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Exam Code: 642-889
Exam Name: Implementing Cisco Service Provider Next-Generation Egde Network Services
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642-889 Exam PDF Total Q&A: 126 Questions and Answers
Last Update: 06-26,2015

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Exam Code: 300-115
Exam Name: Implementing Cisco IP Switched Networks (SWITCH)
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300-115 Bootcamp Total Q&A: 165 Questions and Answers
Last Update: 06-26,2015

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NO.1 A network engineer must improve bandwidth and resource utilization on the switches by
stopping the inefficient flooding of frames on trunk ports where the frames are not needed. Which
Cisco IOS feature can be used to achieve this task?
A. VTP pruning
B. access list
C. switchport trunk allowed VLAN
D. VLAN access-map
Answer: A

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NO.2 Which private VLAN can have only one VLAN and be a secondary VLAN that carries
unidirectional traffic upstream from the hosts toward the promiscuous ports and the gateway?
A. isolated VLAN
B. primary VLAN
C. community VLAN
D. promiscuous VLAN
Answer: A

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NO.3 A Cisco Catalyst switch that is prone to reboots continues to rebuild the DHCP snooping
database. What is the solution to avoid the snooping database from being rebuilt after every device
reboot?
A. A DHCP snooping database agent should be configured.
B. Enable DHCP snooping for all VLANs that are associated with the switch.
C. Disable Option 82 for DHCP data insertion.
D. Use IP Source Guard to protect the DHCP binding table entries from being lost upon rebooting.
E. Apply ip dhcp snooping trust on all interfaces with dynamic addresses.
Answer: A

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NO.4 When you configure private VLANs on a switch, which port type connects the switch to the
gateway router?
A. promiscuous
B. community
C. isolated
D. trunked
Answer: A

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NO.5 Refer to the exhibit.
A network engineer investigates a recent network failure and notices that one of the interfaces on
the switch is still down. What is causing the line protocol on this interface to be shown as down?
A. There is a layer 1 physical issue.
B. There is a speed mismatch on the interface.
C. The interface is configured as the target of the SPAN session.
D. The interface is configured as the source of the SPAN session.
E. There is a duplex mismatch on the interface.
Answer: C

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NO.6 Refer to the exhibit.
Why would the switch be considered as a root bridge?
A. The bridge priority is 1 and all ports are forwarding.
B. The switch priority for VLAN 1 and the macro specifies "This Bridge is the root".
C. The bridge priority is 128.19 and all ports are forwarding.
D. The switch priority value is zero, it has the lowest priority value for VLAN 1.
Answer: D

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NO.7 Refer to the exhibit.
Which set of configurations will result in all ports on both switches successfully bundling into an
EtherChannel?
A. switch1 channel-group 1 mode active switch2 channel-group 1 mode auto
B. switch1 channel-group 1 mode desirable switch2 channel-group 1 mode passive
C. switch1 channel-group 1 mode on switch2 channel-group 1 mode auto
D. switch1 channel-group 1 mode desirable switch2 channel-group 1 mode auto
Answer: D

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NO.8 A network engineer wants to ensure Layer 2 isolation of customer traffic using a private VLAN.
Which configuration must be made before the private VLAN is configured?
A. Disable VTP and manually assign VLANs.
B. Ensure all switches are configured as VTP server mode.
C. Configure VTP Transparent Mode.
D. Enable VTP version 3.
Answer: C

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