TestInside 642-415
Unified Communications Architecture and Design : 642-415 Exam
Exam Number/Code: 642-415
Exam Name: Unified Communications Architecture and Design
Questions and Answers: 58 Q&As
Price: $98.00
Update Time: 2008-8-24
“Unified Communications Architecture and Design”, also known as 642-415 exam, is a Cisco certification.
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1. Consider the following customer attributes and choose the correct IP telephony call processing model:
- a large campus that spans two PSAP areas
- a single group of buildings connected via fiber optics
- data VPNs that support multiple contractors and suppliers
- a fully developed three-tier network hierarchy
- connectivity to two different service providers for Internet access
A. single-site call processing B. centralized call processing C. hybrid call processing
D. distributed call processing
Answer: A
2. What information is relevant to choosing an IP telephony centralized call processing model? A. multiple PRIs to the PSTN
B. a campus of six buildings connected via an ATM backbone
C. three small regional sales offices located in the three Western time zones
D. centralized order processing, shipping, and billing for all customer products
E. connectivity to a single service provider that hosts the company web site and provides for Internet access
F. a single six-story building with an IDF on each floor and an MDF in the computer room on the second floor
Answer: C
3. In a TDM PBX to Cisco Unified Communications Manager migration, which three things must be verified from the LAN perspective before IP telephony can be deployed? (Choose three.)
A. the type of wiring in the office
B. the number of PSTN connections needed
C. the number of public IP addresses available
D. the amount of rack space in the equipment rack
E. the amount of power that is available to support new LAN switches
Answer: ADE
4. Ajax wants to ensure that their employees are safe and that they comply with the law. What are four general
E911 responsibilities of an enterprise telephony system? (Choose four.)
A. Enable PSAP call-back.
B. Initiate the update of ALI records.
C. Provide a detailed map of all ERLs.
D. Allow conferencing with internal security personnel.
E. Route calls to the appropriate point (on-net or off-net). F. Deliver appropriate calling party number digits to LEC.
Answer: ABEF
5. What are two conferencing guidelines for a single-site deployment? (Choose two.) A. Use hardware conferencing only for small deployments
B. If available, configure DSPs for flex-mode when there are multiple codec types in use.
C. Group any conferencing resources into MRGLs based on their location, to manage Call Admission Control.
D. Make certain that Meet-Me and Ad-Hoc conference resources each account for a minimum of 5% of the user base.
Answer: BD
6. Ajax needs to provide technical support outside of normal operating hours. They would like to deploy a small test call center to develop the skills necessary to provide phone, chat, and e-mail support. Ajax wants to start with five agents. Which two connection types would be applicable for use with the planned contact center? (Choose two.)
A. PRI B. CAS C. E&M D. QSIG E. POTS
Answer: AB
7. You have decided to use the MGCP signaling protocol for the PSTN gateway at Ajax. Which option is true regarding the use of a gatekeeper in their network?
A. One may be used for CAC.
B. One could be used for address resolution.
C. One may be deployed for both CAC and address resolution. D. A gatekeeper is not applicable in this situation.
Answer: D
8. Ajax has contacted its LEC to obtain an additional range of DIDs. Their current DID range is 555-6000 through
555-6999. The LEC can provide them with an additional range of numbers, 556-6000 through 556-6999. The LEC
is currently sending four digits inbound, so the two DID ranges overlap. What two things can be done to resolve this solution? (Choose two.)
A. Ask the LEC to send five digits.
B. Change internal calls to five-digit dialing.
C. Move to a six-digit dial plan to provide more dialing granularity for all extension numbers.
D. Contact an alternative carrier to see if it can provide a DID range that does not overlap with the current range. Answer: AB
9. Currently, Ajax is considering implementing an IP contact center for the technical support group. As an interim step, calls to the technical support group need to be distributed in a round-robin fashion. Can this be accomplished?
A. Yes, with route groups.
B. Yes, by using call pick-up groups. C. Yes, by implementing hunt groups.
D. Yes, by routing calls via an IVR unit.
E. No, Cisco Unified Contact Center is needed. Answer: C
10. The Ajax network coordinator is concerned that the IP phones can be targeted for malicious attack. When the security is designed for the IP telephony solution, which two methods can be used to help prevent malicious phone attacks? (Choose two.)
