350-801 practice questions 211–220

1. Question 211 · 450 in bank

   Select 2

   What are two Cisco UCM location bandwidths that are deducted when G.729 and G.711 codecs are used? (Choose two.)

   • AIf a call uses G.729, Cisco UCM subtracts 16k
   • BIf a call uses G.711, Cisco UCM subtracts 80k
   • CIf a call uses G.729, Cisco UCM subtracts 24k
   • DIf a call uses G.711, Cisco UCM subtracts 64k
   • EIf a call uses G.729, Cisco UCM subtracts 40k

   Show answer

   Answer: BC

   Explanation

   https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/trouble/10_0_1/CUCM_BK_TA380A6B_00_troubleshooting-guide-cucm-100.pdf per this document: • If the call is using G.711, Cisco Unified Communications Manager subtracts 80k. • If the call is using G.723, Cisco Unified Communications Manager subtracts 24k. • If the call is using G.729, Cisco Unified Communications Manager subtracts 24k.

   Source: Adapted from community discussion — WeNt48

   References

   • Cisco documentation
   • Cisco documentation

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2. Question 212 · 450 in bank

   

   Refer to the exhibit. An engineer configures ISDN on a voice gateway. The provider confirms that the PRI is configured with 10 channels the engineer ordered and is working from the provider side, but the engineer cannot get a B-channel to carry voice. The rest of the configuration for the serial interface and voice network is functioning correctly. Which actions must be taken to carry voice?

   • AThe engineer must activate the controller card on the voice gateway before configuring the device.
   • BThe engineer used a T1 interface but must use an E1 interface.
   • CThe pri-group timeslots command must be 0-9 for the 10 channels because all values on a router start with 0.
   • DThe engineer must manually revert the order of using the channels.

   Show answer

   Answer: B

   Explanation

   D: is very likely the correct answer. A - is not correct, one cannot enter controller T1 interface if the Controller Card is not activated. B - is very unlikely. There is no indication of T1 vs E1, which normally only use outside of USA. C - is incorrect, the pri-group timeslot 1-10 cannot be 0-9 as "0" is not a valid number on Cisco IOS. D - since this is only fractional T1 circuit 1-10, by default IOS outbound calls are in descending order. All outbound calls will go out from bottom up(B-channel 23 and up) unless you manually configure the isdn busy b-channel XX to direct the IOS router not to sending calls out as a full T1 circuit. Therefore by manually revert the order of using the channels will work in this case. Understanding doing so may create glare but this is beside the point for this question.

   Source: Adapted from community discussion — JC2008

   References

   • Cisco documentation
   • Cisco documentation
   • Cisco documentation
   • Cisco documentation
   • Cisco documentation

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3. Question 213 · 450 in bank

   Select 2

   What are two key features of the Expressway series? (Choose two.)

   • AIP to PSTN call connectivity
   • BB2B calls
   • CVPN connection toward the internal UC resources
   • DSIP header modification
   • Edevice registration over the Internet

   Show answer

   Answer: BE

   Explanation

   B and E - Registration directly to Expressway. This option is new in Expressway X8.9. Registering users and devices directly to Expressway (both SIP and H.323 registrations are supported with Expressway-C, and proxy SIP registration is supported with Expressway-E) enables you to extend video-centric services to users. and Feature is ofc b2b

   Source: Adapted from community discussion — Panda_man

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4. Question 214 · 450 in bank

   What is the maximum number of servers that are in an IM and Presence presence redundancy group?

   • A10
   • B4
   • C6
   • D2

   Show answer

   Answer: D

   References

   • Cisco documentation

   Next question

5. Question 215 · 450 in bank

   Which configuration concept allows for high-availability on IM and Presence services in a UC environment?

   • AIM and Presence subclusters (configured on Cisco UCM)
   • BPresence Redundancy Groups (configured on Cisco UCM)
   • CPresence Redundancy Groups (configured on Cisco Unified IM and Presence)
   • DIM and Presence subclusters (configured on Cisco Unified IM and Presence)

   Show answer

   Answer: B

   References

   • Cisco documentation

   Next question

6. Question 216 · 450 in bank

   An administrator uses the Cisco Unified Real-Time Monitoring Tool to investigate recent calls on a Cisco UCM cluster. The SIP trace for an on-net, direct-media call shows two 180 Ringing and two 11 BYE messages. Why are there multiples of each message type in the trace?

