Cisco Voice over IP

Transcription

1 Cisco Voice over IP Number: Passing Score: 825 Time Limit: 120 min File Version: This material is copy from pass4sure All answers was collected by print screens. Some answer are correcteds by research on

2 Exam A QUESTION 1 Which two statements describe the purpose of the technology prefix? (Choose two). A. Technology prefixes are configured on gateways to indicate to the gatekeeper whether they support voice or video. B. Technology prefixes must always be configured on gateways. C. Technology prefixes are uses to indentify different types or classes of gateways. D. Technology prefixes are prepended to the destination address by the gateway. E. Technology prefixes have to be unique on each gateway. Correct Answer: CD /Reference: QUESTION 2 Which statement is true about only out-of-band signaling? A. A signaling bit is robbed from each frame B. Signaling bits are sent in a special order in a dedicated signaling frame. C. All signaling is directly associated with its corresponding voice frame. D. All voice pacckets carry their own signaling. Correct Answer: B /Reference: QUESTION 3 Examine the example output. hostname GW1! interface Ethernet 0/0 ip address h323-gateway voip interface h323-gateway voip id GK1-zone1.abc.com ipaddr h323-gateway voip h323-id GW1 h323-gateway voip bind srcaddr ! dial-peer voice 1 voip destination-pattern session-target ras! dial-peer voice 2 pots destination-pattern no register e164! end

3 Choose the command that will restore communication with gatekeeper functionality to this device. A. h323-gateway voip h323-id GK1 B. gateway C. h323-gateway voip bind srcaddr D. h323-gateway voip GW1-zone2.abc.com abc.com ipaddr Correct Answer: B /Reference: QUESTION 4 Refer to the exhibit. Which actions would be initiated by a UAS? (Choose two.) A. contacts the user when a SIP invitation is received. B. originates the REFER method to initiate call termination. C. returns a response on behalf of the user to the invitation originator. D. originates the INVITE method including a description of the session parameters. E. originate the ACK method to indicate that it has received a response to an invitation. Correct Answer: AC /Reference: QUESTION 5 Which option is true concerning the MGCP call agent? A. acts only as recorder of call details B. provides only call signaling and call setup C. manages all aspects of the call and voice stream D. monitors the quality of each call after setup Correct Answer: B

4 /Reference: QUESTION 6 Which statement best describes gatekeeper operation when the technology prefix is matched and the gatekeeper is using the technology prefix with hopoff? A. The gatekeeper always forwards the call to the zone specified in the hopoff command. B. The gatekeeper only forwards the call to the hopoff zone if the zone prefix does not match. C. The gatekeeper attemps to forward the call to the hopoff zone, but if this fails, it will forward the call to the zone specified in the zone prefix command. D. The gatekeeper attempts to forward the call to the zone specified in the zone prefix command first, but if this fails, it will forward the call to the zone specified in the hopoff command. Correct Answer: A /Reference: QUESTION 7 Refer to the exhibit. All IP phones are sccp phones. Phone D makes an internal call to phone G. Which call setup signaling statement is true? A. Phone D signals phone G directly. Call setup is handled by the phones. B. Phone D signals gateway A, which processes the call and signals phone G.

5 C. Phone D signals gateway B, which processes the call and signals phone G. D. Phone D signals gatekeeper. The gatekeeper processes the call and signals phone G. E. Phone D signals the call agent. The call agent processes the call and signals phone G. Correct Answer: E /Reference: QUESTION 8 Refer to the exhibit. All IP phones use SCCP. Fax machine F calls fax machine J. Which call setup signaling statement is correct? A. Fax F signals Fax J directly. Call setup is handled by the fax machines. B. Gateway A processes the call and signals gateway B. Gateway B processes the request. C. Gateway A signals the call agent. The call agent processes the call and signals gateway B. D. Gateway A signals the gatekeeper. The gatekeeper processes the call and signals gateway B. E. Gateway A processes the call and signals gateway B. Gateway B processes the call. During the setup, the gateways query the gatekeeper for address resolution and call setup permission. Correct Answer: E /Reference: QUESTION 9 Refer to the exhibit. Three department managers share the directory number The Marketing manager s phone is attached to port 1/1. The Engineering manager s phone is attached to port 1/2. The Shipping manager s phone is attached to port 1/3. In which situation would an incoming call ring on the Shipping manager s phone?

