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QUESTION 77
Calculate the percentage of bandwidth that is saved for one G.729 call crossing a Frame Relay link when ip rtp header-compression is enabled. The Frame Relay overhead is 4 bytes. The G.729 codec bit rate is 8 kb/s. Assume UDP checksum is enabled.
A. approximately 55 percent
B. approximately 85 percent
C. approximately 20 percent
D. approximately 65 percent
E. approximately 60 percent
Correct Answer: D
QUESTION 78
Which E1 time slots are used to carry encoded voice only?
A. timeslots to 15, and 17 to 31
B. time slots 1 to 32
C. time slots 1 to 15, and 17 to 31
D. timeslots to 15, and 17 to 32
E. timeslots to 31
Correct Answer: C
QUESTION 79
Refer to the exhibit. In this IPv4 packet, which bits in the ToS byte are used for ECN?
A. bits 0,1
B. bits 0,1,2
C. bits 2, 3,4 D. bits 5, 6, 7
E. Bits 6, 7
Correct Answer: A
QUESTION 80
These three-class policies use MQC tools whenever possible. Which of the policies will effectively provision for IP telephony traffic being carried over a 768 kb/s Frame Relay PVC using Cisco recommended best-practice parameters?
A. policy-map WAN-EDGE class VOICE priority percent 33 compress header ip rtp class CALL-SIGNALING bandwidth percent 5 ! policy-map HQC-FRTS-768 class class-default shape average 729600 7296 0 service-policy WAN-EDGE ! interface Serial2/0.12 point-to-point frame-relay interface-dlci 102 class FR-HAP-CLASS-768 map-class frame-relay FR-HAP-CLASS-768 service-policy output HQC-FRTS-768 frame-relay fragment 960
B. policy-map WAN-EDGE class VOICE priority percent 33 class CALL-SIGNALING bandwidth percent 5 ! policy-map HQC-FRTS-768 class class-default shape average 768000 7680 0 service-policy WAN-EDGE ! interface Serial2/0.12 point-to-point frame-relay interface-dlci 102 class FR-HAP-CLASS-768 ! map-class frame-relay FR-HAP-CLASS-768 service-policy output HQC-FRTS-768
C. policy-map WAN-EDGE class VOICE priority percent 33 compress header ip rtp class CALL-SIGNALING bandwidth percent 5 ! policy-map HQC-FRTS-768 class class-default shape average 729600 7296 0 fragment frfl2 960 service-policy WAN-EDGE ! interface Serial2/0.12 point-to-point frame-relay interface-dlci 102 class FR-HAP-CLASS-768
D. policy-map WAN-EDGE class VOICE
priority percent 70
class CALL-SIGNALING
bandwidth percent 5
!
policy-map HQC-FRTS-768
class class-default
shape average 729600 7296 0
service-policy WAN-EDGE
!
interface Serial2/0.12 point-to-point
frame-relay interface-dlci 102
ip rtp header-compression
class FR-HAP-CLASS-768
!
map-class frame-relay FR-HAP-CLASS-768
service-policy output HQC-FRTS-768
frame-relay fragment 960
E. policy-map WAN-EDGE class VOICE priority percent 33 class CALL-SIGNALING bandwidth percent 5 ! policy-map HQC-FRTS-768 class class-default shape average 729600 7296 0 compress header ip rtp service-policy WAN-EDGE ! interface Serial2/0.12 point-to-point frame-relay interface-dlci 102 class FR-HAP-CLASS-768 ! map-class frame-relay FR-HAP-CLASS-768 service-policy output HQC-FRTS-768 frame-relay fragment 640
Correct Answer: C
QUESTION 81
Which Cisco Unified Communications Manager route pattern character represents zero or more occurrences of the previous digit or wildcard?
A. !
B. +
C. *
D. .
E. ?
Correct Answer: E
QUESTION 82
How is fax pass-through traffic treated over IP WAN connections that use the G.729 codec?
A. The fax traffic is demodulated and sent with VAD and echo chancellor disabled.
B. When the TGW detects the CED tone from the fax machine that has been contacted, the TGW changes to the G.711 codec with echo chancellor and VAD disabled.
C. When the OGW detects the CED tone from the fax machine that is making the call, the OGW is informed by the contacted device of the Cisco NSF features and switches to the G.711 codec with VAD disabled.
D. The contacting fax machine sends a TCF message to the contacted fax machine and waits for a CFR message. When the CFR message is received, the fax tones sent by the contacting fax machine cause the OGW to send an NSF message to the TGW, instructing it to switch to the G.711 codec with echo chancellor and VAD disabled.
Correct Answer: D
QUESTION 83
According to the Cisco QoS SRND guide, cRTP is recommended on which link speed?
