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Vendor: Cisco
Certifications: CCIE
Exam Name: CCIE Collaboration
Exam Code: 400-051
Total Questions: 615 Q&As
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Cisco CCIE 400-051 Dumps Exam Practice Questions And Answers (Q1-Q10)
QUESTION 1
Refer to the exhibit.
Which option describes how this Cisco IOS SIP gateway, with an analog phone attached to its FXS port, handles an incoming informational SIP 180 response message without SDP?
A. It will enable early media cut-through.
B. It will generate local ring back.
C. It will do nothing because the message is informational.
D. It will terminate the call because this is an unsupported message format.
E. It will take the FXS port offhook.
Correct Answer: B
Explanation:
The Session Initiation Protocol (SIP) feature allows you to specify whether 180 messages with Session Description Protocol (SDP) are handled in the same way as 183 responses with SDP. The 180 Ringing message is a provisional or informational response used to indicate that the INVITE message has been received by the user agent and that alerting is taking place. The 183 Session Progress response indicates that information about the call state is present in the message body media information. Both 180 and 183 messages may contain SDP, which allows an early media session to be established prior to the call being answered.
Prior to this feature, Cisco gateways handled a 180 Ringing response with SDP in the same manner as a 183 Session Progress response; that is, the SDP was assumed to be an indication that the far end would send early media. Cisco gateways handled a 180 response without SDP by providing local ringback, rather than early media cut-through. This feature provides the capability to ignore the presence or absence of SDP in 180 messages, and as a result, treat all 180 messages in a uniform manner. The SIP–Enhanced 180 Provisional Response Handling feature allows you to specify which call treatment, early media or local ringback, is provided for 180 responses with SDP.
QUESTION 2
Refer to the exhibit.
Which number is sent as the caller ID when a user at extension 5001 places a call that matches this translation profile?
A. 14087775001
B. +4087775001
C. 4087750001
D. +14087775001
Correct Answer: D
Explanation:
When someone dials 5001, it will match rule 2 because it exactly starts with 5(five) using the ^ sign and ends with [0-9] followed by $. In replace pattern you can see +1408777 & \0 means all set of match pattern. Thus, +14087775001.
QUESTION 3
Which Cisco IOS multipoint video conferencing profile is also known as best-effort video on the Cisco Integrated Router Generation 2 with packet voice and video digital signal processor 3?
A. homogeneous
B. guaranteed-audio
C. rendezvous
D. heterogeneous
E. flex mode video
Correct Answer: B
Explanation:
Three types of video profiles are supported: homogeneous conferences (video switching), heterogeneous conferences (video mixing), and guaranteed audio conferences (best-effort video).
As the name suggests, when Guaranteed Audio Conferences is configured, the system attempts to display video for all participants; however, it does not guarantee that the video of all participants is displayed. For those participants whose video is not displayed, participants are downgraded to audio-only and the profile guarantees preservation of the audio portion of the call. This option gives you added flexibility because the DSPs are not all reserved when the profile is created; the system attempts to reserve them when this profile is activated with an actual conference. For example:
dspfarm profile 1 conference video guaranteed-audio codec h264 vga codec h264 4cif
QUESTION 4
Refer to the exhibit.
IP phone 1 has MAC address of 1111.1111.1111, and IP phone 2 has MAC address of 2222.2222.2222. The first two incoming calls rang both phones and were answered by IP phone 2.
Which option describes what will happen to the third incoming call?
A. Both phones ring, but only IP phone 1 can answer the call.
B. Both phones ring and either phone can answer the call.
C. Only IP phone 1 rings and can answer the call.
D. Neither phone rings and the call is forwarded to 2100.
E. Neither phone rings and the call is forwarded to 2200.
Correct Answer: C
Explanation:
As we can see busy-trigger-per-button set to 2 in voice register pool 1(IP Phone 1). So, IP Phone 1’s channel is free for receiving incoming calls and right now IP Phone 2 is busy answering call.
QUESTION 5
Which SIP message element is mapped to QSIG FACILITY messages being tunneled across a SIP trunk between two Cisco IOS gateways? 400-051 dumps
A. SIP UPDATE
B. SIP OPTIONS
C. SIP SUBSCRIBE
D. SIP INFO
E. SIP NOTIFY
Correct Answer: D
Explanation:
Mapping of QSIG Message Elements to SIP Message Elements
This section lists QSIG message elements and their associated SIP message elements when QSIG messages are tunneled over a SIP trunk.
•
QSIG FACILITY/NOTIFY/INFO
<—>
SIP INFO
•
QSIG SETUP
<—>
SIP INVITE
•
QSIG ALERTING
<—>
SIP 180 RINGING
•
QSIG PROGRESS
<—>
SIP 183 PROGRESS
•
QSIG CONNECT
<—>
SIP 200 OK
•
<—>
SIP BYE/CANCEL/4xx—6xx Response
QUESTION 6
Which two types of line codes are configurable for an E1 PRI controller on a Cisco IOS router? (Choose two.)
A. CRC4
B. AMI
C. B8ZS
D. HDB3
E. ESF
F. SF
Correct Answer: BD
Explanation:
Configuring an NM-xCE1T1-PRI Card for an E1 Interface Perform this task to select and configure an NM-xCE1T1-PRI network module card as E1.
