單項(xiàng)選擇題How does ERS use the VLAN tag?()

A. to provide service internetworking
B. to support transparency for Layer 2 frames
C. as a connection identifier to indicate destination
D. as a mapping to the DLCI in service internetworking
E. to provide a trunk by which all VLANs can navigate from one site to one or multiple sites


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1.單項(xiàng)選擇題Your MPLS implementation is currently using internal backdoor links. What can you do to minimize the impact of having these links?()

A. use BGP as the CE-PE routing protocol
B. use OSPF as the CE-PE routing protocol
C. use EIGRP as the CE-PE routing protocol
D. use the SP to redistribute routes as external routes for OSPF and EIGRP
E. use route redistribution at each location to ensure external routes are imported into the IGP

2.多項(xiàng)選擇題Which two of these are characteristics of MPLS VPNs?()

A. Layer 3 MPLS VPNs can forward only IP packets
B. Layer 2 MPLS VPNs can forward any network protocol
C. MPLS label paths are automatically formed based on Layer 2 frames
D. Layer 3 MPLS VPNs can forward any network protocol based on Layer 2 frames
E. In Layer 2 MPLS VPNS, the service provider controls the customer Layer 3 policies

4.多項(xiàng)選擇題Which two of these are characteristics of Metro Ethernet? ()

A. class of service
B. bandwidth profiles
C. user-network interface
D. Ethernet LAN circuit attributes
E. Ethernet virtual circuit attributes

5.多項(xiàng)選擇題Which two of these Metro Internet services map to E-LAN services that are defined by the MEF?()

A. Ethernet Private Line
B. Ethernet Wire Service
C. Ethernet Relay Service
D. Ethernet Multipoint Service
E. Ethernet Relay Multipoint Service

6.多項(xiàng)選擇題Which three of these Metro Ethernet services map to E-Line services that are defined by the MEF?()

A. Ethernet Private Line
B. Ethernet Wire Service
C. Ethernet Relay Service
D. Ethernet Multipoint Service
E. Ethernet Relay Multipoint Service

7.單項(xiàng)選擇題What is the recommended practice regarding UDLD when implementing it in all fiber-optic LAN ports?()

A. Adjust the default hello timers to three seconds for aggressive mode.
B. Enable it in global mode and on every interface you need to support.
C. Enable it in global mode to support every individual fiber-optic interface.
D. Enable it to create channels containing up to eight parallel links between switches.
E. Enable it in global mode to support every individual fiber optic and Ethernet interface.

8.多項(xiàng)選擇題Which two of these are recommended practices with trunks? ()

A. use ISL encapsulation
B. use 802.1q encapsulation
C. set ISL to desirable and auto with encapsulation negotiate to support ILS protocol negotiation
D. use VTP server mode to support dynamic propagation of VLAN information across the network
E. set DTP to desirable and desirable with encapsulation negotiate to support DTP protocol negotiation.

9.單項(xiàng)選擇題Why is STP required when VLANs span access layer switches?()

A. to ensure a loop-free topology
B. to protect against user-side loops
C. in order to support business applications
D. because of the risk of lost connectivity without STP
E. for the most deterministic and highly available network topology

10.單項(xiàng)選擇題When is a first-hop redundancy protocol needed in the distribution layer?()

A. when HSRP is not supported by the design
B. when multiple vendor devices need to be supported
C. when preempt tuning of the default gateway is needed
D. when a robust method of backing up the default gateway is needed
E. when the design implements Layer 2 between the access switch and the distribution switch
F. when the design implements Layer 3 between the access switch and the distribution switch

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The Cisco NAC Appliance is able to check which three items before allowing network access?()

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What is the term for a logical SAN which provides isolation among devices physically connected to the same fabric?()

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As an experienced technician, you are responsible for infrastructure design and global configuration changes. You are asked to deploy a Voice over Wireless LAN for your company. If the cells have the same channel, the separation between them should be:()

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How many channels are defined in the IEEE 802.11b DSSS channel set?()

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