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This chapter is from the book

Review Questions

Answer the following questions, and then refer to Appendix A, "Answers to Review Questions," for the answers.

  1. Which descriptions best define the core layer? (Choose two.)

    1. It aggregates end users and supports a feature-rich environment.
    2. It provides a high-speed, Layer 3 switching environment using hardware-accelerated services.
    3. It performs high-speed routing and packet manipulations.
    4. It provides scalability and fast policy-based connectivity.
    5. It provides the backbone for campus connectivity.
  2. What hardware supports Cisco IOS Software modularity? (Choose all that apply.)

    1. Cisco Catalyst 3750 series
    2. Cisco Catalyst 4500 series
    3. Cisco Catalyst 6500 series
    4. Cisco Catalyst XR series
    5. All Cisco Catalyst series switches
  3. Which statements are correct descriptions of NSF?

    1. It allows the standby RP to takes control of the device after a hardware or software fault on the active RP.
    2. It is a Layer 3 function that works with SSO to minimize the amount of time a network is unavailable to its users following a switchover.
    3. It is supported by the Cisco implementation of EIGRP, OSPF, RIP, and BGP protocols.
    4. It synchronizes startup configuration, startup variables, and running configuration.
    5. The main objective of NSF is to continue forwarding IP packets following an RP switchover.
  4. If you need to implement STP, which version is recommended for the enterprise campus?

    1. CST
    2. HSRP
    3. MST
    4. PVST+
    5. RSTP
  5. What is the enterprise recommendation regarding UDLD?

    1. Adjust the default hello timers to three seconds for aggressive mode.
    2. Enable it to create channels containing up to eight parallel links between switches.
    3. Enable it in global mode and on every interface you need to support.
    4. Enable it in global mode to support every individual fiber-optic and Ethernet interface.
    5. Enable it in global mode to support every individual fiber-optic interface.
  6. Which statements are correct descriptions of EtherChannels? (Choose two.)

    1. EtherChannels can reduce the number of peers by creating a single logical interface.
    2. EtherChannels can increase the number of peers by creating multiple logical interfaces.
    3. OSPF running on a Cisco IOS Software–based switch will not notice a failed link in a bundle.
    4. EIGRP may not change the link cost if there is a failed link in a bundle.
    5. EtherChannel Min-Links feature is supported on PAgP EtherChannels.
  7. Which statements are correct descriptions of EtherChannel load balancing? (Choose three.)

    1. Load balancing using an alternate input hash can be tuned with the cef port-channel load-balance command.
    2. Load balancing using an alternate input hash can be tuned with the port-channel load-balance command.
    3. The default input hash value of Layer 3 for the source and destination does not load balance across the links.
    4. The default input hash value of Layer 3 for source and destination and Layer 4 port does load balance across the links.
    5. To achieve the best load balancing, use alternating hashes in the core and distribution layer switches.
    6. To achieve the best load balancing, use two, four, or eight ports in the port channel.
  8. What are the reasons that passive interfaces should be implemented at distribution layer ports facing the access layer? (Choose two.)

    1. To limit unnecessary peering across the access layer switches when the Layer 2 to Layer 3 boundary is in the distribution layer
    2. To limit unnecessary peering across the access layer switches when the Layer 2 to Layer 3 boundary is in the access layer
    3. To provide high availability in the event of a link or node failure
    4. To support transit traffic through the access layer in the event of a link or node failure
    5. To avoid transit traffic through the access layer in the event of a link or node failure
  9. What are the advantages of GLBP in the distribution layer? (Choose two.)

    1. GLBP provides all the benefits of HSRP and includes load balancing when VLANs do not span the access switches.
    2. A convergence event on the uplink affects only half as many hosts as compared to HSRP when VLANs do not span the access switches.
    3. A convergence event on the uplink affects is processed in half the time as compared to HSRP when VLANs do not span the access switches.
    4. STP can block one of the access layer uplinks, and there is at most a two-hop Layer 2 path for upstream traffic when VLANs span access switches.
    5. STP can block one of the access layer uplinks, and there is at most a two-hop Layer 3 path for upstream traffic when VLANs span access switches.
  10. What is a potential issue when daisy chaining access layer switches?

    1. It is not easy to determine where the root switch is located.
    2. It is very hard to determine how many ports will be in a blocking state.
    3. The design will black-hole traffic and be affected by multiple convergence events with a single network failure.
    4. There is a danger that black holes will occur in the event of a link or node failure when the distribution interconnection is Layer 2.
    5. There is a danger that black holes will occur in the event of a link or node failure when the distribution interconnection is Layer 3.
  11. What is the best mechanism to prevent unicast flooding issues?

    1. Bias the routing metrics to remove equal-cost routes.
    2. Do not span VLANs across multiple access switches.
    3. Span VLANs across multiple access switches.
    4. Tune ARP timers so they exceed CAM timers.
    5. Tune CAM timers so they exceed ARP timers.
  12. What hardware is supported by the Cisco Power Calculator? (Choose all that apply.)

    1. Cisco Catalyst 3750 series
    2. Cisco Catalyst 4500 series
    3. Cisco Catalyst 6500 series
    4. Cisco Catalyst XR series
    5. All Cisco Catalyst series switches
  13. What features do Cisco Catalyst Integrated Security capabilities provide? (Choose three.)

    1. DHCP snooping prevents client attacks on the DHCP server and switch.
    2. Dynamic ARP Inspection adds security to ARP to minimize the impact of ARP poisoning and spoofing attacks.
    3. DHCP snooping prevents client attacks on the DHCP server and switch using the Dynamic ARP Inspection table.
    4. IP Source Guard prevents IP spoofing using the DHCP snooping table.
    5. IP Source Guard prevents IP spoofing using the Dynamic ARP Inspection table.
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