A. Ensure the PC port is disabled if a PC is not attached.
B. Isolate the IP phone VLANs from the PC data VLANs.
C. Ensure the IP phone firmware is validated with the Cisco Unified Communications Manager.
D. Ensure the Cisco Unified Communications Manager is configured to disable acceptance of GARP on IP
phones. Answer: BD
11. The Ajax server administrator is interested in determining how the Cisco Unified Communications Manager servers can be monitored and if the system has been compromised. Which two methods can be used to support these requirements and still maintain a high degree of security? (Choose two.)
A. Provide a uniform level of access to all operators, technicians, and system administrators.
B. Turn on event logging in all the Cisco Unified Communications Manager servers and regularly review event logs for the cluster.
C. Enable SNMP on all Cisco Unified Communications Manager servers and change the default community strings.
D. Enable SNMP for all the devices that support IP telephony in the Ajax network and change the default community strings.
E. Send all audit logs to a dedicated log server and filter the reports to view only critical and fatal events. Answer: BC
12. Which four attributes must be considered when designing a secure IP telephony solution? (Choose four.)
A. protection of voice at Layer 2
B. placement of application layer gateways
C. number and sizing of output queue thresholds
D. stateful inspection of all packets on the corporate intranet
E. creation and assignment of VLANs and broadcast domains
F. implementation of packet filters and the establishment of firewalls
Answer: ABEF
13. Which three technologies will allow you to design a solution for protecting voice at Layer 2? (Choose three.)
A. internal VPNs B. IP source guard C. DHCP snooping
D. RFC 1918 addressing
E. secure ARP detection
F. locally administered MAC addresses
Answer: BCE
14. Which four methods can be used to protect IP phones? (Choose four.)
A. Use a firewall with the Cisco Unified Communications Manager cluster to prevent attacks from inside and outside the organization.
B. Dedicate a TFTP server for each voice network segment. C. Prevent/Restrict/Disable GARP.
D. Disable the Settings button. E. Disable the PC port.
F. Use signed loads. Answer: CDEF
15. The Network and Telecom managers are concerned about voice and critical data traffic overwhelming the IP WAN circuit and causing unacceptable delays and poor call quality. Which Call Admission Control mechanism should you plan to deploy for this deployment?
A. RSVP
B. Locations
C. Regions
D. Gatekeeper-based trunks E. MPLS with RSVP Answer: B
16. With the integration of Best into Ajax, the traffic patterns in both of the companies have changed, including
the traffic over the WAN. The new traffic patterns dictate that a T1 circuit is needed. You calculate that data will consume 60% of the available L3 bandwidth on the T1 circuit. Using best practices, what is the maximum number
of voice calls that should be placed between Redmond and the HQ campus without using header compression?
A. 9
B. 17
C. 19
D. 23
E. 26
F. 32
G. 35
Answer: C
17. Which problem occurs if a user from the remote facility located in Redmond is temporarily assigned to the
Ajax Headquarters site, the user takes their IP phone and uses it there, and device mobility is not enabled?
A. Every internal call placed by the user will cross the WAN to the Redmond gateway to be routed correctly.
B. Every call received by the user will first traverse the WAN link and be rerouted by the Redmond gateway.
C. Every on-net call placed by the user will reduce the available WAN voice bandwidth, except calls to Redmond.
D. There is no problem. The phone will register with the same Cisco Unified Communications Manger subscriber
as before and operate correctly. Answer: C
18. There may be times when the IP WAN is out of capacity. What Cisco Unified Communications Manager technology should be deployed so that calls will not cross the WAN when the WAN is at full capacity?
A. AAR B. ARC C. CAC
D. NEHO E. TEHO Answer: C
19. There may be times when the IP WAN is out of capacity. What Cisco Unified Communications Manager technology should be deployed so that calls can be completed when the WAN is at full capacity?
A. AAR B. ARC C. CAC
D. NEHO E. TEHO
Answer: A
20. In the centralized call processing model, what is a disadvantage of using the traditional approach for building classes of service (as compared to the line/device approach)?
A. The minimum number of partitions = (number of classes of service) + (number of sites) + (1 partition for all IP
phone DNs)
B. The maximum number of calling search spaces = (number of classes of service) + (number of sites)
C. The minimum number of partitions = (number of classes of service) * (number of sites) + (1 partition for all IP
phone DNs)
D. The maximum number of calling search spaces = (number of classes of service) * (number of sites) Answer: C
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