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QUESTION 41
Which two statements are requirements regarding hunt group options for B-ACD implementation on Cisco Unified Communications Manager Express routers? (Choose two.)

A.    The ephone hunt group is mandatory.
B.    Either the ephone hunt group or the voice hunt group is acceptable.
C.    Hunt group members must be SCCP IP phones.
D.    Hunt group members can include both SCCP or SIP IP phones.
E.    Hunt group members must be SIP IP phones.
F.    The member hunting mechanism must be set to sequential.

Answer: AC
Explanation:
The ephone hunt group is mandatory, and while ephone hunt groups only support Cisco Unified SCCP IP phones, a voice hunt group supports either a Cisco Unified SCCP IP phone or a Cisco Unified SIP IP phone
http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/command/reference/cme_v1ht.html

QUESTION 42
Which call hunt mechanism is only supported by the voice hunt group in a Cisco Unified Communications Manager Express router?

A.    sequential
B.    peer
C.    longest idle
D.    parallel
E.    overlay

Answer: D
Explanation:
Parallel Hunt-Group, allows a user to dial a pilot number that rings 2-10 different extensions simultaneously. The first extension to answer gets connected to the caller while all other extensions will stop ringing. A timeout value can be set whereas if none of the extensions answer before the timer expires, all the extensions will stop ringing and one final destination number will ring indefinitely instead. The final number could be another voice hunt-group pilot number or mailbox The following features are supported for Voice Hunt-Group:
Calls can be forwarded to Voice Hunt-Group
Calls can be transferred to Voice Hunt-Group
Member of Voice Hunt-Group can be SCCP, ds0-group, pri-group, FXS or SIP phone/trunk
Max member of Voice Hunt-Group will be 32

QUESTION 43
Which Cisco Unified Communications Manager Express ephone button configuration separator enables overflow lines when the primary line for an overlay button is occupied by an active call?

A.    o
B.    c
C.    w
D.    x
E.    :

Answer: D
Explanation:
x expansion/overflow, define additional expansion lines that are used when the primary line for an overlay button is occupied by an active call.

QUESTION 44
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.

Answer: BD

QUESTION 45
Refer to the exhibit. From this NFAS-enabled T1 PRI configuration on a Cisco IOS router, how many bearer channels are available to carry voice traffic?

A.    91
B.    92
C.    93
D.    94
E.    95

Answer: D
Explanation:
In NFAS one channel is used for signaling so according to this we will have 94 channel for with bearer capability.

QUESTION 46
Refer to the exhibit. Assuming this NFAS-enabled T1 PRI configuration on a Cisco IOS router is fully functional, what will the controller T1 1/1 D-channel status be in the output of the show isdn status command?

A.    MULTIPLE_FRAME_ESTABLISHED
B.    TEI_ASSIGNED
C.    AWAITING_ESTABLISHMENT
D.    STANDBY
E.    INITIALIZED

Answer: B
Explanation:
TEI_ASSIGNED, which indicates that the PRI does not exchange Layer 2 frames with the switch. Use the show controller t1 x command to first check the controller t1 circuit, and verify whether it is clean (that is, it has no errors) before you troubleshoot ISDN Layer 2 problem with the debug isdn q921.

QUESTION 47
Refer to the exhibit. In an effort to troubleshoot a caller ID delivery problem, a customer emailed you the voice port configuration on a Cisco IOS router. Which type of voice port is it?

A.    FXS
B.    E&M
C.    BRI
D.    FXO
E.    DID

Answer: D

QUESTION 48
The iLBC codec operates at 38 bytes per sample per 20-millisecond interval. What is its codec bit rate in kilobits per second?

A.    6.3
B.    13.3
C.    15.2
D.    16
E.    24

Answer: C
Explanation:
The internet Low Bit Rate Codec (iLBC) is designed for narrow band speech and results in a payload bit rate of 13.33 kbits per second for 30-millisecond (ms) frames and 15.20 kbits per second for 20 ms frames. When the codec operates at block lengths of 20 ms, it produces 304 bits per block, which is packetized as defined in RFC 3952. Similarly, for block lengths of 30 ms it produces 400 bits per block, which is packetized as defined in RFC 3952.The iLBC has built-in error correction functionality to provide better performance in networks with higher packet loss

QUESTION 49
Assume 6 bytes for the Layer 2 header, 1 byte for the end-of-frame flag, and a 40-millisecond voice payload, how much bandwidth should be allocated to the strict priority queue for five VoIP calls that use a G.729 codec over a multilink PPP link?