A. lower than or equal to 10 Mb/s
B. lower than or equal to 384 kb/s
C. lower than or equal to 1.544 Mb/s
D. lower than or equal to 768 kb/s
E. lower than or equal to 512 kb/s
Correct Answer: E
QUESTION 84
An IP phone user just answered an incoming call by lifting the handset. Assuming that the IP phone uses SCCP, which SCCP message will Cisco Unified Communications Manager transmit to this called IP phone immediately after receiving notification about the off-hook event?
A. Station Media Port List message
B. Station Set Ringer message
C. Station Stop Tone message
D. Station Start Media Transmission message
E. Station Open Receive Channel message
Correct Answer: B
QUESTION 85
Which three statements about a modem pass-through call are correct? (Choose three.)
A. Clear-channel codec is used to transport modem tones.
B. G.711 mu-law codec is used to transport modem tones.
C. VAD is disabled.
D. VAD is enabled.
E. NLP is disabled. F NLP is enabled.
Correct Answer: BCE
QUESTION 86 PS：由于原CCIE语音群已满请大家转到新 CCIE-QQ(500人)群：53357075 —王Sir
Refer to the exhibit. What is the maximum number of inbound calls to 2001 before a Cisco Unified Communications Manager Express system returns a user busy tone to any additional calls?
A. 3
B. 4
C. 5
D. 6
E. 7
Correct Answer: E
QUESTION 87
You are deploying a new Cisco Unified Communications solution that utilizes a centralized call processing model. Which method of CAC is recommended for this type of solution?
A. RSVP-based
B. gatekeeper-based
C. CUBE-based
D. locations-based
Correct Answer: D
QUESTION 88
Which Cisco IOS CLI command can be used to identify the high jitter level of an RTP stream on a Cisco IOS voice gateway?
A. show call active voice brief
B. show voip rtp connections
C. show voice dsp detailed
D. show voice call summary
E. show policy-map interface
Correct Answer: A
QUESTION 89
Refer to the exhibit. This Cisco Unified Communications Manager trace shows a SIP message that is sent by a SIP Cisco Unified IP Phone 7965 to Cisco Unified Communications Manager. Which of these regarding the content of this SIP message is correct?
A. phone registration message to the primary Cisco Unified Communications Manager
B. keepalive message to the primary Cisco Unified Communications Manager
C. phone registration message to the secondary Cisco Unified Communications Manager during a server failover
D. keepalive message to the secondary Cisco Unified Communications Manager
E. phone registration message to the primary Cisco Unified Communications Manager during fallback
Correct Answer: B
QUESTION 90
Which two analog voice interfaces support ground-start? (Choose two.)
A. FXS
B. E&MTypel
C. E&MTypell
D. E&MTypelV
E. FXO
Correct Answer: AE
QUESTION 91
When using DNS, what does the TC bit indicate?
A. The total response size was greater than 512 bytes, and the data that does not fit was required CCIE WRITTEN v 3.0
B. The DNS response was less than 512 bytes, and the data required padding.
C. The packet was greater than 1024 bytes, and the data was possibly damaged.
D. The pointer to the RRset that will provide the correct data due to possible damage
Correct Answer: A
QUESTION 92
Which Cisco Unified Presence service parameter must be modified from the default value in order for presence and instant messaging to be functional?
A. server name
B. server IP address
C. DNS domain D. SIP proxy domain
E. enable presence
Correct Answer: D
QUESTION 93
On a Cisco IOS MGCP PRI gateway, what is the maximum configurable length of time for a scheduled switchback to a higher-priority Cisco Unified Communications Manager?
A. 6 hours
B. 12 hours
C. 18 hours
D. 24 hours
E. 48 hours
Correct Answer: D
QUESTION 94
What will occur if a video bridge is not available during a video call setup on Cisco Unified Communications Manager using the Intelligent Bridge Selection feature?
A. The video call will fail, and the caller will receive a busy tone.
B. The video call will succeed, and Cisco Unified Communications Manager will use the default video image.
C. The video call will fail and will be forwarded to voice mail.
D. The video call will fall back to an audio-only call.
E. The video call will fail, and the caller will hear a message.
Correct Answer: D
QUESTION 95
Your client has a business requirement that mandates exact DTMF durations being passed end-to- end across an H.323 VoIP infrastructure. Which two DTMF relay methods meet the client requirement? (Choose two.)
A. Cisco RTP
B. H.245 signal
C. H.245 alphanumeric
D. RTP-NTE
E. H.225 Notify
F. in-band voice
Correct Answer: CD
QUESTION 96
What is the default mailbox size that triggers disablement of sending and receiving voice messages for a Cisco Unity Connection user?
A. 2 MB
B. 4MB
C. 10 MB
D. 14 MB
E. 20 MB
Correct Answer: D QUESTION 97
Which of these statements correctly describes the logic for selecting MoH servers and MoH audio streams?
A. The audio stream and audio server used will be selected according to the configuration of the phone being placed on hold.
B. The audio stream and audio server used will be selected according to the configuration of the phone which is being used to place a caller on hold.
