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Which two statements are true about BPDU port-guard and BPDU

题目
多选题
Which two statements are true about BPDU port-guard and BPDU filtering？（）
A

BPDU port-guard can be enabled globally， whereas BPDU filtering must be enabled on a per-interface basis.

B

When globally enabled， BPDU port-guard and BPDU filtering apply only to PortFast enabled ports.

C

When globally enabled， BPDU port-guard and BPDU filtering apply only to trunking-enabled ports.

D

When a BPDU is received on a BPDU port-guard enabled port， the interface goes into the err-disabled state.

E

When a BPDU is received on a BPDU filtering enabled port， the interface goes into the err-disabled state.

F

When a BPDU is received on a BPDU filtering enabled port， the interface goes into the STP blocking state.

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相似问题和答案

第1题：

Which two statements are true about precedence values in policy?() (Choose two.)

A. 1 is the default precedence.

B. A lower number is preferred.

C. A higher number is preferred.

D. 100 is the default precedence.


参考答案：B, D

第2题：

在同一端口上启用了BPDU防护和BPDU过滤，以下描述正确的是（）

  • A、BPDU防护生效，BPDU过滤失效
  • B、BPDU防护失效，BPDU过滤生效
  • C、BPDU防护和BPDU过滤同时生效
  • D、BPDU防护和BPDU过滤冲突，都失效

正确答案:B

第3题：

Which two statements are true about pool－based source NAT? ()(Choose two.)

A. PAT is not supported.

B. PAT is enabled by default.

C. It supports the address-persistent configuration option.

D. It supports the junos-global configuration option.


参考答案：B, C

第4题：

关于配置BPDU和TCN BPDU，说法正确的有（）。

  • A、配置BPDU仅从指定端口发出，TCN BPDU仅从根端口发出
  • B、配置BPDU通常仅由根桥周期性发出，TCN BPDU除根桥外其他网桥都可能发出
  • C、配置BPDU通常仅从根端口接收，TCN BPDU仅从指定端口接收
  • D、AIternate端口既不会发送配置BPDU也不会发送TCN BPDU

正确答案:A,B,C,D

第5题：

Which statement correctly describes enabling BPDU guard on an access port that is also enabled for PortFast？（）

  • A、Upon startup， the port transmits 10 BPDUs. If the port receives a BPDU， PortFast and BPDU guard are disabled on that port and it assumes normal STP operation.
  • B、The access port ignores any received BPDU.
  • C、If the port receives a BPDU， it is placed into the error-disable state.
  • D、BPDU guard is only configured globally and the BPDU filter is required for port-level configuration.

正确答案:C

第6题：

Which Cisco Catalyst feature automatically disables the port in an operational PortFast upon receipt of a BPDU?()

A.BackboneFast

B.UplinkFast

C.Root Guard

D.BPDU Guard

E.BPDU Filter


参考答案：D

第7题：

Which of the following characteristics describe the BPDU Guard feature？（Choose all that apply.）（）

  • A、A BPDU Guard port should only be configured on ports with PortFast enabled
  • B、BPDU Guard and PortFast should not be enabled on the same port.
  • C、BPDU Guard is used to ensure that superior BPDUs are not received on a switch port
  • D、A BPDU Guard port receiving a BPDU will go into err-disable state
  • E、A BPDU Guard port receiving a BPDU will be disabled
  • F、BPDU Guard can be enabled on any switch port

正确答案:A,E

第8题：

Which two statements are true about AH?() (Choose two.)

A. AH provides data integrity.

B. AH is identified by IP protocol 50.

C. AH is identified by IP protocol 51.

D. AH cannot work in conjunction with ESP


参考答案：A, C

第9题：

Which two statements are true about L2TP tunnels?（） (Choose two.)

  • A、Traffic is clear text
  • B、Traffic is encrypted 
  • C、They are initiated by the LNS
  • D、They are initiated by the LAC

正确答案:A,D

第10题：

Your network is suffering from regular outages. After troubleshooting， you learn that the transmit  lead of a fiber uplink was damaged. Which two features can prevent the same issues in the  future？（）

  • A、root guard
  • B、loop guard
  • C、BPDU guard
  • D、UDLD
  • E、BPDU skew detection

正确答案:B,D

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