6 A. The Marketing manager is on the phone. B. None of the managers are on the phone. C. The Engineering manager is on the phone. D. The Shipping manager and Marketing manager are on the phone E. The Engineering manager and Marketing manager are on the phone. Correct Answer: E /Reference: QUESTION 10 Using Cisco Unified Communications Manager Express, what four steps are necessary to implement COR? (Choose four.) A. Configure SRST. B. Define COR labels. C. Configure COR lists. D. Assign COR list to ephone-dn. E. Configure COR lists on the voice ports. F. Configure diall peers and assign COR lists. Correct Answer: BCDF /Reference: QUESTION 11

7 At what point does the MGCP call agent release the setup of the call path to the residential gateways? A. After the call agent has been notified that an event occurred at the source residential gateway. B. After the call agent has been notified of an event and has instructed the source residential gateway to create a connection. C. Does not release call path setup. D. After the call agent has sent a connection request to both the source and destination and has relayed a modify-connection request to the source so that the source and destination can set up the call path. E. After the call agent has forwarded session description protocol information to the destination from the source and has sent a modify connection to the destination and a create-connection request to the source. Correct Answer: D /Reference: QUESTION 12 Which two codes together make up the number that follows the E.164 recommendation numbering scheme? (Choose two.) A. Country code B. subscriber code C. national destination code D. provider code Correct Answer: AB /Reference: QUESTION 13 When using CUBE, which two statements describe how media flow-through differs from media flow-around? (Choose two.) A. Media flow-around provides address hiding by terminating both signaling and RTP streams. B. Media flow-through terminates the signaling channel and the RTP streams flow directly between endpoints. C. Media flow-around and media flow-through function in a similar manner, but media flow-around supports NAT traversal. D. Media flow-through terminates the RTP streams but allows signaling to flow directly between endpoints. E. Media flow-around terminates the signaling stream and allows RTP streams to flow directly between endpoints. F. Media flow-through provides address hiding by terminating both signaling and RTP streams. Correct Answer: EF /Reference: QUESTION 14

8 Refer to exhibit. The Acme Corp. uses H.323 to place calls to their supplier RR industries. Acme also has a voice connection to an ITSP for long distance over a SIP network. Which configuration should Acme use to deploy the CUBE? A. service voice voip allow-connections h323 to h323 allow-connections h323 to sip B. voice service voip allow-connections h323 to h323 allow-connections h323 to sip C. voice service voip allow-connections h323 to h323 allow-connections h323 to sip allow-connections sip to h323 D. service voice voip allow-connections h323 to h323 allow-connections h323 to sip allow-connections sip to sip allow-connections sip to h323 Correct Answer: C /Reference: QUESTION 15 Which two are types of Call Admission Control? (Choose Two.) A. local B. QoS-based C. resource-based D. topology-based E. gateway zone bandwidth F. gatekeeper-controlled RSVP Correct Answer: AC

9 /Reference: QUESTION 16 Using a standalone IOS gateway, which three steps are necessary to implement COR (Choose three.) A. Configure SRST. B. Define COR labels. C. Configure COR lists. D. Assign COR list to ephone-dn. E. Configure COR lists on voice ports. F. Configure dial peers and assign COR lists. Correct Answer: BCF /Reference: QUESTION 17 Refer to the exhibit. You have configured a gatekeeper and an IP-IP gateway on the same router. When you look at the output from the show gatekeeper endpoint command, the IP-IP gateway is not registered with the gatekeeper. What needs to be configured to resolve this issue?

