多項選擇題Which two Cisco AutoQoS configuration statements are true? ()

A.the auto discovery qos command is supported on serial interfaces, subinterfaces, and virtual interfaces
B.CEF must be enabled before configuring the auto discovery qos command
C.the auto discovery qos privilege EXEC command must be configured on a router for several days to collect a sampling of data traffic
D.the auto qos trust command relies on NBAR to provide VoIP classification
E.the auto qos voip command configures the voip classification on routers and switches


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2.多項選擇題What two steps need to be taken in deploying AutoQoS for enterprise on routers?()

A.provide visibility into the classes of service deployed using system logging and SNMP traps
B.determine WAN settings for fragmentation, compression, encapsulation, and Frame Relay-ATM interworking
C.enable the AutoQoS VoIP for voice traffic
D.generate and deploy MQC-based QoS policies
E.profile the traffic with Auto-Discovery

3.單項選擇題A branch office of Acme Insurance has 15 IP phones connected to the main office using the distributed call processing model. Normally, the phones work with great quality. However, during very busy times when all of the agents are on the phone at the same time, the voice quality drops precipitously. Words or phrases or both are dropped from conversations. What is the most likely cause of the problem?()

A.large files are being downloaded over the WAN network
B.IP phone traffic is not being classified correctly
C.more bandwidth is required for the office LAN
D.Call Admission Control has not been implemented 
E.employees are watching videos over the internet
F.header compression is not being used

4.多項選擇題Which two QoS statements are true about the use of the SDMQoS wizard?()

A.business-critical traffic includes VoIP and voice signaling packets
B.SDM can be used to configure a basic QoS policy for incoming traffic on WAN interfaces andIPsec tunnels
C.SDM can provide QoS for real-time traffic and business-critical traffic
D.SDM creates a custom-queuing (CQ) or a priority-queuing (PQ) policy
E.SDM creates a low latency queuing (LLQ) service policy with its associated classes
F.when allocating bandwidth, values can be entered in either bandwidth percentage or kilobytes per second (kBps)

5.多項選擇題Which two features are supported by the WLAN Solution Engine (WLSE)?()

A.configuration of APs
B.auto discovery of rogue APs
C.reporting
D.WLSE in two versions: base and location
E.graphical view of multiple controllers and managed APs

6.多項選擇題Which three traffic descriptors are typically used as QoS markings for packets or frames entering the network?()

A.protocol type
B.CoS
C.DSCP
D.IP precedence
E.destination address
F.input interface

7.單項選擇題What is true about Quality of Service (QoS) for VPNs?()

A.QoS preclassification is only supported on generic routing encapsulation (GRE) and IPsec VPNs
B.QoS preclassification is not required in Layer 2 Tunneling Protocol (L2TP), Layer2 Forwarding (L2F), and Point-to-Point Tunneling Protocol (PPTP) VPNs
C.QoS preclassification is supported on IPsec AH VPNs, but not on IPsec ESP VPNs
D.the QoS-for-VPNs feature (QoS preclassification) is designed for VPN transport interfaces
E.with IPsec tunnel mode, the type of service (ToS) byte value is copied automatically from the original IP header to the tunnel header

8.多項選擇題What are three types of packet delays that occur in a network? ()

A.timing
B.queuing
C.differential
D.serialization
E.packetization
F.propagation

9.多項選擇題Which three statements are true about the data traffic characteristics of voice traffic? ()

A.latency must be kept below 150 ms
B.latency is not a concern as long as jitter is kept below 30 ms
C.voice packets do not require a specific type of queuing
D.voice packets are rather small
E.voice packets require TCP for rapid retransmission of dropped packets
F.voice packets require a fairly constant bandwidth reserved for voice control traffic as well as forthe voice payload

10.多項選擇題What are two QoS mechanisms that are used to prevent packet loss?()

A.header compression
B.payload compression
C.low latency queuing (LLQ)
D.weighted random early detection (WRED)
E.traffic policing
F.traffic shaping