A.    87 kb/s
B.    134 kb/s
C.    102.6 kb/s
D.    77.6 kb/s
E.    71.3 kb/s

Answer: A
Explanation:
Voice payloads are encapsulated by RTP, then by UDP, then by IP. A Layer 2 header of the correct format is applied; the type obviously depends on the link technology in use by each router interface: A single voice call generates two one-way RTP/UDP/IP packet streams. UDP provides multiplexing and checksum capability; RTP provides payload identification, timestamps, and sequence numbering.

QUESTION 50
Assume 20 bytes of voice payload, 6 bytes for the Layer 2 header, 1 byte for the end-of-frame flag, and the IP, UDP, and RTP headers are compressed to 2 bytes, how much bandwidth should be allocated to the strict priority queue for six VoIP calls that use a G.729 codec over a multilink PPP link with cRTP enabled?

A.    80.4 kb/s
B.    91.2 kb/s
C.    78.4 kb/s
D.    69.6 kb/s
E.    62.4 kb/s

Answer: D
Explanation:
Voice payloads are encapsulated by RTP, then by UDP, then by IP. A Layer 2 header of the correct format is applied; the type obviously depends on the link technology in use by each router interface: A single voice call generates two one-way RTP/UDP/IP packet streams. UDP provides multiplexing and checksum capability; RTP provides payload identification, timestamps, and sequence numbering.

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QUESTION 31
Refer to the exhibit. Your junior design engineer presents this configuration design. What is the next-hop router for CE3, and why?

A.    CE1. BGP weight is higher than CE2.
B.    CE2. EBGP administrative distance is lower than RIP.
C.    CE2. The link between CE2 and PE1 has more bandwidth than CE1-to-PE1.
D.    CE1. HSRP on CE1 is in active state.

Answer: A

QUESTION 32
A service provider creates a network design that runs MPLS in its WAN backbone using OSPF as the IGP routing protocol. What would be two effects of additionally implementing MPLS-TE? (Choose two.)

A.    MPLS-TE is required to reroute traffic within less than 1 second in case of a link failure inside the
backbone.
B.    MPLS-TE is required to route different MPLS QoS service classes through different paths.
C.    MPLS-TE and OSPF cannot be used together inside one MPLS network.
D.    MPLS-TE cannot use OSPF for the traffic path calculation.
E.    MPLS-TE is required to create backup paths independently from the IGP.

Answer: BE

QUESTION 33
Which two mechanisms ensure that a network design provides fast path failure detection? (Choose two.)

A.    BFD
B.    fast hello packets
C.    UDLD
D.    IP Cisco Express Forwarding

Answer: AB

QUESTION 34
In which two ways is a network design improved by the inclusion of IP Event Dampening? (Choose two.)

A.    reduces processing load
B.    provides sub-second convergence
C.    improves network stability
D.    prevents routing loops
E.    quickly detects network failures

Answer: AC

QUESTION 35
You are evaluating convergence characteristics of various interior gateway protocols for a new network design. Which technology allows link-state routing protocols to calculate paths to destination prefixes that are functionally similar to feasible successors in Enhanced Interior Gateway Routing Protocol?

A.    Incremental Shortest Path First
B.    Cisco Multiprotocol Label Switching Traffic Engineering Fast Reroute
C.    Loop-Free Alternate Fast Reroute
D.    partial route calculation
E.    Fast-Flooding

Answer: C

QUESTION 36
You are hired to design a solution that will improve network availability for users on a campus network with routed access. If the budget limits you to three components, which three components would you recommend in your design proposal? (Choose three.)

A.    redundant power supplies in the access routers
B.    standby route processors for SSO in the core routers
C.    standby route processors for SSO in the distribution routers
D.    standby route processors for SSO in the access routers
E.    replace copper links between devices with fiber links

Answer: ADE

QUESTION 37
You are designing a network to support data, voice and video. Which two main factors will you address to improve network convergence? (Choose two.)

A.    event propagation delay
B.    failure detection delay
C.    forwarding engine update delay
D.    routing table recalculation delay

Answer: BD

QUESTION 38
Refer to the exhibit. This diagram depicts the design of a small network that will run EIGRP on R1 and R2, and EIGRP Stub on R3. In which two ways will this network be impacted if there is link instability between R1 and R2? (Choose two.)

A.    R1 will have routes in its routing table that originate from R2 and R3.
B.    R3 will have routes in its routing table that originate from R1 and R2.
C.    R2 will have routes in its routing table that originate from R1 and R3.
D.    R3 will be transit for traffic between R1 and R2.
E.    R3 will not be transit for traffic between R1 and R2.

Answer: BE

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