Wide Area Application Services for Field Engineers

1.After configuring a Cisco WAAS deployment using WCCPv2, you find that you can successfully ping a data center server from a workstation in the branch office. However, when you attempt to start one of the optimized applications, the application cannot communicate with the server. What is the most likely cause?
A. There is insufficient disk space on either the edge or core WAE.
B. You configured half-duplex mode on the WAE interfaces.
C. You configured autonegotiate duplex mode on the WAE interfaces.
D. You deployed the WAE on the same subnet as the users or servers.
Answer: D

2.Refer to the exhibit. Your customer plans to deploy the edge WAE appliances in an off-path, two-arm configuration. The WAE appliances are connected to Cisco Catalyst 6500 Series Switches and use WCCPv2 for traffic interception. The customer wants to minimize the latency added by interception. The customer also wants to know if Layer 2 redirection, rather than GRE tunnels, will improve performance.
What should you tell your customer?
A. Layer 2 redirection can be used only in in-path configurations.
B. Layer 2 redirection can be used only in one-arm configurations.
C. Layer 2 redirection can be used in the customer configuration.
D. GRE tunnels provide better performance than Layer 2 redirection.
Answer: C

3.When implementing Windows authentication for WAE management, what is the maximum allowable time skew between each WAE and the Windows domain controller?
A. 1 second
B. 5 seconds
C. 120 seconds
D. 300 seconds
Answer: D

4.Your customer plans to implement Cisco WAAS using four WAE appliances in a load-balanced configuration. Which feature must be supported on the switches to which the WAE appliances are attached?
A. redirect exclusion
B. Layer 2 redirection
C. WCCPv2
D. WCCPv2 or PBR
Answer: C

5.Your customer has deployed Cisco WAAS using ACE for traffic interception. The customer reports that traffic is not being optimized. Which command would you use to troubleshoot network interception?
A. WAE-CORE# show wccp routers
B. WAE-CORE# show ip access-lists
C. ACE/Admin# show wccp routers
D. ACE/Admin# show rserver detail
E. router# show wccp services
Answer: D

6.Refer to the exhibit. What are two possible reasons the CORE1 WAE might be displayed as “Offline”? (Choose two.)
A. The WAE is powered off.
B. The HTTPS service is disabled.
C. The Central Manager service is disabled.
D. The WAE is configured in the same VLAN as the server nodes.
Answer: AC

642-425:IP Telephony Troubleshooting

1.Auto-Attendant is not registered. Given the Event Viewer output above, what is the most likely problem?
A.The route point has not been defined.
B.The JTAPI server is down
C.The JTAPI provider and client passwords do not match.
D.The route point DN is improperly configured.
Correct:C

642-425:IP Telephony Troubleshooting

2.You have received a trouble ticket that an executive cannot retrieve his account information from his bank. When the call is answered, the executive is prompted to enter his account code. The bank does not seem to recognize the DTMF tones and disconnects the call. What is a possible solution to this problem?
A.Configure progress_ind setup enable 3 under the gateway VoIP dial-peer.
B.Configure progress_ind alert enable 8 under the gateway POTS dial-peer.
C.Configure voice rtp send-rcv in the gateway.
D.Set CallManager Service Parameter ToSendH225UserInfoMsg to True.
Correct:C

3.IP Phone A can make calls to some but not all phones. Phone A cannot call Phone B. The following is the extended ping output from the router interface on the CallManager subnet to the Phone B subnet. Ping 172.16.1.45 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.1.45, timeout is 2 seconds:.!.!. Success rate is 40 percent (2/5) What does this output indicate?
A.CallManager has a good IP path to Phone B.
B.The IP path from CallManager to Phone B has a 20% packet loss problem.
C.The IP phone is turned off, but the switch port it connects to is accessible via IP.
D.Multiple equal cost paths exist from CallManager to Phone B, and one is currently unusable.
Correct:A

