多項選擇題What are three factors used to determine the amount of bandwidth that is required for a single VoIP call?()

A.codec
B.link speed
C.Layer 2 encapsulation
D.packet overhead (IP/UDP/RTP)
E.link delay
F.total number of simultaneous calls that are allowed


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1.單項選擇題Which statement describes the distributed call control model in VoIP networks?()

A.The gateway voice-capable device is configured to support call control directly performing call setup, call maintenance, and call teardown
B.The gateway voice-capable device has a local call routing table configured through a routing protocol.
C.The gateway voice-capable device relies on a call agent to support call control.
D.The gateway voice-capable device relies on a gatekeeper to support call setup, call maintenance, and call teardown.

2.多項選擇題Which two pairings match the application with the correct Cos value?()

A.CoS 0 = Best-Effort Data
B.CoS 1 = Best-Effort Data
C.CoS 3 = High Priority
D.CoS 4 = High Priority Data
E.CoS 5 = Voice Bearer
F.CoS 7 = Voice Bearer

3.多項選擇題Which two options can be used as traffic descriptors when classifying and marking traffic? ()

A.incoming interface
B.Layer 2 differentiated services code point (DSCP)
C.Layer 3 IP precedence
D.outgoing interface

4.單項選擇題

What will the H.323 gateways do when they receive a call request?()

 

A.forward an admission request to the local gatekeeper
B.forward an admission request to the remote gatekeeper
C.send a location request to the remote gateway
D.send a location request to the remote gatekeeper

5.多項選擇題Which two statements about the implementation of WLAN QoS are true?()

A.The 802.11e standard is the IEEE 802.11 OoS WLAN standard.
B.The Wi-Fi Multimedia (WMM) standard decreases the eight priority levels to four access categories.
C.The Wi-Fi Multimedia (WMM) standard is a Wi-Fi Alliance standard that increases the four priority levels to eight access categories.
D.The Wi-Fi Multimedia (WMM) standard is an IEEE standard that increases the four priority levels to eight access categories.
E.Wireless 802.11 deploys Distributed Coordination Function (DCF), carrier sense multiple access with collision detection (CSMA/CD), interframe spacing, and random wait timers to avoid collisions.
F.Wireless OoS designs and implementations commonly use Layer 3 differentiated services code point (DSCP) or Layer 2 802.1 p to ensure priority

6.多項選擇題What are three traffic descriptors that are used by the classification process to categorize packets that require special OoS handling?()

A.Resource Reservation Protocol (RSVP)
B.IP precedence
C.traffic shaping
D.trust boundaries
E.DSCP
F.application

7.單項選擇題What management tool could be used to provide centralized configuration, monitoring, and management in a network built on Cisco wireless LAN controllers and Lightweight APs? ()

A.CiscoWorks Wireless LAN Solution Engine (WLSE)
B.CiscoWorks Wireless LAN Solution Engine (WLSE) Express
C.Cisco Wireless Control System (WCS)
D.Wireless Domain Services (WDS)
E.WLAN Controllers (WLC)

8.多項選擇題What are two reasons for packet loss on a VoIP connection?()

A.serialization delay
B.overrun
C.full buffers and queues
D.propagation delay
E.shaping delay
F.TCP header errors

9.單項選擇題Which statement is true about the components of a queuing mechanism?()

A.Each subinterface has its own hardware queue and can experience congestion just like its main interface
B.Hardware queuing is only used if the software queues are experiencing congestion.
C.Hardware queues and software queues are not used concurrently.
D.The hardware queuing system always uses the FIFO queuing mechanism.

10.多項選擇題Which two statements are true about the protocols that are used for transmitting voice traffic?()

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 of multiple phone conversations.

最新試題

In a VoIP network, which type of interface would an analog fax machine connect to?()

題型:單項選擇題

When QoS levels in the Cisco Wireless Control System (WCS) are entered, which profile names are used to identify the access categories?()

題型:單項選擇題

Which set of classes correctly identifies the four traffic classes, from highest priority to lowest priority, specified in the 802.11e standard?()

題型:單項選擇題

The Cisco SDM will create a QoS policy that provides services to two types of traffic. Which two statements indicate the default QoS parameters that are created by SDM?()

題型:多項選擇題

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? ()

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What are the three models of quality of service (QoS) in a network?()

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Which two characteristics are common between traffic policing and traffic shaping?()

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Which two statements about the Wi-Fi Multimedia (WMM) standard are true?()

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Which three user interfaces exist for the Cisco WLAN Controllers?()

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Within the WMM policy, how many default QoS radio access categories are there?()

題型:單項選擇題