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 connect directly to a standard telephone， fax machine， or sililar device and supplies ring， voltage， and dial tone
C.the FXS interface connect directly to an IP phone and supplies ring， voltage， and dial tone
D.the FXS interface connect directly to ISDN voice channels
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A.the Cisco WCS is designed to support 1500 Cisco WLAN controllers and up to 50 APs
B.the Cisco WCS runs on a dedicated network device such as the Cisco 2700 network appliance
C.the Cisco WCS runs on various windows and Linux platforms
D.the Cisco WCS screen displays four main menu sheet tab consisting of Monitor， Configure， Security， and Alam
E.the Cisco WCS uses the SNMP protocol to communicate with the controllers
A.Asynchronous Transfer Mode （ATM）
B.data-link switching （DLSw）
C.Route Processor Redundancy （RPR）
D.Frame Relay （FR）
E.Metro Ethernet
F.Multiprotocol Label Switching （MPLS）
A.a class can be identified as a single application， multiple applications with similar service needs，or be based on the source or destination IP address
B.a drawback of the DiffServ field in the MAC header to mark frames into behavior aggregates （BAs）
C.DiffServ uses the DiffServ field in the MAC header to mark frames into behavior
D.the DiffServ field occupies the same eight bits of the MAC header that were previously used for the ToS field
E.the first six high-order bits of the DiffServ field are used to identify the Resource Reservation Protocol （RSVP） value
F.the primary goal of DiffServ is scalability
A.FECN
B.LLQ
C.WRED
D.LFI
E.CRTP
F.CBWFQ
A.Cisco CallManager
B.Cisco CallManger Express （CME）
C.Cisco CallManager Gateway （CMG）
D.Cisco CallManager Voice Gateway （CMVG）
E.Media Gateway Control Protocol （MGCP）
A.increases link capacity
B.increases buffer space to accommodate bursts of traffic from delay-sensitive applications
C.provides prioritized forwarding for drop-sensitive applications
D.drop lower priority packets before congestion occurs
E.separates traffic into as many as 64 queues that can be uniquely prioritized
A.RTP multiplexing is used to keep multiple phone conversations separate
B.RTP provides end-to-end delivery services for voice traffic
C.UDP is used to ensure a reliable transmission from sender to receiver
D.RTP is used to provide resource reservation for the voice stream
E.UDP provides multiplexing
Refer to the wxhibit . what QOS model should be used to reserve the requested bandwidth and delay needed for each allowed VOIP call regardless of changing networkconditions？（）
A.best-effort delivery
B.ingress committed rate （ICR）
C.shaping and policing
D.egress committed rate （ECR）
E.integrated Services （IntServ）
F.differentiated services （DiffServ）
A.data plane
B.control plane
C.service plane
D.management plane
E.hyper plane
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
最新试题
Which two statements are true about Voice over IP （VoIP） packet delivery in a digital infrastructure？ （）
Which two QoS classification and marking statements are true？ （）
Which two commands should be entered on a WLAN controller to remove any residual configuration？（）
When QoS levels in the Cisco Wireless Control System （WCS） are entered， which profile names are used to identify the access categories？（）
Which two functions can be provided by an Integrated Services Router （ISR） in a VoIP network？（）
Which two statements are correct about the signaling methods that are utilized for transmitting voice？ （）
What are two reasons to implement H·323 gatekeepers？（）
Which three practices are important to the implementation of a DiffServ QoS architecture？（）
Which statement is true about the Call Admission Control （CAC） feature in VoIP networks？（）
Which of the items stated is typically the most expensive method of improving QoS across WAN links？（）