. Server Farm

22. Which of the following describe the access layer? (Select two.)

a. High-speed data transport b. Applies network policies c. Performs network aggregation d. Concentrates user access e. Provides PoE

f. Avoids data manipulation

23. Which of the following describe the distribution layer? (Select two.)

a. High-speed data transport b. Applies network policies c. Performs network aggregation d. Concentrates user access e. Provides PoE

f. Avoids data manipulation

24. Which of the following describe the core layer? (Select two.)

a. High-speed data transport b. Applies network policies c. Performs network aggregation d. Concentrates user access e. Provides PoE

f. Avoids data manipulation

25. Assuming that there is no Enterprise distribution, which campus submodule connects to the Enterprise Edge module?

a. SP Edge b. WAN submodule c. Building Distribution d. Campus Core e. Enterprise Branch f. Enterprise Data Center

26. Which remote module connects to the enterprise via the Internet or WAN submodules and contains a small LAN switch for users?

a. SP Edge b. WAN submodule c. Building Distribution d. Campus Core e. Enterprise Branch f. Enterprise Data Center

27. Which three types of servers are placed in the e-commerce submodule?

a. Web b. Application c. Database d. Intranet e. Internet f. Public share

Use Figure 2-19 to answer the following questions.

Figure 2-19 Scenario

28. Which is the campus core layer?

29. Which is the Enterprise Edge?

30. Which is the campus access layer?

31. Which is the Enterprise Edge distribution?

32. Which is the campus distribution layer?

33. Which is the campus data center?

This part covers the following CCDA exam topics (to view the CCDA exam overview, visit http://www.cisco.com/web/learning/le3/current_exams/ 640-863.html):

■ Describe Campus Design Considerations

■ Design the Enterprise Campus Network

■ Design the Enterprise Data Center

■ Describe the Enterprise Edge, Branch, and Teleworker Design Characteristics

■ Describe the Functional Components of The Central Site Enterprise Edge

■ Describe WAN Connectivity Between Two Campuses

■ Design the Branch Office WAN Solutions

■ Describe Access Network solutions for a Teleworker

■ Design the WAN to Support Selected Redundancy Methodology

■ Identify Design Considerations for a Remote Data Center

■ Describe Cisco Unified Wireless Network Architectures and Features

■ Design Wireless Network Using Controllers

■ Design Wireless Network Using Roaming

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