   • AThe source phone sends a 180 Ringing signal to the Cisco UCM, which sends a 180 Ringing signal to the destination phone. The same process applies to 11 BYE messages.
   • BThe source phone must signal to the destination phone that it is ringing, and the destination phone signals back with a 180 Ringing message. The same process applies to 11 BYE messages.
   • CThe destination phone signals back to the Cisco UCM that it is ringing, and the Cisco UCM signals back to the source phone.
   • DThe calls have an MTP in the call path due to different codec support. The calls are subsequently split into two call legs.

   Show answer

   Answer: C

   Explanation

   the source phone doesn't "ring". it receives a "ringing" packet from the CUCM which receives it from the destination phone. that's why there are 2 messages.

   Source: Adapted from community discussion — auswar3ft

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7. Question 217 · 450 in bank

   An engineer is going to redesign a network, and while looking at the QoS configuration, the engineer sees that a portion of the network is marked with AF42. Which type of traffic is marked with this tag?

   • Avoice
   • Bstreaming video
   • Csignaling
   • Dvideo conference

   Show answer

   Answer: D

   Explanation

   AF42 is a DSCP value that indicates Assured Forwarding (AF) class 4, which provides medium-high drop probability and moderate latency for traffic with a class selector (CS) value of 4 and a drop precedence (DP) value of 2. This type of marking is commonly used for video conferencing traffic. Therefore, the correct answer is D, video conference.

   Source: Adapted from community discussion — Testme1235

   References

   • Cisco documentation
   • Cisco documentation

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8. Question 218 · 450 in bank

   How many minutes does it take for automatic fallback to occur in a Presence Redundancy Group if the primary node lost a critical service?

   • A5 min
   • B10 min
   • C30 min
   • D60 min

   Show answer

   Answer: C

   Explanation

   Enable Automatic Fallbackג€"This parameter specifies whether to do automatic fallback. In the event of a failover, the IM and Presence Service moves users automatically from the backup node to the primary node thirty minutes after the primary node returns to a healthy state. Reference: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/im_presence/configAdminGuide/11_5_1/cup0_b_config-and-admin-guide-1151su5/ cup0_b_imp-system-configuration-1151su5_chapter_0100.html

   References

   • Cisco documentation

   Next question

9. Question 219 · 450 in bank

   A company wants to enable secure communications with remote users. Which statement describes the functions of Expressway-E devices in the Cisco collaboration architecture?

   • AExpressway-E supports voice calls, video calls, and IM and Presence federation, whereas Cisco Unified Border Element provides only voice and video calls functionality.
   • BExpressway-E supports video calls and IM and Presence federation, whereas Cisco Unified Border Element provides only voice calls and IM and Presence federation functionality.
   • CExpressway-E supports video calls and IM and Presence federation, whereas Cisco Unified Border Element provides only voice calls functionality.
   • DExpressway-E supports voice calls video calls, and IM and Presence federation, whereas Cisco Unified Border Element provides only voice calls functionality.

   Show answer

   Answer: A

   References

   • Cisco documentation

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10. Question 220 · 450 in bank

    When setting a new primary DNS server in the Cisco UCM CLI, what is required for the change to take effect?

    • Arestart of CallManager service
    • Brestart of DirSync service
    • Crestart of the network service
    • Drestart of TFTP service

    Show answer

    Answer: C

    Explanation

    You don't have to restart the call manager service. Actually according to this guide (read at the bottom) you don't have to restart anything, it restarts network services for you. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/12_5_1SU1/adminGd/cucm_b_administration-guide-1251SU1/cucm_b_test-adminguide_chapter_011110.html

    Source: Adapted from community discussion — Omitted

    References

    • Cisco documentation

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350-801 practice, question 211. 450 questions available.