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
What are three factors used to determine the amount of bandwidth that is required for a single VoIP call？ （）
Which two statements are true about Voice over IP （VoIP） packet delivery in a digital infrastructure？ （）
In the design of a QoS solution， which two factors should be taken into consideration？（）
When QoS levels in the Cisco Wireless Control System （WCS） are entered， which profile names are used to identify the access categories？（）
What is an advantage of the IntServ QoS model？（）
What are two reasons to implement H·323 gatekeepers？（）
Which two commands should be entered on a WLAN controller to remove any residual configuration？（）
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？（）
Which two characteristics are common between traffic policing and traffic shaping？（）
Within the WMM policy， how many default QoS radio access categories are there？（）