400-051 Exam Questions - Online Test

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Q1. Which two statements describe characteristics of Cisco Unified Border Element high availability, prior to Cisco IOS release 15.2.3T, using a box-to-box redundancy configuration? (Choose two.) 

A. It leverages HSRP for router redundancy and GLBP for load sharing between a pair of routers. 

B. Cisco Unified Border Element session information is check-pointed across the active and standby router pair. 

C. It supports media and signal preservation when a switchover occurs. 

D. Only media streams are preserved when a switchover occurs. 

E. It can leverage either HSRP or VRRP for router redundancy. 

F. The SIP media signal must be bound to the loopback interface. 

Answer: BD 

Q2. Refer to the exhibit. 

IP phone 1 has the MAC address 11111.1111.1111, while IP phone 2 has the MAC address 2222.2222.2222. The first two incoming calls were answered by IP phone 1, while the third incoming call was answered by IP phone 2. What will happen to the fourth incoming call? 

A. Both phones will ring, but only IP phone 2 can answer the call. 

B. Both phones will ring and either phone can answer the call. 

C. Only IP phone 2 will ring and can answer the call. 

D. Neither phone will ring and the call will be forwarded to 2100. 

E. Neither phone will ring and the call will be forwarded to 2200. 

Answer: B 

Q3. Refer to the exhibit. 

Your customer sent you this debug output, captured on a Cisco IOS router (router A), to troubleshoot a problem where all H.323 calls that originate from another Cisco IOS router (router B) are being dropped almost immediately after arriving at router A. What is the reason for these disconnected calls? 

A. Calls were unsuccessful because of internal, memory-related problems on router A. 

B. Calls were rejected because the called number was denied on a configured class of restriction list on router A. 

C. Calls were rejected because the VoIP dial peer 1002 was not operational. 

D. Calls were unsuccessful because the router B IP address was not found in the trusted source IP address list on router A. 

E. Calls were rejected by router A because it received an admission reject from its gatekeeper because of toll fraud suspicion. 

Answer: D 

Q4. Which Call Control Discovery function allows the local Cisco Unified Communications Manager to listen for advertisements from remote call-control entities that use the SAF network? 

A. CCD advertising service 

B. CCD requesting service 

C. SAF forwarder 

D. SAF enabled trunks 

E. CCD registration service 

Answer: B 

Q5. Refer to the exhibit. 

All displayed devices are registered to the same Cisco Unified Communications Manager server and the phones are engaged in an active call. Assuming the provided configurations exist at the phone line level and multicast MOH is disabled clusterwide, what will happen when the user of IP Phone B presses the Hold softkey? 

A. IP Phone A receives audio source 2 from MOH Server A. 

B. IP Phone A receives audio source 3 from MOH Server A. 

C. IP Phone A receives audio source 2 from MOH Server B. 

D. IP Phone A receives audio source 3 from MOH Server B. 

E. IP Phone A receives audio source 1 from MOH Server A. 

Answer: B 

Q6. The iLBC codec operates at 38 bytes per sample per 20-millisecond interval. What is its codec bit rate in kilobits per second? 

A. 6.3 

B. 13.3 

C. 15.2 

D. 16 

E. 24 

Answer: C 

Q7. Which two mechanisms does Cisco EnergyWise use for neighbor discovery? (Choose two.) 

A. multicast 

B. LLDP-MED 

C. UDP broadcast 

D. Cisco Discovery Protocol 

E. TCP 

Answer: CD 

Q8. You have implemented 5-digit forced authorization codes to all international route patterns on Cisco Unified Communications Manager. Your users report that after entering the FAC codes, they must wait for more than 10 seconds before the call is routed. 

Which procedure eliminates the wait time? 

A. Check and eliminate any existing route patterns that overlap with the international route pattern. 

B. Go to the Cisco Unified Communications Manager Service Parameters and reduce the T-304 number to 5000 milliseconds. 

C. Request your long distance telephone service provider to reduce the call setup time to 5 seconds. 

D. Configure a # (hash) sign to the end of the forced authorization codes to signal the end of dialing. 

E. Educate the users to press # (hash) after entering the forced authorization codes. 

Answer: E 

Q9. Refer to the exhibit. 

You received this debug output to troubleshoot a Cisco IOS MGCP gateway problem at a customer site. What is the purpose of this message? 

A. The MGCP gateway uses this message to respond to an RQNT message from Cisco Unified Communications Manager. 

B. The MGCP gateway uses this message to respond to an AUCX message from Cisco Unified Communications Manager. 

C. The MGCP gateway uses this message to respond to an AUEP message from Cisco Unified Communications Manager. 

D. The MGCP gateway uses this message to respond to a DLCX message from Cisco Unified Communications Manager. 

E. The MGCP gateway uses this message to respond to an NTFY message from Cisco Unified Communications Manager. 

Answer: C 

Q10. According to ITU-T E.164 recommendations, which two fields in the National Significant Number code may be further subdivided? (Choose two.) 

A. Country Code 

B. National Destination Code 

C. Subscriber Number 

D. Regional Significant Number 

E. Local User Code 

F. National Numbering Plan 

Answer: BC