hello timer
BPDU timer
Forward_delay timer
Max_age timer
Dead timer
Wait timer
第1题:
Which two of these are used in the selection of a root bridge in a network utilizing Spanning Tree ProtocolIEEE 802.1 D?()
第2题:
The network administrator has enabled BPDU guard on the LAN. Why is an effective way to prevent an unauthorized rogue switch from altering the spanning-tree topology of this network? ()
第3题:
Which three options are considered in the spanning-tree decision process?()
第4题:
Which two are effects of connecting a network segment that is running 802.1D to a network segment that is running 802.1w?()
第5题:
What is the purpose of the STP PortFast BPDU guard feature? ()
第6题:
Which statement is correct about RSTP port roles?()
第7题:
It ensures that BPDUs sent by the root bridge are forwarded in a timely manner
It enforces the root bridge placement in the network
It ensures that all ports receiving BPDUs from the root bridge are in the forwarding state.
It ensures that the bridge is elected as root bridge in the network.
第8题:
The designated port is the switch port on every nonroot bridge that is the chosen path to theroot bridge. There can be only one designated port on every switch. The designated portassumes the forwarding state in a stable active topology. All switches connected to a given segment listen to all BPDUs and determine the switch that will be the root switch for a particular segment.
The disabled port is an additional switch port on the designated switch with a redundant link to the segment for which the switch is designated. A disabled port has a higher port ID than the disabled port on the designated switch. The disabled port assumes the discarding state in astable active topology.
The backup port is a switch port that offers an alternate path toward the root bridge. The backup port assumes a discarding state in a stable, active topology. The backup port will be present on nondesignated switches and will make a transition to a designated port if the current designated path fails.
The root port is the switch port on every nonroot bridge that is the chosen path to the root bridge. There can be only one root port on every switch. The root port assumes the forwarding state in a stable active topology.
第9题:
lowest root bridge id;lowest sender bridge id;lowest port id;lowest root path cost
lowest root path cost;lowest root bridge id;lowest sender bridge id;lowest sender port id
lowest root bridge id;lowest sender bridge id;lowest root path cost;lowest sender port id
lowest root bridge id;lowest root path cost;lowest sender bridge id;lowest sender port id
第10题:
enable concatenation on the non-root bridge only
enable concatenation on the root bridge only
enable concatenation on both the root bridge and non-root bridge
enable concatenation on the root bridge and set it as desirable on the non-root bridge
set concatenation as desirable on the root bridge and enable it on the non-root bridge
第11题:
STP timers values (hello, forward delay, max age) are included in each BPDU.
A switch is not concerned about its local configuration of the STP timers values. It will only consider the value of the STP timers contained in the BPDU it is receiving.
To successfully exchange BPDUs between two switches, their STP timers value (hello, forward delay, max age) must be the same.
If any STP timer value (hello, forward delay, max age) needs to be changed, it should at least be changed on the root bridge and backup root bridge.
On a switched network with a small network diameter, the STP hello timer can be tuned to a lower value to decrease the load on the switch CPU.
The root bridge passes the timer information in BPDUs to all routers in the Layer 3 configuration.
第12题:
BPDU guard can be used to prevent invalid BPDUs from propagating throughout the network.
BPDU guard can guarantee proper selection of the root bridge.
BPDU guard can be utilized to prevent the switch from transmitteing BPDUs and incorrectly altering the root bridge election.
BPDU guard can be utilized along with PortFast to shut down ports when a switch is connected to the port.
None of the other alternatives apply
第13题:
If the root bridge fails, configuration BPDUs will no longer be sent. Which STP timer will have toexpire before the other switches can actively restore connectivity with topology change procedureof STP?()
第14题:
The classic Spanning Tree Protocol (802.1D 1998) uses which sequence of variables to determine the best received BPDU?()
第15题:
For the following ports, which port is on every bridge in a Spanning Tree Protocol IEEE 802.1w network except the root bridge?()
第16题:
Which three statements about STP timers are true?()
第17题:
As a network administrator, can you tell me what the root guard feature provides in a bridgednetwork?()
第18题:
802.1D bridges do not relay BPDUs.
802.1w bridges do not relay BPDUs.
802.1D bridges only relay BPDUs received from the root.
802.1w bridges only relay BPDUs received from the root.
第19题:
lowest root bridge ID
lowest path cost to root bridge
lowest sender bridge ID
highest port ID
highest root bridge ID
highest path cost to root bridge
第20题:
802.1D bridges do not relay BPDUs.
802.1w bridges do not relay BPDUs.
802.1D bridges only relay BPDUs received from the root.
802.1w bridges only relay BPDUs received from the root.
第21题:
1) lowest root bridge id,2)lowest sender bridge id,3)lowest port id,4)lowest root path cost
1) lowest root path cost,2)lowest root bridge id,3)lowest sender bridge id,4)lowest sender port id
1) lowest root bridge id,2)lowest sender bridge id,3)lowest root path cost 4)owest sender port id
1) lowest root bridge id,2)lowest root path cost,3)lowest sender bridge id,4)lowest sender port id
第22题:
enable concatenation on the non-root bridge only
enable concatenation on the root bridge only
enable concatenation on both the root bridge and non-root bridge
enable concatenation on the root bridge and set it as desirable on the non-root bridge
set concatenation as desirable on the root bridge and enable it on the non-root bridge
第23题:
If BPDUs are not received on a non-designated port, the port is moved into the STP loop- inconsistent blocked state
IF BPDUs are received on a PortFast enabled port, the port is disabled.
If superior BPDUs are received on a designated port, the interface is placed into the root- inconsistent blocked state.
If inferior BPDUs are received on a root port, all blocked ports become alternate paths to the root bride.