How does ERS use the VLAN tag?()A. to provide service internetworkingB. to support transparency for Layer 2 framesC. as a connection identifier to indicate destinationD. as a mapping to the DLCI in service internetworkingE. to provide a trunk by which all

题目
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


相似考题
更多“How does ERS use the VLAN tag?() ”相关问题
  • 第1题:

    ()可以给帧加上双重Tag,即在原来Tag的基础上,给帧加上一个新的Tag,从而可以支持多达4096*4096个VLAN,满足城域网对VLAN数量的需求。


    正确答案:Q-in-Q

  • 第2题:

    请讲述Port-VLAN和Tag-VLAN的特点及应用环境。


    正确答案: 1、Port-VLAN的特点:一个端口只能属于一个VLAN,不打标签
    2、Tag-VLAN的特点:一个端口可以属于多个VLAN,打标签802.1q
    3、Port-VLAN一般用于连接用户主机
    4、Tag-VLAN一般用于交换机之间级联

  • 第3题:

    When you enter the interface command auto qos voip cisco-phone on a port at the edge of a network,how does the Cisco Catalyst switch detect if a Cisco IP Phone is connected to the port?()

    • A、by snooping the CoS marking on the incoming frames
    • B、by using RTP hello messages between the switch port and the Cisco IP Phone
    • C、by using CDP
    • D、by using DHCP snooping
    • E、by snooping the incoming 802.1Q VLAN tag

    正确答案:C

  • 第4题:

    当ONU端口的链路类型为Access,其对上行报文的处理方式为()。

    • A、只允许不带tag的报文通过,并为报文添加缺省VLAN的tag
    • B、仅允许带有缺省VLAN tag的报文通过,并去Tag
    • C、对于收到的不带Tag的报文,添加缺省VLAN tag,对于收到的带tag的报文,直接转发
    • D、仅允许带tag的报文通过

    正确答案:A

  • 第5题:

    VLAN Tagging, also known as Frame Tagging, is a method developed by Cisco to help identify packets travelling through trunk links. When an Ethernet frame traverses a trunk link, a special VLAN tag is added to the frame and sent across the trunk link .How does ERS use the VLAN tag?()

    • A、provide service internetworking
    • B、support transparency for Layer 2 frames
    • C、indicate destination as a connection identifier
    • D、map to the DLCI in service internetworking

    正确答案:C

  • 第6题:

    The Company core switches use 802.1Q trunks to connect to each other.  How does 802.1Q  trunking keep track of multiple VLANs? ()

    • A、 It tags the data frame with VLAN information and recalculates the CRC value
    • B、 It encapsulates the data frame with a new header and frame check sequence
    • C、 It modifies the port index of a data frame to indicate the VLAN
    • D、 It adds a new header containing the VLAN ID to the data frame
    • E、 None of the other alternatives apply

    正确答案:A

  • 第7题:

    Company.com is planning for an HACMP cluster and wants to know more about the network requirements. The plan is to use IPAT via IP aliasing and heartbeating via IP aliasing to preserve the corporate IP addresses. Currently the customer uses a separate VLAN for each individual subnet.  Which statement best describes how HACMP co-exists with VLAN’s in this configuration?()   

    • A、 All subnets in use by HACMP must be in the same VLAN.
    • B、 All subnets in sue by HACMP must be in a different VLAN.
    • C、 HACMP does not support multiple subnets when using heartbeating via IP aliasing.
    • D、 HACMP does not support the use of VLAN.

    正确答案:A

  • 第8题:

    多选题
    关于Access端口上的PVID,说法正确的是()
    A

    当接口接收到不带VLAN Tag的报文时,将该报文加上VLAN Tag标记,并将Tag中的VID字段的值设置为接口所属的缺省VLAN编号

    B

    当接口接收到带VLAN Tag的报文时,如果该报文的VLAN ID与接口缺省的VLAN ID相同,将转发该报文;如果该报文的VLAN ID与接口缺省的VLAN ID不相同,则丢弃该报文

    C

    当接口发送带有VLAN Tag的报文时,如果该报文的VLAN ID与接口缺省的VLAN ID相同,则系统将去掉报文的VLAN Tag,然后再发送该报文

    D

    Access发往对端设备的以太网帧永远是不带标签的帧

    E

    以上说法都不正确


    正确答案: C,D
    解析: access端口发送的是不带tag的帧,同样,它收到的帧肯定也不带tag,所以就不存在收到带tag的帧,b选项错误,故答案为ACD。

  • 第9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10题:

    单选题
    The Outer.1Q tag represents customer VLAN ID and inner.1Q tag represents Provider VLAN?()
    A

    The Outer.1Q tag represents customer VLAN ID and inner.1Q tag represents Provider VLAN (PVLAN )

    B

    It is an effective way to achieve VLAN transparency between Provider and enterprise customer bytunneling one ser of VLAN tags inside a second VLAN tag

