Which three Layer 2 access designs have all of their uplinks in an active state?（）

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• Which statement about data center access layer design modes is correct？（）

  A .  The access layer is the first oversubscription point in a data center design. B .  When using a Layer 2 loop-free design， VLANs are extended into the aggregation layer. C .  When using a Layer 2 looped design， VLANs are not extended into the aggregation layer. D .  When using a Layer 3 design， stateful services requiring Layer 2 connectivity are provisionedfrom the aggregation layer. E .  The data center access layer provides the physical-level connections to the server resourcesand only operates at Layer 3.

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• What can a network administrator utilize by using PPP Layer 2 encapsulation (Choose three.) （）。

  A . VLAN support B . compression C . authentication D . sliding windows E . multilink support F . quality of service

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• Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN (Choose three.)（）。

  A . HDLC B . Ethernet C . Token Ring D . PPP E . FDDI F . Frame Relay

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• During voice implementation，  which two required items are configured at an access layer switch connected to an IP phone to provide VoIP communication？（）

  A . allowed codecs B . native VLAN C . auxiliary VLAN D . Cisco Unified Communications Manager IP address E . RSTP

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• Which three statements accurately describe layer 2 Ethernet switches？（）

  A . Microsegmentation decreases the number of collisions on the network. B . if a switch receives a frame for an unkown destination，it uses ARP to resolve the address. C . Spanning Tree Protocol allows switches to automatically share vlan information. D . In a properly functioning network with redundant switched paths，each swiched aegment will contain oneroot bridge with all its ports in the forwarding state.All other switches in that broadcast domain will haveonly one root port. E . Establishing vlans increases the number of  broadcast domains. F . Switches that are configured with vlans make forwarding decisions based on both layer 2 and layer 3address information.

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• You are the network consultant from Cisco.com. Please point out which Layer 2 access designs does not support VLAN extensions?（）

  A . Flex Links B . loop-free U C . looped square D . looped triangle

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• Which three objectives would be met by designing Layer 3 switching in the Campus Backbone of a medium size installation?（）

  A . scale to a large size B . increase router peering C . provide a flexible topology with no spanning tree loops D . control broadcasts in the backbone

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• You are the Cisco Network Designer in Cisco.com. Which two statements about Layer 3 access designs are correct?（）

  A . Convergence time is fractionally slower than STP. B . Broadcast and fault domains are increased. C . IP address space is difficult to manage. D . Fast uplink convergence is supported for failover and fallback.

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• Which three of the protocols below belong to the application layer?（）

  A . ARP B . HTTPS C . SMTP D . CDP E . TFTP F . ICMP

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• What can a network administrator utilize by using PPP Layer 2 encapsulation? (Choose three.)（）

  A . VLAN support B . compression C . authentication D . sliding windows E . multilink support F . quality of service

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• Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN?（）

  A . HDLC B . Ethernet C . Token Ring D . PPP E . FDDI F . Frame Relay

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• If an enterprise customer required A switch for their branch office access layer, which family of switches would the customer likely choose from?（）

  A . Cisco SFS 3000/7000 B . Cisco Catalyst 2000 and 3000 C . Cisco Catalyst 4000 and 6000 D . Cisco Nexu

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• Which set of commands is recommended to prevent the use of a hub in the access layer?（）

  A . switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security maximum 1 B . switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security mac-address 1 C . switch(config-if)#switchport mode access switch(config-if)#switchport port-security maximum 1 D . switch(config-if)#switchport mode access switch(config-if)#switchport port-security mac-address 1

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

  A .  client antivirus software state B .  personal firewall settings C .  wireless cell bandwidth availability D .  IOS versions for routers and switches E .  appropriate client patch management level F .  appropriate QoS settings for client applicatio

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• Which three statements about classification marking of traffic at Layer 2 are true？ （）

  A . a Frame Relay header includes a 1-bit discard eligible （DE） bit to provide the class of service （CoS） B . an ATM header includes a 1-bit DE field to provide the CoS C . an MPLS EXP field is inserted in the Layer 3 IP precedence field to identify the CoS D . the CoS field only exists inside Ethernet frames when 802.1Q or Inter-Switch Link （ISL） trunking is used E . in the IEEE 802.1p standard， three bits are used to identify the user priority bits for the CoS F . in the IEEE 802.1q standard， six bits are used to identify the user priority bits for the CoS

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• Refer to the exhibit. At the end of an RSTP election process, which access layer switch port will assume the discarding role?（）https://assets.asklib.com/images/image2/2018072317314615527.jpg

  A . Switch3, port fa0/1 B . Switch3, port fa0/12 C . Switch4, port fa0/11 D . Switch4, port fa0/2 E . Switch3, port Gi0/1 F . Switch3, port Gi0/2

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• When you design QoS on CE for an MPLS Layer 2 VPN， which three things should be considered？（）

  A . Layer 2 access link QoS design B . enterprise-to-service-provider mapping models C . Layer 3 link access QoS design D . service provider service level agreements E . Layer 2 link access load balancing

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• Which three Layer 2 access designs have all of their uplinks in an active state？（）

  A . Flex Links B . loop-free U C . looped square D . looped triangle E . loop-free inverted U

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• The cluster IP address of the UCS Fabric interconnects is used to access which three entities? （）

  A . CMC B . CLI C . API D . VSM E . UI

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• Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN? (Choose three.)（）

  A . HDLC B . Ethernet C . Token Ring D . PPP E . FDDI F . Frame Relay

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

  A . client antivirus software state B . personal firewall settings C . wireless cell bandwidth availability D . IOS versions for routers and switches E . appropriate client patch management level F . appropriate QoS settings for client application Answer:

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• Which three statements accurately describe layer 2 Ethernet switches?（）

  A . Microsegmentation decreases the number of collisions on the network. B . if a switch receives a frame for an unkown destination,it uses ARP to resolve the address. C . Spanning Tree Protocol allows switches to automatically share vlan information. D . In a properly functioning network with redundant switched paths,each switched aegment will contain one root bridge with all its ports in the forwarding state.All other switches in that broadcast domain will have only one root port. E . Establishing vlans increases the number of broadcast domains. F . Switches that are configured with vlans make forwarding decisions based on both layer 2 and layer 3 address information.

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• If an enterprise customer required a switch for their branch office access layer, which family of switches would the customer likely choose from?（）

  A . Cisco Catalyst 2000 and 3000 B . Cisco Nexus C . Cisco Catalyst 4000 and 6000 D . Cisco SFS 3000/7000

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• Which buildings have three-layer terrace?

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