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单选题In 802.1s, how is the VLAN to instance mapping represented in the BPDU?()A The VLAN to instance mapping is a normal 16-byte field in the MST BPDU.B The VLAN to instance mapping is a normal 12-byte field in the MST BPDU.C The VLAN to instance mapping is

题目
单选题
In 802.1s, how is the VLAN to instance mapping represented in the BPDU?()
A

The VLAN to instance mapping is a normal 16-byte field in the MST BPDU.

B

The VLAN to instance mapping is a normal 12-byte field in the MST BPDU.

C

The VLAN to instance mapping is a 16-byte MD5 signature field in the MST BPDU.

D

The VLAN to instance mapping is a 12-byte MD5 signature field in the MST BPDU.


相似考题
更多“In 802.1s, how is the VLAN to instance mapping represented i”相关问题
  • 第1题:

    How does ERS use the VLAN tag?()

    • A、to provide service internetworking
    • B、to support transparency for Layer 2 frames
    • C、as a connection identifier to indicate destination
    • D、as a mapping to the DLCI in service internetworking
    • E、to provide a trunk by which all VLANs can navigate from one site to one or multiple sites

    正确答案:C

  • 第2题:

    How many bits represented in DSCP?


    正确答案:6 bit

  • 第3题:

    Which three items are configured in MST configuration submode? ()

    • A、 Region name
    • B、 Configuration revision number
    • C、 VLAN instance map
    • D、 IST STP BPDU hello timer
    • E、  CST instance map
    • F、 PVST+ instance map

    正确答案:A,B,C

  • 第4题:

    What must be the same to make multiple switches part of the same Multiple Spanning Tree (MST)?()

    • A、VLAN instance mapping and revision number
    • B、VLAN instance mapping and member list
    • C、VLAN instance mapping, revision number, and member list
    • D、VLAN instance mapping, revision number, member list, and timers

    正确答案:A

  • 第5题:

    配置单层Tag的VLAN mapping时不需要配置外层VLAN的优先级。


    正确答案:正确

  • 第6题:

    关于S7800灵活QinQ和vlan mapping功能描述正确的有()。

    • A、S7800交换机支持1:1VLAN MAPPING和2:1VLAN MAPPING功能
    • B、S7800交换机只有SC类型单板支持2:1VLAN MAPPING功能
    • C、S7800交换机只有NNI端口(没有使能qinq enable的端口)支持2:1VLAN MAPPING功能
    • D、使用7800系列交换机的灵活QinQ功能时,不需要将设备设臵运行在l2-enhanced模式

    正确答案:A,B,C,D

  • 第7题:

    While logged into a Company switch you issue the following command:   CompanySwitch(config-mst)# instance 10 vlan 11-12   What does this command accomplish?()

    • A、 It enables a PVST+ instance of 10 for vlan 11 and vlan 12
    • B、 It enables vlan 11 and vlan 12 to be part of the MST region 10
    • C、 It maps vlan 11 and vlan 12 to the MST instance of 10.
    • D、 It creates an Internal Spanning Tree (IST) instance of 10 for vlan 11 and vlan 12  
    • E、 It create a Common Spanning Tree (CST) instance of 10 for vlan 11 and vlan 12
    • F、 It starts two instances of MST, one instance for vlan 11 and another instance for vlan 12.

    正确答案:C

  • 第8题:

    单选题
    VLAN Mapping 也称为 VLAN 映射,关于 VLAN Mapping 下面说法不正确的是()。
    A

    通常在公网的边缘节点设备上配置VLAN Mapping功能

    B

    VLAN Mapping可以节省公网VLAN资源

    C

    当两个不同VLAN的用户私网需要通过运营商公网通信,可以通过VLAN mapping来实现

    D

    VLAN Mapping只能用于用户VLAN处于同一私网VLAN的情况


    正确答案: A
    解析: 暂无解析

  • 第9题:

    单选题
    VLAN mapping可以实现不同VLAN间通信,下面关于VLAN mapping说法不正确的是()
    A

    VLAN Mapping也叫VLAN translation,发生在报文从入端口进来之后,从出端口转发出去之前

    B

    VLAN Mapping可以实现用户VLAN ID和运营商VLAN ID的相互转换

    C

    VLAN Mapping可以通过配置来实现

    D

    VLAN Mapping就是增加一层VLAN Tag


    正确答案: A
    解析: 暂无解析

  • 第10题:

    单选题
    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: D
    解析: 暂无解析

  • 第11题:

    单选题
    How does ERS use the VLAN tag?()
    A

    to provide service internetworking

    B

    to support transparency for Layer 2 frames

    C

    as a connection identifier to indicate destination

    D

    as a mapping to the DLCI in service internetworking

    E

    to provide a trunk by which all VLANs can navigate from one site to one or multiple sites


    正确答案: C
    解析: 暂无解析

  • 第12题:

