参考答案和解析
正确答案:C
更多“When STP UplinkFast&”相关问题
  • 第1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 topology

    B. protect against user-side loops

    C. support business applications

    D. risk of lost connectivity without STP


    参考答案:B

  • 第2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.

    正确答案:C

  • 第3题:

    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

    正确答案:B

  • 第4题:

    What two things will occur when an edge port receives a BPDU?()

    • A、The port immediately transitions to the Forwarding state.
    • B、The switch generates a Topology Change Notification (TCN) BPDU.
    • C、The port immediately transitions to the err-disable state.
    • D、The port becomes a normal STP switch port.

    正确答案:B,D

  • 第5题:

    在STP中a)MTP和b)SCCP级消息传输之间的区别是什么?()

    • A、a)GTT在STP中、b)STP中无GTT
    • B、a)STP无GTT、b)GTT在STP中
    • C、无区别

    正确答案:B

  • 第6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 switches
    • B、 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 network
    • D、 To provide protection for STP when a link is unidirectional and BPDUs are being sent but not  received
    • E、 None of the other alternatives apply

    正确答案:B

  • 第7题:

    When STP UplinkFast is enabled on a switch utilizing the default bridge priority, what will the new bridgepriority be changed to?()

    • A、8192
    • B、16384
    • C、49152
    • D、65535

    正确答案:C

  • 第8题:

    When the Catalyst switch R1 is enabled to use VTP,  which information does it advertise on its  trunk ports?()

    • A、 VTP mode
    • B、 STP root status
    • C、 Negotiation status
    • D、 Management domain
    • E、 Configuration revision number

    正确答案:D,E

  • 第9题:

    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.


    正确答案: C
    解析: 暂无解析

  • 第10题:

    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

    The bridge timers will be set to match the 802.1D devices.

    E

    A secondary root bridge will always be populated within the 802.1D domain.

    F

    If the root bridge is selected within the 802.1D domain, the whole STP domain will run in 802.1D compatibility mode.

    G

    In partially migrated 802.1w networks, it is recommended to keep the STP diameter below 4.


    正确答案: B
    解析: 暂无解析

  • 第11题:

    单选题
    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


    正确答案: E
    解析: 暂无解析

  • 第12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

    8192

    B

    16384

    C

    49152

    D

    65535


    正确答案: D
    解析: 暂无解析

  • 第13题:

    在Quidway交换机上,要开启所有端口的STP功能,所用的命令是()

    • A、[Quidway]stp enable
    • B、[Quidway]stp enable all
    • C、[Quidway-Ethernet0/1]stp enable
    • D、[Quidway-Ethernet0/1]stp enable all

    正确答案:A

  • 第14题:

    Which two of the following values does STP take into consideration when it elects the root bridge?()

    • A、The BPDU version number
    • B、The access layer bridge setting
    • C、The Bridge ID
    • D、The spanning-tree update number
    • E、The bridge priority
    • F、The VLAN number

    正确答案:C,E

  • 第15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、The bridge timers will be set to match the 802.1D devices.
    • E、A secondary root bridge will always be populated within the 802.1D domain.
    • F、If the root bridge is selected within the 802.1D domain, the whole STP domain will run in 802.1D compatibility mode.
    • G、In partially migrated 802.1w networks, it is recommended to keep the STP diameter below 4.

    正确答案:B

  • 第16题:

    配置交换机SWA工作在RSTP工作模式下的命令为()

    • A、[SWA]stp mode rstp
    • B、[SWA-Ethernet1/0/4] stp mode rstp
    • C、[SWA] undo stp mode stp
    • D、[SWA-Ethernet1/0/4] undo stp mode stp

    正确答案:A

  • 第17题:

    在Quidway交换机上,要修改交换机STP的优先级,所用的命令是()

    • A、[Quidway]stp priority priority
    • B、[Quidway]stp port priority priority
    • C、[Quidway-Ethernet0/1]stp priority priority
    • D、[Quidway-Ethernet0/1]stp port priority priority

    正确答案:A

  • 第18题:

    Spanning Tree Protocol IEEE 802.1s defines the ability to deploy which of these? ()

    • A、one global STP instance for all VLANs
    • B、one STP instance for each VLAN
    • C、one STP instance per set of VLANs
    • D、one STP instance per set of bridges

    正确答案:C

  • 第19题:

    Two Company switches are connected via a trunk using VTP. Which VTP information does a  Catalyst switch advertise on its trunk ports when using VTP?()

    • A、STP root status
    • B、VTP mode
    • C、Negotiation status
    • D、Management domain
    • E、Configuration revision number

    正确答案:D,E

  • 第20题:

    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 topology

    B

    protect against user-side loops

    C

    support business applications

    D

    risk of lost connectivity without STP


    正确答案: B
    解析: 暂无解析

  • 第21题:

    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 VLANs

    B

    one STP instance for each VLAN

    C

    one STP instance per set of VLANs

    D

    one STP instance per set of bridges


    正确答案: C
    解析: 暂无解析

  • 第22题:

    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 switches

    B

     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 network

    D

     To provide protection for STP when a link is unidirectional and BPDUs are being sent but not  received

    E

     None of the other alternatives apply


    正确答案: B
    解析: 暂无解析

  • 第23题:

    单选题
    By default, all VLANs will belong to which MST instance when using Multiple STP? ()
    A

     MST00

    B

     MST01

    C

     the last MST instance configured

    D

     none


    正确答案: A
    解析: 暂无解析