4.A company has migrated to a Cisco CallManager IP telephony system and now is replacing the existing voice mail system with a Cisco Unity voice mail system. A small group of users has been established to test the new voice mail system. During testing the users are unable to leave voice mail messages on the new Unity system. It appears that the ports hang when users try to send voice mails. How would you determine the cause of the problem? (Choose two.)
A.Verify that the Cisco CallManager has been configured with the correct number of voice mail ports; the number of voice mail ports must match the Cisco Unity configuration.
B.Verify in the Cisco CallManager that the hunt group is hunting to Cisco Unity ports that can accept calls.
C.Verify the Cisco CallManager has been configured with the correct MWI ports; the number of MWI ports must match the Cisco Unity configuration.
D.Verify the call transfer call handlers are configured correctly.
E.Verify there are no TSP warnings in the Event Viewer.
Correct:A B

5.Three calls can be successfully made across a WAN link. When a fourth call is made, the quality of all four calls degrades. What QoS mechanism can help avoid this problem?
A.LLQ
B.CAC
C.priority queuing
D.classification
E.LFI
Correct:B

6.Following is a partial configuration of an access layer switch: mls qos map cos-dscp 0 8 12 16 28 32 40 46 mls qos ! Voice bearer traffic will be set to which dscp value?
A.46
B.32
C.28
D.12
E.0
Correct:B

642-452:Gateway Gatekeeper Exam (GWGK)

9.A service provider wants to add SIP devices to the existing H.323 voice network. Which Cisco device will allow the SIP devices to use the existing routing structure on the H.323 gatekeeper?
A.SIP voice gateway
B.Cisco SIP Proxy Server
C.Cisco SIP Redirect Server
D.Cisco SIP Registrar Server
Correct:B

10.Refer to the exhibit and the following steps for a call placed between Phone A and Phone B.Phone A calls Phone B.If Phone B does not answer, Phone B continues to ring even if Phone A hangs up.If the call is answered, it stays active until Phone B hangs up, regardless of the actions of Phone A.How can this problem be resolved?
A.the amount of time that the PBX provides power denial is too long to be recognized by the FXO port
B.if the PBX is capable of supporting ground-start signaling, have the FXO port use this feature to receive signal disconnect from the PBX
C.in the configuration of the FXO port turn off tone based supervisory disconnect, this works only with FXS ports
D.configure battery reversal on the FXO port so the PBX is aware when Phone B hangs up
Correct:B

11.Drag Drop question
Correct:
Green choice2—->Yellow Choice1
Green choice3—->Yellow Choice2

12.Refer to the exhibit. A client is in the process of migrating from a traditional PBX telephony system to an IP telephony system at the Tampa headquarters. The client would like to start migrating the regional offices in Nashville and Houston off the existing tie-lines and onto the IP WAN. In which locations would voice-enabled gateways need to be deployed? (Choose four)
A.location 1
B.location 2
C.location 3
D.location 4
E.location 5
F.location 6
Correct:A B C D

13.When COR is used in a gateway, under what circumstance will a call be completed between a specific pair of dial peers?
A.only when the COR lists in the inbound and outbound dial peers are an exact match
B.when the COR list in the outbound dial peer is a subset of the COR list in the inbound dial peer
C.when the COR list in the inbound dial peer is a subset of the COR list in the outbound dial peer
D.when the COR lists in the inbound and outbound dial peers have no matching members
Correct:B

14.Which configuration will provision an E1 for ITU Q421 digital line signaling and compelled register signaling?
A.controller e1 1/0cas-group 1 timeslots 1-31 type r2-digital r2-compelled ani
B.controller e1 1/0cas-group 1 timeslots 1-31 type r2-compelled ani
C.controller e1 1/0cas-group 1 timeslots 1-31 type r2-digital anicas-custom 1signaling r2-compelled
D.controller e1 1/0cas-group 1 timeslots 1-31 type r2-compelledcas-custom 1signaling r2-digital
Correct:A