The questions in this book are more difficult than what you should experience on the actual exam. The questions do not attempt to cover more breadth or depth than the exam; however, they are designed to make sure that you know the answers. Rather than allowing you to derive the answers from clues hidden inside the questions themselves, the questions challenge your understanding and recall of the subject. Hopefully, these questions will help limit the number of exam questions on which you narrow your choices to two options and then guess.
The answers to these questions can be found in Appendix A.
| 1. | What are some benefits of an EtherChannel? |
| 2. | How many links can be aggregated into an EtherChannel? |
| 3. | Traffic between two hosts will be distributed across all links in an EtherChannel. True or false? |
| 4. | Which methods can you use to distribute traffic in an EtherChannel? |
| 5. | How does an EtherChannel distribute broadcasts and multicasts? |
| 6. | When load balancing, what hashing functions choose a link for a frame? |
| 7. | What protocols can negotiate an EtherChannel between two switches? |
| 8. | Suppose a switch at one end of an EtherChannel is configured to use source MAC addresses for load balancing. The switch on the other end is configured to use both source and destination IP addresses. What happens? |
| 9. | Two switches have a four-port EtherChannel between them. Both switches are load balancing using source and destination IP addresses. If a packet has the source address 192.168.15.10 and destination address 192.168.100.31, what is the EtherChannel link index? |
| 10. | What does the acronym PAgP stand for? |
| 11. | Two switches should be configured to negotiate an EtherChannel. If one switch is using PAgP auto mode, what should the other switch use? |
| 12. | What is the LACP system priority value used for? |
| 13. | Complete the following command to put an interface into EtherChannel group 3 and to use PAgP to ask the far-end switch to participate in the EtherChannel. This switch port also should require PAgP packets back from the far-end switch. Switch(config-if)# channel-group __________
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| 14. | What interface configuration command is needed to select LACP as the EtherChannel negotiation protocol? |
| 15. | What command could you use to see the status of every port in an EtherChannel? |
| 16. | What command could you use to verify the hashing algorithm used for EtherChannel load balancing? |
| 17. | Suppose that a switch is used in a small data center where one server offers an IP-based application to many clients throughout the campus. An EtherChannel connects the data-center switch to a Layer 3 core switch, which routes traffic to all clients. What EtherChannel load-balancing method might be most appropriate at the data-center switch? Source MAC address Source IP address Destination MAC address Destination IP address Source and destination MAC address Source and destination IP address
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| 18. | Suppose that a mainframe is connected to a switch that has an EtherChannel uplink to a campus network. The EtherChannel has been configured with the port-channel load-balance src-dst-ip command. Most of the mainframe traffic is SNA (non-IP). What will happen to the SNA frames when they are switched? Would it be better to reconfigure the channel with port-channel load-balance src-dst-mac? |
| 19. | What attributes of a set of switch ports must match to form an EtherChannel? |
| 20. | What happens if one port of an EtherChannel is unplugged or goes dead? What happens when that port is reconnected? |
