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Review Questions

Answer the following questions, and then refer to Appendix A for the answers.

  1. Figure 3-38 presents a sample hierarchically structured network. Some of the devices are marked with letters. Map the marked devices to the access, distribution, and core layers in this figure.

    Figure 3-38

    Figure 3-38 Hierarchical Network

  2. Describe the role of each layer in the hierarchical network model.

  3. True or false: Each layer in the hierarchical network model must be implemented with distinct physical devices.

  4. Which two statements are true?
    1. UplinkFast immediately unblocks a blocked port after root port failure.
    2. PortFast immediately puts a port into the forwarding state.
    3. UplinkFast immediately puts a port into the forwarding state.
    4. PortFast immediately unblocks a blocked port after root port failure.
  5. What features of a multilayer switch could be used in the access layer?

  6. Which layer in the hierarchical model provides media translation?

  7. Why might the distribution layer need to redistribute between routing protocols?

  8. What are three roles of the hierarchical model's core layer?
    1. Provide fast and efficient data transport
    2. Provide maximum availability and reliability
    3. Provide access to the corporate network via some wide-area technology
    4. Implement security policies
    5. Delineate broadcast domains
    6. Implement scalable routing protocols
  9. What is a benefit of using multilayer switching in the core network layer?

  10. What are the six major functional areas in the Cisco Enterprise Architecture?

  11. What are the modules and layers within the Enterprise Campus functional area?

  12. The Enterprise Edge functional area includes which modules?

  13. The Service Provider functional area is composed of which modules?

  14. Which module of the Cisco Enterprise Architecture includes wireless bridging connectivity to remote locations?

  15. What is an advantage of using the Cisco Enterprise Architecture?

  16. What is the Campus Core layer's role?

  17. Indicate which types of devices would be found in each of these modules (note that some devices are found in more than one module).


    • E-commerce module
    • Internet Connectivity module
    • Remote Access and VPN module


    • Web servers
    • SMTP mail servers
    • Firewalls
    • Network Intrusion Detection System (NIDS) appliances
    • DNS servers
    • ASAs
    • Public FTP servers
  18. What is the role of the Service Provider functional area?

  19. Which other module has a design similar to that of the Enterprise Branch module?

  20. Which other module has an architecture similar to that of the Enterprise Data Center module?

  21. Which module of the Cisco Enterprise Architecture provides telecommuter connectivity?

  22. The SONA interactive services layer includes both ___________ services and ______________ services.

  23. How can the Server Farm module be involved in an organization's internal security?

  24. High availability from end to end is possible only when ___________ is deployed throughout the internetwork.

  25. What is the purpose of designing route redundancy in a network?

  26. A full-mesh design is ideal for connecting a ________ number of devices.
    1. small
    2. large
  27. True or false: Backup links can use different technologies.

  28. What components are required for IP telephony?

  29. What role does the Building Access layer play in voice transportation?

  30. What should you consider when evaluating an existing data infrastructure for IP telephony?

  31. What are the main components of a centralized WLAN deployment?

  32. What is a Cisco WAE appliance?

  33. What is a network management agent?

  34. How does an SNMPv1 manager request a list of data?

  35. How does an SNMPv2 manager request a list of data?

  36. What is the MIB structure?

  37. How are private MIB definitions supported?

  38. What are the RMON1 groups?

  39. What groups are added to the RMON1 groups by RMON2?

  40. How does RMON simplify proactive network management?

  41. What is a NetFlow network flow?

  42. How does NetFlow compare to RMON?

  43. At which layer does CDP work?

  44. Two routers are connected via Frame Relay, but ping is not working between them. How could CDP help troubleshoot this situation?

  45. What are the syslog severity levels?

  46. What syslog severity level is indicated by the messages in Example 3-2?

    Example 3-2. Sample Message for Question 46

    20:11:58: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down
    20:12:04: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
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