10 A. You need stop and restart the gateway. B. You need to add a Voip dial peer to the configuration. C. The H323-gateway voip id command has a incorrect IP address. D. The H323-gateway voip id command has a incorrect gatekeeper ID and IP address. Correct Answer: B /Reference: QUESTION 18 Which process changes an internal extension into a fully qualified external PSTN number before matching to a dial peer? A. digit masking

11 B. forward digits C. number expansion D. prefix extension Correct Answer: C /Reference: QUESTION 19 The SJ local zone contains a gatekeeper that controls two gateways, SJ1 and SJ2. Both gateways provide access to area code 408. Which two command strings should be entered into the gatekeeper to give the SJ2 gateway priority over the SJ1 gateway? (Choose two.) A. zone prefix SJ 408 gw-priority 6 SJ1 B. zone prefix SJ 408 gw-priority 6 SJ2 C. zone prefix SJ 408 gw-priority 10 SJ1 D. zone prefix SJ 408 gw-priority 10 SJ2 E. zone prefix SJ 408 gw-priority 0 SJ2, 10 SJ1 F. zone prefix SJ 408 gw-priority 6 SJ1, 10 SJ2 Correct Answer: AD /Reference: QUESTION 20 Which command parameter specifies that the router should not attempt to initiate a trunk connection but should wait for an incoming call before establishing the trunk? A. voice-port 1/0:1 B. connection trunk C. ds0-group timeslots 1-23 type ext-sig D. connection trunk answer-mode E. connection-trunk answer-mode Correct Answer: E /Reference: QUESTION 21 Refer to the exhibit. Choose the correct configuration command set that will allow the gateway in zone BR to register with the gatekeeper at HQ so that the gateway is placed in zone BR.

12 A. B. C. D.

13 Correct Answer: C /Reference: QUESTION 22 Which best defines an ACD? A. a telephone system that switches calls between users on local lines B. a local company that provides phone capability and distribution from the phone company s central office. C. a telephone system that responds to a caller with a voice menu and helps to appropriately connect the call D. a telephone system that is connected to the exchange to provide conventional voice services to several subscribers Correct Answer: C /Reference: QUESTION 23 You have been asked to deploy a gatekeeper to support CUBE that will connect your organizational domain to the domain of an Internet Telephony Service Provider so that callers can reach the 407 area code. Which configuration will support this function? A. B. C.

14 D. Correct Answer: D /Reference: QUESTION 24 What is the E.164 standard? A. dial plan B. private numbering plan C. national numbering plan D. international public telecommunications numbering plan Correct Answer: D /Reference: QUESTION 25 You have set up a complex dial plan using translation rules. The following translation rule has been configured. What output would correspond to the test translation-rule command? A. test translation-rule The replaced number: B. test translation-rule The replaced number: C. test translation-rule The replaced number: D. test translation-rule 1 910

15 The replaced number: Correct Answer: A /Reference: QUESTION 26 A customer needs to configure a CAS E & M circuit that will support inbound and outbound DNIS and inbound ANI. Which configuration will accomplish this task? A. pri-group timeslots 1-24 B. ds0-group 0 timeslots 1-24 type none C. ds0-group 0 timeslots 1-24 type e&m-fgd D. ds0-group 0 timeslots 1-24 type fgd-eana E. ds0-group 0 timeslots 1-31 type r2-digital r2-digital-compelled ani Correct Answer: C /Reference: QUESTION 27 To hide identity when initiating calls, Phone B requests that Server B place its calls for it. What kind of device is Server B? A. proxy B. redirect C. registrar D. user agent client E. user agent server Correct Answer: A

16 /Reference: QUESTION 28 Which dial-peer command can set the parameters that search through a series of dial peers for a destination that is not in use? A. hunt B. query C. rotary D. request E. circulate F. distribute Correct Answer: A /Reference: QUESTION 29 Refer to the H.323 message in the exhibit. What is the gateway doing with the gatekeeper?

17 A. initial registration B. full registration C. lightweight registration D. registration retry Correct Answer: C /Reference: QUESTION 30 A customer wants to roll out IP telephony to the regional office. They are currently using the G.711 codec at headquarters Which codec will support voice activity detection and comfort noise generation? A. G.711 B. G.726 C. G.729B D. G Correct Answer: C

18 /Reference: QUESTION 31 Which three services are supported by CUBE when supporting H323-to-SIP calls? (Choose three.) A. SIP causes code B. media flow-around C. media flow-through D. codec transparent support E. Transport Layer Security F. H.261, H.263 and H.264 video codecs Correct Answer: CDE /Reference: QUESTION 32 A B C D Correct Answer: A /Reference: QUESTION 33

19 Select and Place: Correct Answer:

20 /Reference:

21 QUESTION 34 Refer to exhibit. What is the minimum WAN bandwith required to support three simultaneous VOIP calls in this network?

