A.propagation delay
B.voice packet serialization delay
C.congested egress queues
D.header overhead
E.packets dropped because of CRC errors
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A.Calls to the PSTN can be made via the use of FXO or T1/E1 trunk ports.
B.Calls to the PSTN can be made via FXS or T1/E1 trunk ports.
C.Analog and IP phones can be connected to the VoIP network via FXO or T1/E1 trunk ports.
D.Calls between analog phones that are attached to the FXS ports in a VoIP network can be completely processed by voice-enabled routers.
A.The FXS interface allows an analog connection to be directed at the public switched telephone network （PSTN’s） central office.
B.The FXS interface connects directly to a standard telephone，fax machine，or similar device and supplies ring，voltage，and dial tone.
C.The FXS interface connects directly to an IP phone and supplies ring，voltage，and dial tone.
D.The FXS interface connects directly to ISDN voice channels.
A.Standard encoding techniques create an uncompressed digital data rate of 4000 bps.
B.Standard encoding techniques create an uncompressed digital data rate of 8000 bps.
C.Standard encoding techniques create an uncompressed digital data rate of 64，000 bps.
D.Voice quality is not a concern if compression is not used.
E.Two methods of quantization are linear and logarithmic.
F.Two methods of compression are u-law and a-law.
A.The three required steps in the analog to digital conversion are sampling，encoding，and compression.
B.The three required steps in the analog to digital conversion are sampling，quantization，and compression.
C.The three required steps in the analog to digital conversion are sampling，quantization，and encoding.
D.The output of the sampling process is a pulse code modulation （PCM） signal.
E.The output of the sampling process is a pulse amplitude modulation （PAM） signal.
A.Cisco AutoQoS can be used repeatedly to apply a single QoS policy to multiple interfaces.
B.Cisco AutoQoS includes an optional web-based GUI for automating the configuration of QoS services.
C.Cisco AutoQoS provides capabilities to automate VoIP deployments.
D.The auto qos global configuration command is used to configure Cisco AutoQoS.
E.The Modular QoS CLI （MQC） is the best way to fine tune QoS configurations.
F.The SDM QoS wizard is the fastest way to implement QoS.
最新試題
Which statement is true about the Call Admission Control （CAC） feature in VoIP networks？（）
For delay sensitive traffic， what are the three best ways that are used to prevent packet loss？ （）
What can be used to maintain the voice quality on a link by limiting the number of calls that can be active at any given time？（）
In the design of a QoS solution， which two factors should be taken into consideration？（）
What is an advantage of the IntServ QoS model？（）
What are the three models of quality of service （QoS） in a network？（）
Which Control Plane Policing （CoPP） statement is true？（）
When Cisco SDM is used to generate QoS policy， various QoS classes will be created and assigned a percentage of the interface bandwidth. Which three statements indicate the default bandwidth values that are assigned by SDM for outgoing traffic on a WAN interface？ （）
Which set of classes correctly identifies the four traffic classes， from highest priority to lowest priority， specified in the 802.11e standard？（）
SDM creates a low latency queuing （LLQ） service policy with its associated classes. What are the two types of low latency queuing available using the SDM QoS wizard？（）