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When STP UplinkFast is enabled on a switch utilizing the default bridge priority， what will the new bridge priority be changed to？（）
- A、8192
- B、16384
- C、49152
- D、65535
参考答案
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When STP UplinkFast is enabled on a switch utilizing the default bridge priority， what will the new bridgepriority be changed to？（）A、8192B、16384C、49152D、65535
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单选题You are the network consultant from Cisco.com. Please point out the reason that STP required when VLANs do not span access layer switches.（）A
ensure a loop-free topologyB
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support business applicationsD
risk of lost connectivity without STP
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单选题How are STP timers and state transitions affected when a topology change occurs in an STP environment？（）A
All ports will temporarily transition to the learning state for a period equal to the max age timer plus the forward delay interval.B
All ports will transition temporarily to the learning state for a period equal to the forward delay interval.C
The default aging time for MAC address entries will be reduced for a period of the max age timer plus the forward delay interval.D
The default hello time for configuration BDPUs will be reduced for the period of the max age timer.
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单选题Spanning Tree Protocol IEEE 802.1 s defines the ability to deploy which of these？（）A
one global STP instance for all VLANsB
one STP instance for each VLANC
one STP instance per set of VLANsD
one STP instance per set of bridges
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单选题You have done a partial migration from 802.1D STP to 802.1w STP. Which of the following is true？（）A
802.1D and 802.1w interoperate only when the 802.1D STP domain supports rapid convergence.B
Ports leading to 802.1D devices will run in compatibility mode， while the rest of the ports will run in 802.1w mode.C
This is an invalid configuration and a partial migration cannot be done.D
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In partially migrated 802.1w networks， it is recommended to keep the STP diameter below 4.
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单选题pany uses MSTP within their switched LAN. What is the main purpose of Multiple Instance Spanning Tree Protocol （MSTP）？（）A
To enhance Spanning Tree troubleshooting on multilayer switchesB
To reduce the total number of spanning tree instances necessary for a particular topology C
To provide faster convergence when topology changes occur in a switched networkD
To provide protection for STP when a link is unidirectional and BPDUs are being sent but not receivedE
None of the other alternatives apply
考题
单选题Why is STP required when VLANs span access layer switches？（）A
to ensure a loop-free topologyB
to protect against user-side loopsC
in order to support business applicationsD
because of the risk of lost connectivity without STPE
for the most deterministic and highly available network topology
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单选题By default， all VLANs will belong to which MST instance when using Multiple STP？ （）A
MST00B
MST01C
the last MST instance configuredD
none
考题
单选题When STP UplinkFast is enabled on a switch utilizing the default bridge priority， what will the new bridge priority be changed to？（）A
8192B
16384C
49152D
65535
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