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Following questions and answers are all new published by Cisco Official Exam Center: http://www.lead2pass.com/640-878.html
What layer of the IP NGN Model does the Customer Element and the Carrier Ethernet exist?
A. Service Layer
B. Network Layer
C. Application Layer
D. Operational Layer
Which number range is allocated to private Autonomous Systems by the Internet Assigned Numbers Authority?
A. 65535 to 65545
B. 64535 to 64536
C. 64512 to 65535
D. 65535 to 66001
E. 63512 to 64535
Which of the following commands would be used to prevent a switchport from processing Bridge Protocol Data Units?
A. switch(config)#bpdu filter enable
B. switch(config)#no bpdu enable
C. switch(config-if)#spanning-tree bpdufilter enable
D. switch(config-if)#no spanning-tree bpdu filter enable
E. switch(config-if)#spanning-tree bpdu guard
Which commands will configure the spanning tree operating mode that can group multiple VLANs in a single domain?
A. switch(config)#spanning-tree mode pvst
B. switch(config)#spanning-tree mode rstp
C. switch(config)#spanning-tree mode rapid-pvst
D. switch(config)#spanning-tree mode mst
E. switch(config)#spanning-tree mode mst-plus
A customer has created a new VLAN for the subnet that was allocated to them. Computers on the subnets can ping their default gateway, but they cannot ping devices in the other subnet. What is most likely the problem?
A. Firewall on the Provider Edge is blocking access
B. InterVLAN routing is not configured
C. BGP has not been configured with the Provider Edge router
D. VLAN Switched Virtual Interface is in a down state
Which command configures a switchport to connect only a host device in VLAN 301?
A. switchport access vlan 301
B. switchport mode trunk vlan 301
C. switchport mode access vlan 301
D. switchport vlan 301
Which two commands are required to configure an access port for both voice VLAN 20 and data VLAN 30? (Choose two.)
A. switchport mode access 30
B. switchport data vlan 30
C. switchport access data 20
D. switchport access data 30
E. switchport access vlan 30
F. switchport mode voice 20
G. switchport voice vlan 20
Refer to the exhibit. Which three commands are required on interface fastethernet 5/6 in order to create a trunk link between another Cisco Catalyst Switch? (Choose three.)
A. no shutdown
B. switchport mode trunk
C. encapsulation trunk
D. switchport trunk encapsulation dot1Q
E. switchport trunk enable
F. no switchport
G. interface fastethernet 5/6 trunk
H. switchport trunk allow dot1Q
A customer has been allocated a new VLAN on a new Layer 3 switch. After configuring the Switched Virtual Interface, what additional two configurations are required to ensure the switch can route packets to the Internet through a gateway with IP address of 220.127.116.11? (Choose two.)
A. IP default-gateway 18.104.22.168
B. IP routing
C. IP route 0.0.0.0 0.0.0.0 22.214.171.124
D. IP routing 0.0.0.0 0.0.0.0 126.96.36.199
E. IP networking
Refer to the partial Cisco IOS-XR configuration. What is the purpose of the for PFX to PEER command?
for PFX to PEER
A. To selectively enable LDP peering(s) with specific neighbors
B. To selectively disable LDP peering(s) with specific neighbors
C. To perform outbound filtering for local label advertisement for one or more prefixes to one or
D. To perform inbound filtering for local label advertisement for one or more prefixes from one or
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640-878 new questions on Google Drive: https://drive.google.com/open?id=0B3Syig5i8gpDaXpIV25OZHQtMkE
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