C. The audio stream will be selected according to the configuration of the phone which is being used to place a caller on hold, and the audio server used will be selected according to the configuration of the phone being placed on hold.
D. The audio stream will be selected according to the configuration of the phone being placed on hold and the audio server used will be selected according to the configuration of the phone which is being used to place a caller on hold.
Correct Answer: C
QUESTION 98
When a call is being established on a Cisco IOS MGCP gateway that is registered to Cisco Unified Communications Manager, which MGCP message is used by Cisco Unified Communications Manager to inform the gateway where to send RTP traffic?
A. MDCX
B. RTPX
C. CRCX
D. NTFY
E. RQNT
Correct Answer: A
QUESTION 99
Refer to the exhibit. When an inbound call with a calling number of 1001 and a called number of 2112 arrives at a Cisco IOS router with these dial peers, what is the correct order of dial-peer matching, from highest to lowest priority?
A. II,III, IV
B. II,IV, III,I
C. III,IV,II,I
D. III, II, IV,I
E. II, III, IV, I
Correct Answer: D QUESTION 100
CCIE WRITTEN v 3.0
Refer to the exhibit. The exhibit shows the T.30 message exchanges that resulted in a single page fax call failure. Which T.30 message sequence will result in a successful fax transmission?
A. PPS, EOP, PPR, PPS, EOP, NSF, DCN
B. MPS, EOP, PPR, PPS, EOP, MCF, DCN
C. PPS, EOP, RTP, PPS, EOP, NSF, DCN
D. PPS, EOP, PPR, PPS, EOP, MCF, DCN
E. PPS, EOP, NSF, DCN
Correct Answer: A QUESTION 101
On a Cisco IOS MGCP gateway with a voice ISDN PRI connection to the PSTN, which two PSTN signals are processed locally by the gateway? (Choose two.)
A. MGCP endpoint configuration
B. T1 framing and line code
C. ISDNQ.921
D. ISDNQ.931
E. ISDN call setup
Correct Answer: BC
QUESTION 102
A customer purchased 10,000 phone license units for a Cisco Unified Communications Manager cluster. How many phone license unit overdrafts are permitted in this Cisco Unified Communications Manager cluster?
A. 200
B. 500
C. 700
D. 1000
E. Phone license unit overdrafts are never permitted
Correct Answer: B
QUESTION 103
Which statement about MRGL on Cisco Unified Communications Manager is incorrect? (Choose three)
A. MRGL can be assigned to devices at the device level, device pool level, or both.
B. MRGL contains a prioritized list of Media Resource Groups.
C. Media resources that are not contained in any Media Resource Groups are not used by MRGL.
D. MRGL can contain a single Media Resource Group.
E. When a call is placed on hold, the MRGL of the device that put the call on hold determines which MOH server is used to play music to the held device.
Correct Answer: CDE
QUESTION 104
Which three services must be activated on Cisco Unified Presence in order for presence and instant messaging to be functional? (Choose three.)
A. Cisco Unified Presence SIP Proxy
B. Cisco AXL Web Service
C. Cisco Bulk Provisioning Service
D. Cisco Unified Presence Engine
E. Cisco Unified Presence Sync Agent
F. Cisco Serviceability Reporter
Correct Answer: ABD
QUESTION 105
Which statement about coder delay in a VoIP network is correct?
A. Coder delay is the time that is taken to fill a packet payload with encoded/compressed speech
B. Coder delay is also known as algorithmic delay.
C. Coder delay transforms a variable delay into a fixed delay.
D. Coder delay varies with the voice coder that is used and the processor speed.
E. Coder delay compensates for network switching delay.
Correct Answer: D QUESTION 106
When implementing a Cisco Unified Communications Manager solution over an MPLS WAN, which two rules must be observed to prevent overrunning the priority queue? (Choose two.)
A. RSVP will transparently pass application IDs from the customer network across the MPLS WAN.
B. The media streams must be the same size in both directions.
C. Only the connection to the MPLS WAN where the Cisco Unified Communications Manager resides must be enabled as a CE device.
D. The media has to be symmetrically routed.
E. If the CE is under corporate control, it may support either topology-aware or measurement-based CAC.
Correct Answer: BD QUESTION 107
An H.225 call setup arrives at Cisco Unified Communications Manager for a directory number on an IP phone that is engaged in an active conversation. If call waiting is disabled for this directory number and none of the Call Forward settings are defined, which H.225 disconnect reason code will be sent to the originating H.323 gateway?
A. No Route To Destination
B. Normal Call Clearing
C. Subscriber Absent
D. User Busy
E. Network Busy
Correct Answer: D QUESTION 108
Which three statements are correct with regard to the Certificate Trust List file? (Choose three.)
A. It is a list of devices and credentials that a phone should trust on the network.
B. It is signed using the administrator workstation password.
C. It contains identity, public key, and role information.
D. It is created by the CTL client on the administrator workstation.
Correct Answer: ACD QUESTION 109
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