    单选题
    VLAN mapping可以实现不同VLAN间通信,下面关于VLAN mapping说法不正确的是()。
    A

    VLAN Mapping也叫VLAN translation,发生在报文从入端口进来之后,从出端口转发出去之前

    B

    VLAN Mapping可以实现用户VLANID和运营商VLANID的相互转换

    C

    VLAN Mapping可以通过配置来实现

    D

    VLAN mapping就是增加一层VLANTag


    正确答案: D
    解析: 暂无解析

  • 第13题:

    以下关于MSTP中MST Instance的说法正确的是?()

    • A、VRP平台支持15个MST Instance,默认所有VLAN映射到MSTInstance 0。
    • B、VRP平台支持15个MST Instance,默认所有VLAN映射到MSTInstance 1。
    • C、VRP平台支持16个MST Instance,默认所有VLAN映射到MSTInstance 0。
    • D、VRP平台支持16个MST Instance,默认所有VLAN映射到MSTInstance 1。

    正确答案:C

  • 第14题:

    How does the Ethernet Relay Service use the VLAN tag?()

    • A、 to provide service internetworking
    • B、 to support transparency for Layer 2 frames
    • C、 as a connection identifier to indicate destination
    • D、 as a mapping to the DLCI in service internetworking
    • E、 to provide a trunk by which all VLANs can navigate from one site to one or multiple sites

    正确答案:C

  • 第15题:

    In 802.1s, how is the VLAN to instance mapping represented in the BPDU?()

    • A、The VLAN to instance mapping is a normal 16-byte field in the MST BPDU.
    • B、The VLAN to instance mapping is a normal 12-byte field in the MST BPDU.
    • C、The VLAN to instance mapping is a 16-byte MD5 signature field in the MST BPDU.
    • D、The VLAN to instance mapping is a 12-byte MD5 signature field in the MST BPDU.

    正确答案:C

  • 第16题:

    The Company network utilizes the Multiple-instance Spanning Tree protocol in its switched LAN.   Which three statements about the MST protocol (IEEE 802.1S) are true? ()

    • A、 To verify the MST configuration, the show pending command can be used in MST configuration  mode.
    • B、 When RSTP and MSTP are configured; UplinkFast and BackboneFast must also be enabled.
    • C、 All switches in the same MST region must have the same VLAN-to-instance mapping, but  different configuration revision numbers.
    • D、 All switches in an MST region, except distribution layer switches, should have their priority  lowered from the default value 32768.
    • E、 An MST region is a group of MST switches that appear as a single virtual bridge to adjacent  CST and MST regions.
    • F、 Enabling MST with the "spanning-tree modemst" global configuration command also enables  RSTP.

    正确答案:A,E,F

  • 第17题:

    以下关于MSTP中MST Instance和VLAN的映射关系的说法正确的是?()

    • A、每个VLAN只能映射到一个MST Instance。
    • B、每个MST Instance只能包含一个VLAN。
    • C、每个MST Instance最多包含16个VLAN。
    • D、每个VLAN可以映射到最多16个MST Instance。

    正确答案:A

  • 第18题:

    The network administrator maps VLAN 10 through 20 to MST instance 2.  How will this information be propagated to all appropriate switches?()

    • A、 Information will be carried in the RSTP BPDUs.
    • B、 It will be propagated in VTP updates.
    • C、 Information stored in the Forwarding Information Base and the switch will reply on query.  
    • D、 Multiple Spanning Tree must be manually configured on the appropriate switches.

    正确答案:D

  • 第19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20题:

    单选题
    What must be the same to make multiple switches part of the same Multiple Spanning Tree (MST)?()
    A

    VLAN instance mapping and revision number

    B

    VLAN instance mapping and member list

    C

    VLAN instance mapping, revision number, and member list

    D

    VLAN instance mapping, revision number, member list, and timers


    正确答案: B
    解析: 暂无解析

  • 第21题:

    单选题
    How does the Ethernet Relay Service use the VLAN tag?()
    A

     to provide service internetworking

    B

     to support transparency for Layer 2 frames

    C

     as a connection identifier to indicate destination

    D

     as a mapping to the DLCI in service internetworking

    E

     to provide a trunk by which all VLANs can navigate from one site to one or multiple sites


    正确答案: A
    解析: 暂无解析

  • 第22题:

    问答题
    How many bits represented in DSCP?

    正确答案: 6 bit
    解析: 暂无解析

  • 第23题:

    判断题
    配置单层Tag的VLAN mapping时不需要配置外层VLAN的优先级。
    A

    B


    正确答案:
    解析: 暂无解析

  • 第24题:

    单选题
    In 802.1s, how is the VLAN to instance mapping represented in the BPDU?()
    A

    The VLAN to instance mapping is a normal 16-byte field in the MST BPDU.

    B

    The VLAN to instance mapping is a normal 12-byte field in the MST BPDU.

    C

    The VLAN to instance mapping is a 16-byte MD5 signature field in the MST BPDU.

    D

    The VLAN to instance mapping is a 12-byte MD5 signature field in the MST BPDU.


    正确答案: C
    解析: 暂无解析