    C

    The Outer.1Q tag represents Service VLAN (PVLAN) and inner.1Q tag represents customer VLAN

    D

    QinQ is a way to hide native VLAN which can conflict with Provider native VLAN


    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
    The Company core switches use 802.1Q trunks to connect to each other.  How does 802.1Q  trunking keep track of multiple VLANs? ()
    A

     It tags the data frame with VLAN information and recalculates the CRC value

    B

     It encapsulates the data frame with a new header and frame check sequence

    C

     It modifies the port index of a data frame to indicate the VLAN

    D

     It adds a new header containing the VLAN ID to the data frame

    E

     None of the other alternatives apply


    正确答案: E
    解析: 暂无解析

  • 第13题:

    –How long does the bus?-()About half an hour.

    • A、spend
    • B、take
    • C、use

    正确答案:A

  • 第14题:

    The Outer.1Q tag represents customer VLAN ID and inner.1Q tag represents Provider VLAN?()

    • A、The Outer.1Q tag represents customer VLAN ID and inner.1Q tag represents Provider VLAN (PVLAN )
    • B、It is an effective way to achieve VLAN transparency between Provider and enterprise customer bytunneling one ser of VLAN tags inside a second VLAN tag
    • C、The Outer.1Q tag represents Service VLAN (PVLAN) and inner.1Q tag represents customer VLAN
    • D、QinQ is a way to hide native VLAN which can conflict with Provider native VLAN

    正确答案:C

  • 第15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16题:

    以下以太网端口TAG设置,当数据包进入时,会添加默认VLAN标签,出口时又会剥离默认VLAN标签的有()。

    • A、ACCESS
    • B、Tag Aware
    • C、Hybird

    正确答案:A,C

  • 第17题:

    What protocol does an IP phone use to learn the voice VLAN ID it should use for voice traffic?()

    • A、VTP
    • B、802.1 q
    • C、CDP
    • D、Skinny Station Protocol

    正确答案:C

  • 第18题:

    VLAN端口类型有()。

    • A、Access
    • B、Trunk
    • C、Hybrid
    • D、tag

    正确答案:A,B,C

  • 第19题:

    单选题
    What protocol does an IP phone use to learn the voice VLAN ID it should use for voice traffic?()
    A

    VTP

    B

    802.1 q

    C

    CDP

    D

    Skinny Station Protocol


    正确答案: A
    解析: 暂无解析

  • 第20题:

    单选题
    When you enter the interface command auto qos voip cisco-phone on a port at the edge of a network, how does the Cisco Catalyst switch detect if a Cisco IP Phone is connected to the port? ()
    A

    by snooping the CoS marking on the incoming frames

    B

    by using RTP hello messages between the switch port and the Cisco IP Phone

    C

    by using CDP

    D

    by using DHCP snooping

    E

    by snooping the incoming 802.1Q VLAN tag


    正确答案: D
    解析: 暂无解析

  • 第21题:

    单选题
    Company.com is planning for an HACMP cluster and wants to know more about the network requirements. The plan is to use IPAT via IP aliasing and heartbeating via IP aliasing to preserve the corporate IP addresses. Currently the customer uses a separate VLAN for each individual subnet.  Which statement best describes how HACMP co-exists with VLAN’s in this configuration?()
    A

     All subnets in use by HACMP must be in the same VLAN.

    B

     All subnets in sue by HACMP must be in a different VLAN.

    C

     HACMP does not support multiple subnets when using heartbeating via IP aliasing.

    D

     HACMP does not support the use of VLAN.


    正确答案: C
    解析: 暂无解析

  • 第22题:

    单选题
    以下关于QinQ VLAN说法不正确的是()
    A

    QinQ VLAN是通过提供一种简单的二层隧道来确保该企业内部VLAN Tag能够正确的到达远端网络

    B

    QinQ VLAN特性主要是为了满足让公网VLAN Tag和业务能直接透明传输到对端的功能

    C

    报文在骨干网中根据公网VLAN Tag传输,大大节省了公网VLAN ID资源

    D

    QinQ VLAN主要作为专线应用


    正确答案: A
    解析: 暂无解析

  • 第23题:

    多选题
    如下关于VLAN Mapping的说法不正确的是()
    A

    端口在向外发送本地VLAN的帧时,将帧中的VLAN Tag替换成外部VLAN的VLAN Tag

    B

    在接收外部VLAN的帧时,将帧中的VLAN Tag替换成本地VLAN的VLAN Tag

    C

    在入端口接受外部VLAN的帧时,不会修改VLAN TAG,只在本端口对外发送时,修改成外部的VLAN TAG

    D

    端口只对收到外部VLAN的帧修改VLAN TAG,在本端口对外发送时不需要修改VLAN TAG


    正确答案: C,B
    解析: 暂无解析