ch. 15

1.

1 point

You are planning a structured troubleshooting approach for an IP phone registration issue. You just defined the problem; what is your next step?

Create an action plan

Gather the facts

Implement an action plan

Consider the possibilities

2.

1 point

You are troubleshooting an IP phone registration issue. You verify that the IP phone is recieving an IP address with Option 150 from the DHCP server. What should the phone do next after this point?

Contact the TFTP server

Register with the CME router

Update its firmware

Reboot with the new configuration

3.

1 point

What command will display all dial peers that exist on a voice gateway?

debug voice dial-peer summary

debug all voice dial-peer

show dial-peer voice summary

show gateway dial-peer

4.

1 point

After you create your action plan what is the next step?

Document Facts

Consider Possibilites

Implement Action Plan

Gather Facts

5.

1 point

What is the final troubleshooting step for common CME Registration Issues?

Investigate the CME Server itself

Chekc the Voice VLAN assignments

Check the DHCP server

Verify PoE

Check the TFTP Server

6.

1 point

When an IP Phone is not registering through DHCP and when it is statically assigned, what could possibly be the issue?

VLAN

CME

TFTP

DHCP

7.

1 point

What is the default packetization interval on Cisco Routers?

20ms

10ms

50ms

60ms

30ms

8.

1 point

You just finished resolving an outage issue in the voice network. Which of the following should you do as a follow-up measure? (3)

Document the solution

Document the next change window for follow-up

Document the root cause of the issue

Document the changes made to the system

Reboot the devices to ensure the issues does not reappear

9.

1 point

What are two key commands to use to troubleshoot dial-peers?

Show dial-peer voice

Debug voip dialpeer

Show dial-peer voip

Debug voice dialpeer

10.

1 point

You believe one of your Cisco IP phones has not been assigned to the correct voice VLAN. What symptom is typically seen when this occurs?

The PC attached to the IP phone loses network connectivity

The IP phone has unforeseen call restrictions or permissions

The IP phone displays "invalid VLAN" on the screen

The IP phone continually reboots

11.

1 point

What are some of the steps in troubleshooting a DHCP server?

Check the switch configuration

Check the DHCP server

Check the DHCP helper-address

Check the physical connections

Check the IP phone

Check routing configuration

12.

1 point

What is the Bandwidth per call for the G.729A voice codec with 30ms packetiziation interval?

24kbps

19kbps

74kbps

80kbps

13.

1 point

What command shows digits as they are dialed?

Debug jitter

Show dial-peer voice summary

Debug voip

Debug voip dialpeer

14.

1 point

After a Cisco IP phone determines its voice VLAN configuration via CDP, what does it do?

The phone sends out an untagged DHCP request

The phone queries for a TFTP server in the new VLAN

The phone reboots in the new VLAN

The phone sends out a DHCP request tagged with the voice VLAN number

15.

1 point

What steps should you take to troubleshoot TFTP communication?

Check the IP phone

Check routing configuration

Check the DHCP helper-address

All of the above

Check the TFTP server

16.

1 point

What is the one-way delay requirement Cisco recommends to achieve high-quality voice calls?

100ms

200ms

150ms

250ms

17.

1 point

How does a switch deliver voice VLan information to Cisco IP phones?

CDP

UDP

ICMP

TCP

18.

1 point

What command will show the QoS statistics on fa0/1?

int fa0/1 service-map QoS policy output

show IP access-group QoS fa0/1 output

show policy-map interface fa0/1 output

service-policy interface fa0/1 output

19.

1 point

An IP phone boots and displays "Registration Rejected" on the screen. What is the most likely cause of the issue?

The CME router has no appropriate ephone configuration

The TFTP server is not serving the correct files

An ACL is blocking access to the CME router

The MAC address of the phone is in the disallow list

20.

1 point

What are the requirements for High-Quality VoIP Calls with End-To-End (one-way) delay?

155ms

160ms

150ms or less

100ms or less

21.

1 point

What command can you use to verify QoS operations and packet statistics on a specific interface of your CME router?

Show QoS interface

Show service-policy interface

Show policy-map interface

Show run

22.

1 point

What command would you use to verify that the PoE clients have no exhausted the switch power supply?

Show power inline

Show flash

Show power over ethernet

Show run

23.

1 point

You can get a basic monitoring utility each time you purchase a Cisco IP Phone. How retrieve call statistics on an IP Phone?

Pressing the messages button twice

Pressign # twice

Pressing ? twice

Pressing and holding #

24.

1 point

What command can you enter to watch CME process calls as digits are dialed?

Show dialpeer voice

Debug dialpeer voice

Debug voip dialpeer

Debug voice dialed

25.

1 point

What command can be useful to watch the CME router go through the dial peer matching process in real time?

Debug VoIP dialpeer

Show dial-peer voice debug all

VoIP dialpeer debug

Debug dialpeer VoIP

26.

1 point

What are three of the call statistics that are shown on an IP phone when the ? is pressed twice during an active call?

Dial-peer used

TFTP server IP address

Codec

RTP status

Average and max jitter

Packet Size

27.

1 point

The packetization interval represents how much data is included per packet, True or False?

True

False

28.

1 point

When trouble shooting QoS you are working with the routing table for voice.

True

False

29.

1 point

The 802.3af PoE switch sends a small AC voltage on the Ethernet cable, detects an unpowered 802.3af device, and supplies power to the line.

True

False

30.

1 point

Whenever a phone is on an active call, you can press the question-mark button three times to retrieve call statistics.

True

False

31.

1 point

What’s the first step in verifying PoE?

Check PoE switch

Check the IP phone

Check physical connection

Check the PoE router

32.

1 point

A Cisco IP phone is plugged into an Ethernet wall jack. The phone does not respond to the connection. What should your first area of troubleshooting be for this situation?

Ensure that you are using Category 6 Ethernet cable

Verify that the voice VLAN is assigned to the port

Verify PoE configuration

Enable CDP on the interface

33.

1 point

What allows the IP phone to know where to get its configuration file?

option 150

DHCP

TFTP Server

IP helper address

34.

1 point

What is the default packetization interval on Cisco routers?

30ms

60ms

150ms

20ms