22 A. 19,200 bps B. 51,600 bps C. 79,200 bps D. 247,200 bps Correct Answer: C /Reference: QUESTION 35 Where would you assign COR lists in Cisco Unified Communications Manager Express? A. ephone B. ephone-dn C. voice register dn D. voice register pool Correct Answer: B /Reference: QUESTION 36 What does a gatekeeper do when it matches a technology prefix? A. strips off the technology prefix and sends the matching zone prefix to the remote gatekeeper B. send both the technology prefix and zone prefix to the remote gatekeeper C. strips off the zone prefix and forwards the tecnology prefix to the remote gatekeeper D. strips off both the technology prefix and zone prefix and forwards the remaining destination number Correct Answer: B /Reference:

23 QUESTION 37 Which CUBE configuration will support H.323 protocol interworking and address hiding? A. voice services voip h323 interworking media flow-around B. voice services h323 to h323 h323 interworking media flow-through C. voice services voip all-connections h323 to h323 media flow-around D. voice service voip allow-connections h323 to h323 Correct Answer: D /Reference: QUESTION 38 Which statement is true about MGCP? A. Call completion is always shared, with some intelligence on the endpoint, some on the call agent B. Endpoints always take all actions to complete calls. C. Endpoints may act alone or cooperate with call agent to complete calls. D. Call agents order and direct each step of call completion for the endpoints. Correct Answer: D /Reference: QUESTION 39 A telemarketing firm needs to use number translation for incoming and outgoing calls. They have defined two translation profiles, one for incoming and one for outgoing calls. What can be used to simplify this task? A. dial peer B. voice port C. hunt group D. trunk group E. source IP group Correct Answer: D /Reference: QUESTION 40

24 Refer to the exhibit. Your customer has connected an existing PBX to the IP network. The PBX users can make calls to other extensions on the PBX but are unable to call the test extension All others applications on the IP network are working correctly. Compare the PBX system requirements to the configuration for R1 in the exhibit. Which configuration change will resolve the problem? A. configure forward digits all in dial-peer 1 POTS B. configure wink-start signaling on voice-port 1/1/0 C. configure operation 4-wire and type 5 on voice-port 1/1/0 D. configure operation 2-wire and type 5 on voice-port 1/1/0 Correct Answer: C /Reference: QUESTION 41 Refer to the output from the debug h225 asn1 command in the exhibit. You have configured a gatekeeper with two local zones, hq and br. You want the gateway at the branch location to register with zone BR. What needs to be corrected in the branch gateway to resolve the issue?

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26 A. Change the IP address in the h323-gateway voip id command. B. Change the gatekeeper-id in the h323-gateway voip id command C. Add a zone remote for zone BR so the gateway can register with the correct zone D. Change the gatekeeper-id and the IP address in the h323-gateway voip id command. Correct Answer: B /Reference: QUESTION 42 A. LFI B. RTP C. UDP D. RTCP E. CRTP Correct Answer: B /Reference: QUESTION 43

27 Select and Place: Correct Answer:

28 /Reference: QUESTION 44

29 A. The outbound VoiP diall peer is matched and all digits are sent. B. The digits are stripped off before matching the outbound POTS dial peer. C. The digits are stripped off by the connection trunk and R2 receives only D. R1 collects the 1200 and prepends the tie-line digits That number is matched to a VOIP dial peer and sent to the appropriate address. Correct Answer: A /Reference: QUESTION 45 Refer to exhibit. The Carmichael caller dials the site access code for Merrimack (6) by the four-digit extension number of the destination phone (0124). If the call is going to go accross the IP WAN, which action will have to be taken?

