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Cisco 642-452 Exam - CertifySky.com Free 642-452 Sample Questions: 1.Refer to the exhibit. You are working with a client in the lab to test toll bypass. There are two small PBXs designated PBXA and PBXB that have been connected backtoback to simulate a tieline from the PSTN. The client would like to remove the tieline and carry this voice traffic over the IP WAN. Which four main parameters define how the connection will be configured between the gateway and the PBX? (Choose four.)
A.WAN link speeds
B.E&M type and wiring scheme
C.support for option 81 on the PBX
D.start dial supervision signaling
E.address signaling type
F.audio implementation
Answer: B, D, E, F
2.An NMHDV2 is being configured for transcoding. Which Cisco IOS command marks the beginning of the transcoding parameters?
A.dsp services transcoding
B.associate application transcoding
C.dspfarm profile 10 transcoding
D.voicecard 2 transcoding
Answer: C
3.Which dial peer will send calls to the PSTN via the CAS T1 using this controller configuration?controller t1 3/0framing esflinecode b8zsds0group 1 timeslots 124 type e&mwinkstart
A.dialpeer voice 1 potsdestinationpattern 9.@port 3/0:1
B.dialpeer voice 1 potsdestinationpattern 9.@port 3/0:24
C.dialpeer voice 1 potsdestinationpattern 91port 3/0:1
D.dialpeer voice 1 potsdestinationpattern 91port 3/0:24
Answer: C
4.Which three features are available during SRST failover? (Choose three.)
A.music on hold
B.IP phone speed dial
C.distinctive ring
D.call forwarding
Answer: A, B, C
5.Refer to the exhibit. Acme ITSP would like to be able to test an IPtoIP gateway. The company has set up two ITSPs in the lab to simulate a realworld situation. Which set of commands will configure the VZ.ACME gatekeeper correctly?
A.gatekeeper!zone local VZACME acme 10.24.10.43zone remote VZACME acme 10.24.10.44 in
Z1ACMEzone remote Z1AJAX ajax 10.16.8.144 1719 out Z1ACMEzone prefix Z1AJAX 919*
B.gatekeeper!zone local Z1AJAX ajaxzone remote VZACME acme 10.24.10.43 invia Z1AJAXzone remote Z1AJAX ajax 10.16.8.144 1719 outvia Z1AJAXzone prefix Z1AJAX 919*
C.gatekeeper!zone local Z1ACME 10.24.10.44zone remote VZACME acme 10.24.10.43 in Z1ACMEzone remote Z1AJAX ajax 10.16.8.144 1719 out Z1ACMEzone prefix Z1AJAX 919*
D.gatekeeper!zone local VZACME 10.24.10.43zone remote Z1ACME acme 10.24.10.44 invia
VZACMEzone remote Z1AJAX ajax 10.16.8.144 1719 outvia VZACMEzone prefix Z1AJAX 919*
Answer: D
6.In a particular company, field offices route calls to headquarters out IP gateways to the PSTN. The numbers are all of the form 1202454XXXX. When dialing, the field offices wish to dial only the last four digits. Which of the following Cisco IOS commands must be a part of the PSTN dial peer on the field office gateways?
A.no digitstrip
B.prefix 1
C.numexp .... 1202454....
D.rule 1 ^202454 1
Answer: C
7.A company determines that all longdistance calls to area code 603 will route across the WAN. The destination gateway is 10.172.163.5 connected through serial interface 1/0. Which set of Cisco IOS commands will accomplish this?
A.dialpeer voice 100 potsdestinationpattern 1603.......port ipv4:10.172.163.5
B.dialpeer voice 101 voipdestinationpattern 1603.......port 1/0
C.dialpeer voice 102 voipdestinationpattern 1603.......sessiontarget ipv4:10.172.163.5
D.dialpeer voice 103 potsdestinationpattern 1603.......sessiontarget 1/0
Answer: C
8.You have a client that is a national organization that has deployed an IP telephony network across all of the offices. The organization is divided into geographic regions. These regions include the east, the midwest, and the west. The organization would like to deploy a directory gatekeeper to provide dialplan resolution for all of the regions. Which three statements correctly describe a DGK solution? (Choose three.)
A.provides fault tolerance through a full mesh of regional gatekeepers
B.allows up to a fourtier gatekeeper hierarchy to be deployed
C.simplifies regional gatekeeper provisioning
D.does not limit the number of hops in an LRQ
E.allows local zones and LRQ forwarding zones to be mixed
F.The directorygatekeeper maintains states about the forwardedLRQ calls.
