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QUESTION 116
Which two VoIP capabilities are utilized when the CallManager and the gateway are configured for
Survivable Remote Site Telephony? (Choose two.)
A. Analog phones, connected to the PSTN, act as internal call agents if IP communication to the CallManager is lost.
B. An onsite gateway reroutes calls over the PSTN if IP communication to the CallManager is lost.
C. The IP phones can reroute calls over the PSTN if IP communication to the CallManager is lost.
D. Local voice gateways can assume the function of a call agent if IP communication to the CallManager is www-CareerCert-info lost.
E. IP phones use an internal call agent if IP communication to the CallManager is lost.
Correct Answer: BD Section: Q&A Explanation
QUESTION 117
Which two statements are correct about the signaling methods that are utilized for transmitting voice?
(Choose two.)
A. Channel-associated signaling transmits control signals in band and therefore reduces the bandwidth available for the voice data stream.
B. Channel-associated signaling utilizes a separate TDM channel for transmitting control signals.
C. Common channel signaling transmits control signals in band and therefore reduces the bandwidth available for the voice data stream.
D. Common channel signaling uses one of the TDM channels to transmit control information reducing the number of channels available for voice.
E. ISDN BRIs implement channel-associated signaling.
Correct Answer: AD Section: Q&A Explanation
QUESTION 118
Which two functions can be provided by an Integrated Services Router (ISR) in a VoIP network?
(Choose two.)
A. ISR can perform the functions of a multipoint control unit to facilitate voice conferencing.
B. ISR can perform the function of a call agent in the event of loss of communication with a CallManager.
C. ISR can provide XML applications to the phones.
D. ISR can provide all of the functionality of a CallManager in the event of loss of communication to the CallManager.
E. ISR can act as a voice gateway to the PSTN.
Correct Answer: BE Section: Q&A Explanation
QUESTION 119
Which three practices are important to the implementation of a DiffServ QoS architecture? (Choose
three.)
A. Because services are allocated throughout the network before the transmission of data begins, traffic classes can be guaranteed QoS services.
B. Traffic classes are marked with Layer 2 markings to allow for more granularity in identifying traffic classes.
C. Traffic classes are marked with Layer 3 markings to allow them to traverse different network types without loss of QoS information.
D. Traffic classes allow networks to provide proper QoS treatment of packets without applications having to request services.
E. Based upon the network capabilities, QoS markings are placed on packets as needed throughout the network to allow for proper QoS treatment of packets.
F. QoS markings are placed on packets as close to the network edge as possible to allow distribution and core devices to determine QoS actions as quickly as possible.
Correct Answer: CDF Section: Q&A Explanation
QUESTION 120
Refer to the exhibit. An IP packet, Ethernet frame, and MPLS frame are shown. Which two statements
are correct about the QoS marking relationships between them? (Choose two.)
A. A provider MPLS network will utilize IP precedence, CoS or EXP bits to provide QoS service through the provider network.
B. QoS markings from the Ethernet frame or IP packet will be mapped to MPLS EXP bits to allow for QoS service to be continued through a provider network.
C. MPLS mappings by the provider will change the IP ToS bits as a packet traverses an MPLS network.
D. Some networks require Ethernet CoS bits to be mapped to IP ToS bits because end devices can only mark at Layer 3.
E. Mapping CoS bits from the Ethernet frame to the IP ToS bits can be provisioned only at the edge of the provider network.
Correct Answer: BD Section: Q&A Explanation
Explanation/Reference:
QUESTION 121
In the design of a QoS solution, which two factors should be taken into consideration? (Choose two.)
A. On congested links, all forms of traffic will require some form of QoS.
B. All traffic types and requirements should be examined to determine the number of traffic classes required.
C. In the implementation of link efficiency mechanisms on links that typically transport relatively large packets, header compression will be most efficient.
D. In the implementation of link efficiency mechanisms on links that typically transport relatively small packets, header compression will be most efficient.
E. In the implementation of link efficiency mechanisms on links that typically transport relatively small packets, payload compression will be most efficient.
F. Payload compression provides more available bandwidth and reduces processing delay time.
Correct Answer: BD Section: Q&A Explanation
QUESTION 122
In a VoIP network, which type of interface would an analog fax machine connect to?
Select the best response.
A. Type 1
B. Type 2
C. FXS
D. FXO
E. E&M
Correct Answer: C Section: Q&A Explanation
QUESTION 123
Which set of steps represents the correct sequence a router would take when converting an analog www-CareerCert-info signal to a digital signal?
Select the best response.
A. Step 1: quantization Step 2: sampling Step 3: encoding
B. Step 1: sampling Step 2: encoding Step 3: quantization
C. Step 1: quantization Step 2: sampling Step 3: encoding
D. Step 1: sampling Step 2: quantization Step 3: encoding
Correct Answer: D Section: Q&A Explanation
QUESTION 124
Refer to the exhibit. This QoS policy will be applied outgoing on FastEthernet0/1 interface. Which one
of the following QoS classes is not enabled but will be listed in the configuration summary?
<img src=”642-845V8.09-53_21.jpg” width=”742″ height=”576″>
Select the best response.
A. SDMVoice-FastEthernet0/1
B. SDMSignal-FastEthernet0/1
C. SDMTrans-FastEthernet0/1
D. SDMManage-FastEthernet0/1
E. SDMRout-FastEthernet0/1 F. SDMBulk-FastEthernet0/1
Correct Answer: F Section: Q&A Explanation
QUESTION 125
Which Control Plane Policing (CoPP) statement is true? Select the best response.
A. Traffic to be policed is identified using the control-plane global configuration command.
B. The control-plane global configuration command enters the Cisco Modular QoS CLI (MQC) mode.
C. The control-plane global configuration command enters the control-plane configuration mode.
D. Traffic to be policed is identified using the control-plane interface configuration command.
E. The control-plane interface configuration command enters the Cisco Modular QoS CLI (MQC) mode.
F. The control-plane interface configuration command enters the control-plane configuration mode.
Correct Answer: C Section: Q&A Explanation
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