When a router converts analog signals to digital signals， what three steps are always included in the process？ （）

单项选择题Whichstatementistrueaboutthecomparisonofvoicetrafficwithvideotraffic？（）

A. Video conferencing traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows.
B. Latency requirements are less stringent for video traffic than for voice traffic.
C. Video traffic is less sensitive to dropped packets than for voice traffic.
D. Video traffic requires the retransmission capabilities of TCP whereas voice uses UDP.
E. Voice traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows.
F. Voice traffic requires the retransmission capabilities of TCP whereas video uses UDP.

多项选择题WhataretwostepsneededtodefineaQoSpolicyforatrafficclass？（）

A. Determine a minimum bandwidth guarantee.
B. Determine interfaces to which to apply policy.
C. Assign priorities to the class.
D. Configure access control lists.

多项选择题WhatarethreeconsiderationswhenchoosingtheQoSmodeltodeployinanetwork？（）

A. the routing protocols being utilized in the network
B. the applications utilizing the network
C. the traffic destinations
D. network addressing scheme
E. cost of implementation
F. the amount of the control needed of the resources

多项选择题WhichthreestatementsaretrueabouttheapplicationofQoSmodels？（）

A. The DiffServ model requires applications to signal the network with QoS requirements.
B. The DiffServ model can be used to deliver QoS based upon IP precedence， or source and destination addresses.
C. The DiffServ model requires RSVP.
D. The best effort model is suitable for applications such as file transfer and e-mail
E. The IntServ model requires applications to signal the network with QoS requirements.
F. The IntServ model attempts to deliver a level of service based on the QoS specified by each packet

多项选择题WhichtwostatementsabouttheWirelessLocationAppliancearetrue？（）

A. A Wireless Location Appliance acts as a server to one or more Cisco WCSs. It collects， stores， and passes on data from its associated Cisco WLAN controllers.
B. Before using the Web interface， the initial configuration of the Wireless Location appliance must be done using the command-line interface （CLI）.
C. The Cisco 2000， 2700， 4100， and 4400 are examples of Wireless Location Appliances.
D. The Wireless Location Appliance visually displays the location information of WLAN devices and forwards this information to third-party applications using the Simple Network Management Protocol （SNMP）.
E. The Wireless Location Appliance visually tracks up to 15，000 WLAN devices and can store this information for 90 days.