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单选题
How long will a port remain in the listening state by default？（）
A
Depends on the number of switches in the spanning tree domain
B
50 seconds
C
15 seconds
D
Until the root directs it to start forwarding
E
20 seconds
F
Depends on the pott speed
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更多 “单选题How long will a port remain in the listening state by default？（）A Depends on the number of switches in the spanning tree domainB 50 secondsC 15 secondsD Until the root directs it to start forwardingE 20 secondsF Depends on the pott speed” 相关考题
考题
Could you tell me ()?
A、how long you live hereB、how long have you lived hereC、how long you have lived hereD、how long did you live here
考题
______ it is from Bristol to Glasgow!A、What long a wayB、What distanceC、How long wayD、How far
考题
Could you please tell me ____________________ ?
A、how long have you lived hereB、how long you lived hereC、how long you have lived hereD、you have lived here how long
考题
This is really a long story, but it is worth () .
A、listenB、listening toC、listen to itD、to listen
考题
For the accompanying router output, which of the following statements describes the stat e that neighbor 172.16.254.3 is in?()
A. The router will not accept connections from the peer.B. BGP can exchange routing information in this state.C. The router is listening on its server port for connection requests from the peer.D. The router ha s sent out an active TCP connection request to the peer.
考题
A vessel arrives in a foreign port and the Master is informed that the vessel is being sold to foreign interests. The new owners request that the crew remain on board to complete the voyage. Under these circumstances，the crew ______.A.have the right to an immediate discharge and transportation to original port of engagementB.must remain on boardC.must comply with the decision made by the MasterD.must remain aboard until the vessel is delivered to the new owners at a mutually agreed upon port
考题
初中英语?听说
一、考题回顾
二、考题解析
【教案】
Teaching aims:
Knowledge aim:
Students will master the sentence structure: How far...? How high...? How long....? and so on.
Ability aim:
Students will improve their abilities of speaking and listening.
Emotional aim:
Students will be more confident in speaking English and use the sentence structures in daily life.
Key and difficult point:
Key Point: Students will master how to describe the height and distance in English.
Difficult Point: Students will use the sentence structures in daily life.
Teaching procedure:
Step 1: Warming-up
1. Greetings.
2. Sing a song called Five hundred away to lead in the class.
Step 2: Pre-listening
1. Show students some pictures of the Great Pyramid of Khufu and the Great Sphinx. Let them to predict what we will learn today.
Step 3: While-listening
1st listening: Ask students to listen to the tape for the first time and check if their prediction is correct or not and try to get the main idea of the dialogue.
2nd listening: Ask students to listen to the tape for the second time and answer the following questions.
①. How far are the pyramids from Cairo?
②. How old is the Great Sphinx?
③. How long is the Nile River?
3rd listening: Ask students to listen to the tape for the third time, read after the tape and invite several students to
Step4: Post-listening
Role-play: ask students to work in pairs. One works as an interviewer, and the other works as an interviewee to make a dialogue about an unforgettable trip. And give them five minutes to prepare it.
Step5: Summary and Homework
Summary: ask a student to conclude the content of the lesson and summarize with the whole class.
Homework: ask students to search the Internet to find more information about Africa.
Blackboard design:
1. How to lead in the class?
2. What is the standard of a good lesson?
考题
Nobody knew_______there.（ ）A.how long time I had been
B.how long had I been
C.how long time had I been
D.how long I had been
考题
How long will a port remain in the listening state by default？（）A、Depends on the number of switches in the spanning tree domainB、50 secondsC、15 secondsD、Until the root directs it to start forwardingE、20 secondsF、Depends on the pott speed
考题
If a port configured with STP loop guard stops receiving BPDUs， the port will be put into which state？（）A、learning stateB、listening stateC、forwarding stateD、root-inconsistent state
考题
What two things will occur when an edge port receives a BPDU？（）A、The port immediately transitions to the Forwarding state.B、The switch generates a Topology Change Notification （TCN） BPDU.C、The port immediately transitions to the err-disable state.D、The port becomes a normal STP switch port.
考题
What will occur when a nonedge switch port that is configured for Rapid Spanning Tree does not receive a BPDU from its neighbor for three consecutive hello time intervals？（）A、RSTP information is automatically aged out.B、The port sends a TCN to the root bridge.C、The port moves to listening state.D、The port becomes a normal spanning tree port.
考题
Which of the following characteristics describe the Root Guard feature？（Choose all that apply.）（）A、The port must be put into forwarding state manually after root-inconsistent state has beencorrectedB、A Root Guard port receiving superior BPDU goes into a root-inconsistent stateC、A Root Guard port receiving inferior BPDU goes into a root-inconsistent stateD、While the port is in a root-inconsistent state no user data is sent across that portE、The port returns to a forwarding state if inferior BPDUs stopF、It should be applied to all switch ports
考题
Under which two circumstances would an RSTP bridge flush its CAM table？（）A、upon a port state changeB、upon receiving a topology change notificationC、when transitioning from discarding to forwardingD、when transitioning from forwarding to discardingE、only when changing from listening to discardingF、when CAM resources have been completely used up
考题
Which statement is correct about RSTP port roles？（）A、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.B、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.C、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.D、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.
考题
Which two statements concerning STP state changes are true？ （）A、Upon bootup，a port transitions from blocking to forwarding because it assumes itself as root.B、Upon bootup，a port transitions from blocking to listening because it assumes itself as root.C、Upon bootup，a port transitions from listening to forwarding because it assumes itself as root.D、If a forwarding port receives no BPDUs by the max_age time limit， it will transition to listening.E、If a forwarding port receives an inferior BPDU， it will transition to listening.F、If a blocked port receives no BPDUs by the max_age time limit， it will transition to listening.
考题
In IS-IS， how long will the restart helper keep the restarting router in the up state？（）A、The hello dead timer expires.B、The restart duration timer expires.C、The restarting router sets the down bit.D、The restart helper sends out three CSNPs.
考题
You install a third-party application on your computer. The application uses port 80 to negotiate a listening port. After establishing the listening port， the application uses dynamic ports above 6000. You need to configure Microsoft Windows Firewall to allow traffic for the application. What should you do？ （）A、Add a port exception for port 80.B、Disable the Core Networking exception.C、Restore the Windows Firewall defaults.D、Add a program exception for the new application.
考题
单选题In IS-IS, how long will the restart helper keep the restarting router in the up state?（）A
until the hello dead timer expiresB
until the restart duration timer expiresC
until the restarting router sets the down bitD
until the restart helper sends out three CSNPs
考题
单选题I don’t know ______ that you will stay here.A
how long it isB
how long is itC
it is how longD
is it how long
考题
单选题If a port configured with STP loop guard stops receiving BPDUs，the port will be put into which state？（）A
learning stateB
listening stateC
forwarding stateD
root-inconsistent state
考题
单选题Which statement is correct about RSTP port roles？（）A
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.B
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.C
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.D
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.
考题
多选题Under which two circumstances would an RSTP bridge flush its CAM table？（）Aupon a port state changeBupon receiving a topology change notificationCwhen transitioning from discarding to forwardingDwhen transitioning from forwarding to discardingEonly when changing from listening to discardingFwhen CAM resources have been completely used up
考题
单选题A vessel arrives in a foreign port and the Master is informed that the vessel is being sold to foreign interests. The new owners request that the crew remain on board to complete the voyage. Under these circumstances，the crew（）.A
have the right to an immediate discharge and transportation to original port of engagementB
must remain on boardC
must comply with the decision made by the MasterD
must remain aboard until the vessel is delivered to the new owners at a mutually agreed upon port
考题
单选题What will occur when a nonedge switch port that is configured for Rapid Spanning Tree does not receive a BPDU from its neighbor for three consecutive hello time intervals？（）A
RSTP information is automatically aged out.B
The port sends a TCN to the root bridge.C
The port moves to listening state.D
The port becomes a normal spanning tree port.
考题
多选题What two things will occur when an edge port receives a BPDU？（）AThe port immediately transitions to the Forwarding state.BThe switch generates a Topology Change Notification （TCN） BPDU.CThe port immediately transitions to the err-disable state.DThe port becomes a normal STP switch port.
考题
多选题Which of the following characteristics describe the Root Guard feature？（Choose all that apply.）（）AThe port must be put into forwarding state manually after root-inconsistent state has beencorrectedBA Root Guard port receiving superior BPDU goes into a root-inconsistent stateCA Root Guard port receiving inferior BPDU goes into a root-inconsistent stateDWhile the port is in a root-inconsistent state no user data is sent across that portEThe port returns to a forwarding state if inferior BPDUs stopFIt should be applied to all switch ports
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