QA

Q&A

The questions and scenarios 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.	How does a Catalyst switch detect that a connected device is capable of using Power over Ethernet?
2.	What type of trunk can be used between a Catalyst switch port and a Cisco IP Phone?
3.	When a trunk is used on an IP Phone, on which VLAN is the data from an attached PC carried?
4.	What is the difference between the VVID and the PVID?
5.	Can the CoS information from the voice traffic be passed when the switchport voice vlan untagged command is used? If so, how?
6.	What is the advantage of using the switchport voice vlan dot1p command?
7.	By default, does a Cisco IP Phone trust QoS information from an attached PC?
8.	The command switchport priority extend cos 5 is entered for a switch port. Is this a good decision? Why or why not?
9.	The show power inline command is used to check the power status on each switch port. If the output is as shown here, what can you assume about interface fastethernet 0/1? Interface Admin Oper Power Device (Watts) ---------- ----- ---------- ------- ------------------- Fa0/1 auto off 0 n/a Fa0/2 auto on 6.3 Cisco IP Phone 7960
10.	What command can verify the QoS trust relationship between an IP Phone and its attached PC?