30 A. Translate to B. Strip the site access code and send four digits. C. Strip the site access D. Do nothing because the site access code matches the last five digits of the target number. E. Strip the site access code, send four digits, the prepend the access code when it reaches the Merrimack gateway. Correct Answer: B /Reference: QUESTION 46 Refer to the exhibit. You have a client that is testing a directory gatekeeper in the lab to provide address resolution between two different zones. Two of the commands in the running-config output are incorrect. Which two changes will correct the configuration? (Choose two.)

31 A. replace zone prefix GK-A with zone prefix GK-A B. replace zone prefix GK-B with zone prefix GK-B C. replace zone local DGK acme.com with zone remote DGK acme.com D. replace zone local GK-A acme.com with zone remote GK-A acme.com E. replace zone remote-gk-b acme.com with zone local GK-B acme.com

32 Correct Answer: AD /Reference: QUESTION 47 A. The voice packets are routed through the call agent. B. The voice packets are routed through the gatekeeper. C. The voice packets travel directly from phone to phone. D. The first call leg terminates at gateway A. The second call leg is from gateway A to phone G. E. The first call leg terminates at gateway B. The second call leg is from gateway B to phone G. F. The first call leg terminates at gateway A. The second call leg is from gateway A to its termination at gateway B. The third call leg is from gateway B to phone G. Correct Answer: C /Reference: QUESTION 48 Refer to the exhibit. Your customers dial in to your company using a local number, and their calls cross the WAN to an IVR system. They are complaining tha the IVR system does not always accept their group or may get it wrong. The IVR system has been checked and is working properly. What needs to be added to the dial peer on the incoming H.323 gateway to correct this problem?

33 A. no vad B. tech-prefix 1# C. codec g729ar8 bytes 30 D. dtmf-relay h245-alphanumeric Correct Answer: D /Reference: QUESTION 49 What is the best description of an MGCP endpoint? A. the interconnection between packet and traditional telephone networks B. any analog telephony device (PBX, switch, etc.) C. IP phones D. the gatekeepers in a VOIP network Correct Answer: A /Reference: QUESTION 50 In North America, which E&M signaling type is used most often for geographically separated equipment? A. Type I B. Type II C. Type III D. Type IV E. Type V Correct Answer: B /Reference: QUESTION 51 Which three are supervisory signals? (Choose Three.) A. busy

34 B. on hook C. off hook D. call waiting E. ring Correct Answer: BCE /Reference: QUESTION 52 A. Configure WRR with voice as highest priority. Use ACLs to classify voice traffic. Isolate voice traffic in its own VLAN. Configure access switches to trust traffic from IP phones. B. Configure a PQ with WRR. Use ACLs to classify voice control traffic. Isolate voice traffic in its own VLAN. Configure access switches to trust traffic from IP phones. C. Configure a PQ with WRR. Use ACLs to classify voice traffic. Isolate voice traffic in its own VLAN. Configure access switches to trust traffic from IP phones. D. Configure a PQ with voice control as highest priority. Use ACLs to classify voice control traffic. Isolate voice control traffic in its own VLAN. Configure access switches to trust voice control traffic from IP phones. Correct Answer: C /Reference: QUESTION 53 The D channel in ISDN is an example of which two signaling methods? (Choose two.) A. CAS

35 B. CCS C. In-band D. gateway E. out-of-band Correct Answer: BE /Reference: QUESTION 54 A. voice port 1/0/0 signaling wink-start operation 4-wire auto-cut-through type 1 B. voice port 1/0/0 signaling immediate-start operation 4-wire type5 C. voice port 1/0/0 signaling delay-start auto-cut-trhough operation 4-wire type 3 D. voice port 1/0/0 signaling wink-start operation 4-wire type 4 Correct Answer: A /Reference:

36 QUESTION 55 Which dial plan characteristic shows the most obvious improvement by dropping a number translation step? A. availability B. post-dial delay C. scalability D. hierarchical design Correct Answer: B /Reference: QUESTION 56 A. incorrect destination-pattern in router 1 B. incorrect POTS dial-peer statement in router 2 C. incorrect session-target statement in router 2 D. incorrect port statement in router 1 pots dial peer

