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單項(xiàng)選擇題VLAN Tagging， also known as Frame Tagging， is a method developed by Cisco to help identify packets travelling through trunk links. When an Ethernet frame traverses a trunk link， a special VLAN tag is added to the frame and sent across the trunk link .How does ERS use the VLAN tag？（）

A. provide service internetworking
B. support transparency for Layer 2 frames
C. indicate destination as a connection identifier
D. map to the DLCI in service internetworking

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你可能感興趣的試題

1.單項(xiàng)選擇題Which of these statements best describes VPLS？（）

A. Neither broadcast nor multicast traffic is ever flooded in VPLS.
B. Multicast traffic is flooded but broadcast traffic is not flooded in VPLS.
C. VPLS emulates an Ethernet switch， with each EMS being analogous to a VLAN.
D. Because U-PE devices act as IEEE 802.1 devices， the VPLS core must use STP.
E. When the provider experiences an outage， IP re-routing restores PW connectivity and MAC re-learning is needed.

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2.多項(xiàng)選擇題Which two benefits does VoFR provide？（）

A. bandwidth efficiency
B. cell-switching
C. congestion notification
D. heterogeneous network

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3.單項(xiàng)選擇題A Fibre Channel fabric （or Fibre Channel switched fabric， FC-SW） is a switched fabric of FibreChannel devices enabled by a Fibre Channel switch. Fabrics are normally subdivided by Fibre Channel zoning. Each fabric has a name server and provides other services. Higher redundancy over FC-AL，P2P.Which path selection protocol is used by Fibre Channel fabrics？（）

A. OSPF
B. RIP
C. FSPF
D. VSANs

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4.單項(xiàng)選擇題The network administrator would like to generate synthetic traffic using the Service AssuranceAgent contained in Cisco IOS. Which CiscoWorks network management application will be used toreport the latency and availability for configured traffic operations on an end-to-end and hop-by-hop （router-to-router） basis？（）

A. nGenius Real-Time Monitor
B. CiscoView
C. Device Fault Manager
D. Internetwork Performance Monitor

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5.單項(xiàng)選擇題You are the Cisco Network Designer in Cisco.com. In your company site， a NAS is both physicall yand logically in the traffic path. The NAS identifies clients solely based on their MAC addresses. Inwhich access mode has this NAS been configured to operate？（）

A. Layer 2 mode
B. Layer 2 Edge mode
C. Layer 3 mode
D. Layer 3 In-Band mode

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6.單項(xiàng)選擇題Which IP telephony deployment model uses an H.225 Gatekeeper-Controlled trunk for calladmission control within existing H.323 environments？（）

A. single site with centralized call processing
B. single site with distributed call processing
C. multisite with centralized call processing
D. multisite with distributed call processing

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7.多項(xiàng)選擇題Which two settings must be configured in order to use the GUI to configure Call Admission Controlwith voice applications？（）

A. QoS must be set to Platinum
B. WMM must be enabled
C. QoS must be set to Gold
D. TSPEC must be disabled
E. Cisco Compatible Extensions must be disabled

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8.多項(xiàng)選擇題When designing a converged network， which measures can be taken at the building access layerto help eliminate latency and ensure end-to-end quality of service can be maintained？（）

A. rate limit voice traffic
B. configure spanning-tree for fast link convergence
C. isolate voice traffic on separate VLANs
D. classify and mark traffic close to the source

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9.單項(xiàng)選擇題As an experienced technician， you are responsible for infrastructure design and globalconfiguration changes. You are asked to deploy a Voice over Wireless LAN for your company. Ifthe cells have the same channel， the separation between them should be（）

A. 19dbm
B. 10dbm
C. 67dbm
D. 86dbm

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10.多項(xiàng)選擇題What are disadvantages to storage directly attached to the application servers？（）

A. reliability
B. scalability
C. redundancy
D. manageability

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