Answer: B, C, E
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
Answer: 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 groundstart 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.Which is a use of GKTMP?
A.updating information in directory gatekeepers
B.providing SIP to H.323 protocol translation for RAI in SIP networks
C.querying thirdparty applications to implement specific policy controls
D.transmitting state information to alternate gatekeepers for load balancing
Answer: C
12.Which three functions can be performed by a gatekeeper? (Choose three.)
A.voice QoS
B.admission control
C.zone management
D.address translation
E.voice media transport
F.conferencing for H.323 terminals
Answer: B, C, D
13.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 tielines and onto the IP WAN. In which locations would voiceenabled 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
Answer: A, B, C, D
14.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
Answer: B
15.Which configuration will provision an E1 for ITU Q421 digital line signaling and compelled register signaling?
A.controller e1 1/0casgroup 1 timeslots 131 type r2digital r2compelled ani
B.controller e1 1/0casgroup 1 timeslots 131 type r2compelled ani
C.controller e1 1/0casgroup 1 timeslots 131 type r2digital anicascustom 1signaling r2compelled
D.controller e1 1/0casgroup 1 timeslots 131 type r2compelledcascustom 1signaling r2digital
Answer: A
16.Highland Park Property Development is integrating a Cisco CallManager system with the existing PBX via an E1 QSIG trunk. During testing, the first 15 calls work normally. After 15
simultaneous calls, new calls have no audio path when they are established. How can this problem be resolved?
A.Add the command isdn contiguousbchan to the serial interface.
B.Change the channel selection order from descending to ascending.
C.Add the command isdn negotiatebchan to the serial interface.
D.Increase the ISDN T302 timer to allow more time for call setup.
Answer: A
17.Which two features are benefits of using HSRP for gatekeeper redundancy? (Choose two.)
A.The gatekeepers can load balance.
B.The HSRP priority can be adjusted.
C.End devices do not have to reregister after a primary gatekeeper failure.
D.The gatekeepers may be located across WAN links for spatial redundancy. E.It uses a virtual IP address that is shared between the devices.
Answer: B, E
18.Refer to the exhibit. What is the purpose of the TCL script snippet?
A.process a script exit
B.play an audio prompt
C.terminate a call
D.gather initial digits
E.interrupt a call in progress
Answer: C
19.Refer to the exhibit. You are working with a customer who is using QSIG to create a PINX between the four PBX locations. Tampa, Orlando, and Daytona have PRI connections to the PSTN, and Sebring has a 256kbps connection to the PSTN. The customer would like to start using the existing IP WAN to do toll bypass. The Tampa and Orlando locations use the same PBX manufacturer and Daytona uses a different manufacturer. The PBX in Daytona is configured for DMS100 userside signaling and is using 16 channels. The PRI is using ESF and B8ZS. The client needs some help with configuring this gateway. Which set of commands will make this operate correctly?
A.controller t1 1/0prigroup timeslots 116, 24!interface serial 1/0:23isdn switchtype basic5essisdn
continuousbchanisdn protocolemulate networkno shut
B.controller t1 1/0prigroup timeslots 116, 24framing esflinecode b8zs!interface serial 1/0:16isdn switchtype basicdms100isdn protocolemulate userno shut
C.controller t1 1/0prigroup timeslots 123, 24framing esflinecode hdb3!interface serial 1/0:23isdn switchtype basicnet3isdn protocolemulate network
D.controller t1 1/0prigroup timeslots 116, 24framing esflinecode b8zs!interface serial 1/0:23isdn
switchtype basicqsigisdn protocolemulate networkno shut
E.controller t1 1/0prigroup timeslots 116, 24framing esflinecode b8zs!interface serial 1/0:23isdn
switchtype basicdms100isdn protocolemulate networkno shut
Answer: E
20.Which two functions are provided by a DSP farm? (Choose two.)
A.caller ID
B.transcoding
C.E911
D.directory lookup
E.conference bridging
F.music on hold
Answer: B, E
21.Acme Widgets is having trouble managing its fully meshed gatekeepers. What can be done to ease this administrative problem?
A.install an H.323 proxy server
B.implement a directory gatekeeper
C.group the gatekeepers into clusters
D.separate the gatekeepers into zones
Answer: B
22.What is a benefit of implementing an IPtoIP gateway?
A.provides IP network privacy and trust boundary for security
B.offers equivalent quality and cost savings when compared to backtoback gateways C.works in conjunction with gateway proxies to provide scalable video solutions D.enhances policyrouting capability by assigning carrier IDs to partner gateways Answer: A |