SUMMARY STEPS
1. enable
2. configure terminal
3. card type e1 slot
4. controller e1 slot / port
5. linecode {ami | hdb3}
6. framing {crc4 | no-crc4}
QUESTION 7
Which two statements describe characteristics of Cisco Unified Border Element high availability, prior to Cisco IOS release 15.2.3T, using a box-to-box redundancy configuration? (Choose two.)
A. It leverages HSRP for router redundancy and GLBP for load sharing between a pair of routers.
B. Cisco Unified Border Element session information is check-pointed across the active and standby router pair.
C. It supports media and signal preservation when a switchover occurs.
D. Only media streams are preserved when a switchover occurs.
E. It can leverage either HSRP or VRRP for router redundancy.
F. The SIP media signal must be bound to the loopback interface.
Correct Answer: BD
Explanation:
Configure box-to-box redundancy when you:
• Expect the behavior of the CSSs to be active/standby (only the master CSS processes flows)
• Can configure a dedicated Fast Ethernet (FE) link between the CSSs for the VRRP heartbeat
Do not configure box-to-box redundancy when you:
• Expect the behavior of the CSSs to be active-active (both CSSs processing flows). Use VIP redundancy instead.
• Cannot configure a dedicated FE link between the CSSs.
• Require the connection of a Layer 2 device between the redundant CSS peers
QUESTION 8
IP phone 1 has MAC address of 1111.1111.1111, and IP phone 2 has MAC address of 2222.2222.2222. The first two incoming calls were answered by IP phone 1, and the third incoming call was answered by IP phone 2.
Which option describes what will happen to the fourth incoming call?
A. Both phones ring, but only IP phone 2 can answer the call.
B. Both phones ring and either phone can answer the call.
C. Both phones ring, but only IP phone 1 can answer the call.
D. Neither phone rings and the call is forwarded to 2100.
E. Neither phone rings and the call is forwarded to 2200.
Correct Answer: D
Explanation:
IP Phone 1 & 2 both have busy-trigger-per-button configured to 3 & 2 respectively. So, the 4th incoming call will get forwarded to 2100 as busy-triggers are exceeding in IP Phones.
QUESTION 9
Which statement describes the question mark wildcard character in a SIP trigger that is configured on Cisco Unity Express?
A. It matches any single digit in the range 0 through 9.
B. It matches one or more digits in the range 0 through 9.
C. It matches zero or more occurrences of the preceding digit or wildcard value.
D. It matches one or more occurrences of the preceding digit or wildcard value.
E. It matches any single digit in the range 0 through 9, when used within square brackets.
Correct Answer: C
Explanation:
Table 5-2 Trigger Pattern Wildcards and Special Characters
Character
Description
Examples
X
The X wildcard matches any single digit in the range 0 through 9.
The trigger pattern 9XXX matches all numbers in the range 9000 through 9999.
!
The exclamation point (!) wildcard matches one or more digits in the range 0 through 9.
The trigger pattern 91! matches all numbers in the range 910 through
91999999999999999999999999999999.
?
The question mark (?) wildcard matches zero or more occurrences of the preceding digit or wildcard value.
The trigger pattern 91X? matches all numbers in the range 91 through
91999999999999999999999999999999.
+
The plus sign (+) wildcard matches one or more occurrences of the preceding digit or wildcard value.
The trigger pattern 91X+ matches all numbers in the range 910 through
91999999999999999999999999999999.
[ ]
The square bracket ([ ]) characters enclose a range of values.
The trigger pattern 813510[012345] matches all numbers in the range 8135100 through 8135105.
–
The hyphen (-) character, used with the square brackets, denotes a range of values.
The trigger pattern 813510[0-5] matches all numbers in the range 8135100 through 8135105.
^
The circumflex (^) character, used with the square brackets, negates a range of values.
Ensure that it is the first character following the opening bracket ([).
Each trigger pattern can have only one ^ character.
The trigger pattern 813510[^0-5] matches all numbers in the range 8135106
QUESTION 10
Which statement about a virtual SNR DN-configured Cisco Unified Communications Manager Express-enabled Cisco IOS router is true?
A. Virtual SNR DN supports either SCCP or SIP IP phone DNs.
B. A virtual SNR DN is a DN that is associated with multiple registered IP phones.
C. Calls in progress can be pulled back from the phone that is associated with the virtual SNR DN.
D. The SNR feature can only be invoked if the virtual SNR DN is associated with at least one registered IP phone.
E. A call that arrived before a virtual SNR DN is associated with a registered phone, and still exists after association is made, but cannot be answered from the phone.
Correct Answer: E
Explanation:
Virtual SNR DN only supports Cisco Unified SCCP IP phone DNs.
Virtual SNR DN provides no mid-call support.
Mid-calls are either of the following:
– Calls that arrive before the DN is associated with a registered phone and is still present after the DN is associated with the phone. 400-051 dumps
– Calls that arrive for a registered DN that changes state from registered to virtual and back to registered.
Mid-calls cannot be pulled back, answered, or terminated from the phone associated with the DN.
State of the virtual DN transitions from ringing to hold or remains on hold as a registered DN.
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