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【单项选择题】

When is a switched network that is running the Spanning Tree Protocol considered to be fully converged?（）

A、A. when all switches have the same BID as the root switch

B、B. when all switches have received the MAC address of each neighboring switch

C、C. when every enabled switch port has been assigned a unique identifier

D、D. when every operating switch port is in either the blocking or forwarding state

E、E. when all switches are in either client, server, or transparent mode

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更多“When is a switched network that is running the Spanning Tree Protocol considered to be fully converged?（）”相关的问题
第1题
[单选题] When is a first-hop redundancy protocol needed in the distribution layer?（）

A、when HSRP is not supported by the design  B、when multiple vendor devices need to be supported  C、when preempt tuning of the default gateway is needed  D、when a robust method of backing up the default gateway is needed  E、when the design implements Layer 2 between the access switch and the distribution switch  F、when the design implements Layer 3 between the access switch and the distribution switch  

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第2题
[多选题] Which two statements are true regarding an Ethernet collision domain?（）

A、The likelihood of collisions occurring increases when a switch is used.  B、The likelihood of collisions occurring increases when a hub is used.  C、If a hub is used, the collision domain is limited to each device and the hub.  D、If a switch is used, the collision domain is limited to each device and the switch.  

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第3题
[] （）, which consisted of seven short blasts and one prolonged blast, all passengers have to go to their assembly station.

A、A.When the distress alert is sounded  B、B.When the emergency equipment is switching on  C、C.When the general emergency alarm is sounded  D、D.When the distress broadcast is sounded  

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第4题
[单选题] How is UPSR and BLSR traffic rerouted during a protection switch when a complete fiber cable cut occurs?（）

A、Traffic is switched from the first node receiving the AIS indication.  B、Traffic is switched from the far side of the failure, allowing handshaking to occur.  C、UPSR traffic is switched from the terminating node, BLSR traffic is rerouted from the originating node in the ring.  D、UPSR traffic is switched from the terminating node, circuit by circuit. BLSR traffic is rerouted from the last reachable node in the ring.  

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第5题
[单选题] What is the purpose of Dual Ring Interconnect with D C for SDH rings？（）

A、Protects signals when a ring switch fails  B、Protects signals when multiple span switches fail  C、Protects pre-emptible traffic from being dropped when a ring switch occurs  D、Protects signals against any combination of link failure in each ring  

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第6题
[] What are two characteristics of a switch that is configured as a VTP client?（）

A、A.if a switch that is configured to operate in client mode cannot access a VTP server,then the switch reverts to transparent mode.  B、B.The local vlan configuration is updated only when an update that has a higher configuration revision number is received.  C、C.Vtp advertisements are not forwarded to neighboring switches that are configured in vtp transparent mode.  D、D.When switches in vtp client mode are rebooted,they send a vtp advertisement request to the vtp servers.  E、E.Vtp client is the default vtp mode  F、F.On switches that are configured to operate in client mode ,vlans can be created,deleted,or renamed locally  

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第7题
[单选题] Distribution layer: This layer includes LAN-based routers and layer 3 switches . When is a first-hop redundancy protocol needed in the distribution layer?（）

A、OSPF is not supported by the design  B、HSRP is not supported by the design  C、preempt tuning of the default gateway is needed  D、the design implements Layer 3 between the access switch and the distribution switch  

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第8题
[单选题] When comparing DSL broadband to cable broadband, which of the following is an advantage ofDSL broadband?（）

A、Upgraded copper lines allow maximum speed greater than cable  B、Signal is not shared back to the switch  C、Signal is shared back to the switch  D、Distance is not a factor in signal speed  

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第9题
[单选题] A technician needs to add network capacity. However, when plugging a second switch into the first switch, there is no link light. Which of the following is the cause of this situation?（）

A、The switches are not stackable  B、The cable was not wired using 568A  C、The cable needs to be a crossover cable  D、The switches have IGMP snooping enabled  

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