37 E. missing no digit-strip on the voip dial peer in router 1 Correct Answer: A /Reference: QUESTION 57 What is the most common E&M type used outside North America? A. Type I B. Type II C. Type III D. Type IV E. Type V Correct Answer: E /Reference: QUESTION 58 Site A uses three-digit internal numbers and remote site Site B uses four-digit internal numbers. All calls to the PSTN are routed through Site B. What dial plan below best represents provision simplicity, assuming the NANP numbering plan? A. Translate all called numbers within Site A to four digits. B. Translate all called numbers within Site B to three digits. C. Translate all called numbers leaving Site A to ten digits. D. Translate all called numbers at either site to ten digits. Correct Answer: C /Reference: QUESTION 59 Refer to the exhibit. Enzo's Bikes manufactures high end bicycle frames. Until recently they sold only to bicycle shops; however, now they are starting to sell to end users. They need a way to add two additional sales staff and ensure that the senior sales technician always gets the first call. Drew is the senior sales technician. Bob is the newest sales technician. Bob's phone should always be the last one chosen for incoming sales calls, after Drew and James. Bob's phone should be chosen first only when Drew and James are busy on calls. Select the correct dial-peer command set for Bob's phone.

38 A. dial-peer voice 3 pots destination-pattern preference 2 B. dial-peer voice 3 pots destination-pattern preference 0 C. dial-peer voice 3 pots destination-pattern preference firstlast D. dial-peer voice 3 pots destination-pattern preference 3 huntstop E. dial-peer voice 3 pots destination-pattern preference high Correct Answer: A /Reference: QUESTION 60

39 A. dial-peer voice 1 pots destination-pattern 5552.[0-5]0 B. dial-peer voice 1 pots destination pattern 5552[5-6].0 C. dial-peer voice 1 pots destination-pattern 555[2-5][5-6] D. dial-peer voice 1 pots destination-pattern 5552[5-6][05]0 Correct Answer: D /Reference: QUESTION 61 Select and Place:

40 Correct Answer:

41 /Reference: QUESTION 62 When setting up a Voip call, what is the first thing a gateway router tries to match to a dialed number? A. call leg B. IP route C. session target D. destination pattern Correct Answer: D /Reference: QUESTION 63 Refer to the IOS configuration in the exhibit. How will the next incoming call be routed?

42 A. The call will be routed to the longest idle channel. B. The call will be routed to the least used channel. C. The call will be routed to a random avaliable channel. D. The call will be routed to the next avaliable channel, starting from channel 1, hunting up toward channel 24. E. The call will be routed to the next avaliable channel, starting from channel 24, hunting down toward channel 1. Correct Answer: E /Reference: QUESTION 64 A new business in Great Britain needs to have a PSTN connection that will handle a maximum of 30 inbound and outbound calls at any given time. The customer only has one slot available on the designated PSTN router. Which digital line type should be recommended? A. QSIG B. ISDN BRI C. ISND E1 PRI D. ISDN T1 PRI Correct Answer: C /Reference: QUESTION 65

43 A. dial-peer voice 1374 pots destination-pattern 1374 port 1/0/0 dial-peer voice 100 voip corlist incoming Intl01 destination-pattern 9011T session target ipv4: B. dial-peer voice 1374 pots destination-pattern 1374 port 1/0/0 dial-peer voice 100 voip corlist outgoing Intl01 destination pattern 9011T C. dial-peer voice 1374 pots corlist incoming LDLst destination-pattern 1374 port 1/0/0 dial-peer voice 100 voip destination-pattern 9011T session target ipv4: D. dial-peer voice 1374 pots corlist outgoing LDLst destination-pattern 1374 port 1/0/0 dial-peer voice 100 voip destination-pattern 9011T

44 session target ipv4: E. dial-peer voice 1374 pots corlist incoming LocalLst destination-pattern 1374 port 1/0/0 dial-peer voice 100 voip corlist outgoing Intl01 destination-pattern 9011T session target ipv4: F. dial-peer voice 1374 pots corlist outgoing LDLst destination-pattern 1374 port 1/0/0 dial-peer voice 100 voip corlist incoming Intl01 destination-pattern 9011T session target ipv4: Correct Answer: E /Reference: