Your ARPA has two guard zones．What is the purpose of the inner guard zone ________．A.Alert the watch officer that a vessel is approaching the preset CPA limitB.Warn of small targets that are initially detected closer than the outer guard zoneC.Guard against target loss during critical maneuvering situationsD.Sound an alarm for targets first detected within the zone
Your ARPA has two guard zones．What is the purpose of the inner guard zone ________．
A.Alert the watch officer that a vessel is approaching the preset CPA limit
B.Warn of small targets that are initially detected closer than the outer guard zone
C.Guard against target loss during critical maneuvering situations
D.Sound an alarm for targets first detected within the zone
相关考题：
The police warned people to be _________ for pickpockets during the Christmas rush. A.at guardB.on earsC.guard our attentionD.on guard
The security guard _____ two men who were yelling in the courtroom.[A] expelled[B] propelled[C] repelled[D] dispelled
Which step should be taken，if possible，when the vessel must be abandoned because of a distress situation ________．A.Alert the Coast Guard by using the survival craft's portable INMARSAT unitB.Program the SART and EPIRB to transmit the vessel's location and situationC.Place the SART and EPIRB in the“ON”position and secure them to the survival craftD.No additional steps are needed as the SART and EPIRB will both automatically float free and operate properly
Your vessel is being assisted through an ice field in Thunder Bay by the Canadian Coast Guard icebreaker Alexander Henry．The starboard lookout reports that the icebreaker has run up the code flag N（November）．What action should you take ________．A.Reduce speedB.Stop your enginesC.Reverse your enginesD.Stop your vessel instantly
The security guard_two men who were yelling in the courtroom.A.expelledB.propelledC.repelledD.dispelled
Which of the following characteristics describe the BPDU Guard feature（）A、ABPDU 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、ABPDU Guard port receiving a BPDU will go into err-disablestate.E、ABPDU Guard port receiving a BPDU will be disabled.F、BPDU Guard can be enabled on any switch port.
Loop guard and UniDirectional Link Detection both protect against Layer 2 STP loops. In which two ways does loop guard differ from UDLD in loop detection and prevention？（）A、Loop guard can be used with root guard simultaneously on the same port on the same VLAN while UDLD cannot.B、UDLD protects against STP failures caused by cabling problems that create one-way links.C、Loop guard detects and protects against duplicate packets being received and transmitted on different ports.D、UDLD protects against unidirectional cabling problems on copper and fiber media.E、Loop guard protects against STP failures caused by problems that result in the loss of BPDUs from a designated switch port.
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？ （）A、BPDU guard can be used to prevent invalid BPDUs from propagating throughout the network. B、BPDU guard can guarantee proper selection of the root bridge.C、BPDU guard can be utilized to prevent the switch from transmitteing BPDUs and incorrectly altering the root bridge election.D、BPDU guard can be utilized along with PortFast to shut down ports when a switch is connected to the port.E、None of the other alternatives apply
What is the result of entering the command spanning-tree loopguard default？（）A、The command enables both loop guard and root guard.B、The command changes the status of loop guard from the default of disabled to enabled.C、The command activates loop guard on point-to-multipoint links in the switched network.D、The command will disable EtherChannel guard.
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
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.
What is the purpose of the STP PortFast BPDU guard feature？ （）A、enforce the placement of the root bridge in the networkB、ensure that a port is transitioned to a forwarding state quickly if a BPDU is receivedC、enforce the borders of an STP domainD、ensure that any BPDUs received are forwarded into the STP domain
What two features in Cisco switches help prevent Layer 2 loops？（）A、UniDirectional Link DetectionB、Hot Standby Router ProtocolC、Virtual Router Redundancy ProtocolD、PortFastE、root guardF、loop guard
单选题What is the result of entering the command spanning-tree loopguard default？（）AThe command enables both loop guard and root guard.BThe command changes the status of loop guard from the default of disabled to enabled.CThe command activates loop guard on point-to-multipoint links in the switched network.DThe command will disable EtherChannel guard.
单选题When using the ARPA in heavy rain，which action should you take? （）AIncrease the radar gain to pick up weak echoes through the rainBIncrease the STC setting to reduce close-in spurious signalsCNavigate as though the effective range of the radar has been reducedDIncrease the range of the inner and outer guard rings
单选题Which statement is true about loop guard？（）ALoop guard only operates on interfaces that are considered point-to-point by the spanning tree.BLoop guard only operates on root ports.CLoop guard only operates on designated ports.DLoop guard only operates on edge ports.
单选题Your ARPA has two guard zones.What is the purpose of the inner guard zone（）.AAlert the watch officer that a vessel is approaching the preset CPA limitBWarn of small targets that are initially detected closer than the outer guard zoneCGuard against target loss during critical maneuvering situationsDSound an alarm for targets first detected within the zone
多选题Loop guard and UniDirectional Link Detection both protect against Layer 2 STP loops. In which two ways does loop guard differ from UDLD in loop detection and prevention？ （）ALoop guard can be used with root guard simultaneously on the same port on the same VLAN while UDLD cannotBUDLD protects against STP failures caused by cabling problems that create one-way links.CLoop guard detects and protects against duplicate packets being received and transmitted on different portsDUDLD protects against unidirectional cabling problems on copper and fiber media.ELoop guard protects against STP failures caused by problems that result in the loss of BPDUs from a designated switch port.
单选题Which of the following is true according to the passage?AThe man was a heavy smoker.BThe man smiled to please the guard.CThe guard set the man free with permission.DThe man hadn’t thought the guard would set him free.
多选题What two features in Cisco switches help prevent Layer 2 loops？（）AUniDirectional Link DetectionBHot Standby Router ProtocolCVirtual Router Redundancy ProtocolDPortFastEroot guardFloop guard
单选题Your ARPA has been tracking a target and has generated the targets course and speed.The radar did not receive a target echo on its last two scans due to the weather.What should you expect under these circumstances（）.AThe ARPA will generate data as if the target was still being tracked by radarBThe ARPA will give an audible and/or visual lost target alarmCThe ARPA will generate data based on sea return echoes from the vicinity where the target was lostDThe ARPA has lost all memory of the target and must recompute the target data
单选题Where would you find a list of the lifesaving equipment onboard your supply boat? （）AShip's ArticlesBMuster List (Station Bill)CCertificate of InspectionDCoast Guard Regulations
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
多选题Which of the following characteristics describe the BPDU Guard feature（）AABPDU Guard port should only be configured on ports with PortFast enabled.BBPDU Guard and PortFast should not be enabled on the same port.CBPDU Guard is used to ensure that superior BPDUs are not received on a switch port.DABPDU Guard port receiving a BPDU will go into err-disablestate.EABPDU Guard port receiving a BPDU will be disabled.FBPDU Guard can be enabled on any switch port.
单选题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？ （）ABPDU guard can be used to prevent invalid BPDUs from propagating throughout the network. BBPDU guard can guarantee proper selection of the root bridge.CBPDU guard can be utilized to prevent the switch from transmitteing BPDUs and incorrectly altering the root bridge election.DBPDU guard can be utilized along with PortFast to shut down ports when a switch is connected to the port.ENone of the other alternatives apply
单选题What will cause the ARPA to emit a visual alarm，audible alarm，or both?（）AAn acquired target entering into a guard zoneBA tracked target lost for one radar scanCA tracked target entering your preset CPA-TCPA limitsDA target being initially detected within a guard zone
单选题Coast Guard regulations require a shipboard Oil Pollution Emergency Plan to be reviewed（）.AannuallyBonce every two yearsConce every four yearsDonce every five years