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
Which statement is true about loop guard？（）
A
Loop guard only operates on interfaces that are considered point-to-point by the spanning tree.
B
Loop guard only operates on root ports.
C
Loop guard only operates on designated ports.
D
Loop guard only operates on edge ports.
参考解析
解析：
暂无解析
相关考题：
Which statement is true about terms in a policy?() A. A single term can be applied to a protocol or interface, independent of the policy.B. Once configured, terms within a policy cannot be reordered.C. The name of a term is limited to five characters.D. A from statement is optional in a term.
Which statement is true about IBGP routers? () A. They must be fully meshedB. They can be in a different ASC . They do not need to be directly connectedD. They must be directly connected
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 cannotB、 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 portsD、 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.
Switch R1 has been configured with the root guard feature. What statement is true if the spanning tree enhancement Root Guard is enabled？ （）A、 If BPDUs are not received on a non-designated port， the port is moved into the STP loop- inconsistent blocked stateB、 IF BPDUs are received on a PortFast enabled port， the port is disabled.C、 If superior BPDUs are received on a designated port， the interface is placed into the root- inconsistent blocked state.D、 If inferior BPDUs are received on a root port， all blocked ports become alternate paths to the root bride.
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.
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 statement is true about loop guard？（）A、Loop guard only operates on interfaces that are considered point-to-point by the spanning tree.B、Loop guard only operates on root ports.C、Loop guard only operates on designated ports.D、Loop guard only operates on edge ports.
Which statement is true about terms in a policy?（）A、A single term can be applied to a protocol or interface, independent of the policy.B、Once configured, terms within a policy cannot be reordered.C、The name of a term is limited to five characters.D、A from statement is optional in a term.
Which statement is true about terms in a policy?（）A、A single term can be applied to a protocol or interface, independent of the policyB、Every policy must contain at least one termC、The name of a term is limited to five charactersD、Terms are optional
Which three statements are true about terms in a policy?（）A、The order of the terms in a policy is irrelevant.B、The action is specified in a then statement.C、Terms are optional in a policy.D、The match condition can be identified with a from statement.E、A from statement is mandatory in a term.
Which statement is true about IBGP routers? （）A、They must be fully meshedB、They can be in a different ASC、They must be directly connected
Which two statements are true about terms in a routing policy?（）A、A routing policy cannot have more than one term.B、If a term does not contain a from statement, all routes match.C、If a term does not contain a from statement, the Junos OS will not commit.D、A then statement is not mandatory in a term.
Which statement is true about The QoS Class Fibre Channel？（）A、 Cannot be disabledB、 Cannot have the CoS changedC、 Can have "Packet Drop" enabledD、 Is multicast optimizedE、 Can have the MTU changed
Which statement is true about the forwarding plane?（）A、It uses ASICs for increased performance.B、It is the intelligence of the platform.C、It maintains the routing tables.D、It is based on an x86 architecture.
Which two statements are true about terms in a routing policy?（）A、A then statement is mandatory in a termB、If a term does not contain a from statement, all routers matchC、If a term does not contain a from statement, the Junos OS will not commitD、A then statement is not mandatory in a term
Which statement is TRUE about the CacheFactory class ？（）A、 it is a topology agnostic way to access NamedCachesB、 it provides mechanisms to manage underlying remote data sourcesC、 both A and B are TRUED、Neither A nor B are TRUE
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 cannot.BUDLD 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 ports.DUDLD 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Which statement about VPLS is true？（）AAll CE devices emulate a bridgeBAll provider devices emulate a bridgeCHierarchical VPLS reduces signaling overheadDEach PE device emulates a bridgeEEach CE device emulates a bridge
单选题Which statement about stowing spare hose is TRUE（）.AFold the hose so that the male coupling is about 4 feet from the female coupling，then roll it upBRoll the hose starting at the female endCRoll the hose starting at the male endDFold the hose into lengths about 6 feet long and then lash the folds together
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 statement about firefighting foam is TRUE?（）AFoam conducts electricityBTo be most effective，foam should be directed at the base of the fireCFoam is most effective on burning liquids which are flowingDFoam can ONLY be used to extinguish class A fires
单选题Which statement is TRUE about the CacheFactory class ？（）A it is a topology agnostic way to access NamedCachesB it provides mechanisms to manage underlying remote data sourcesC both A and B are TRUEDNeither A nor B are TRUE
多选题Which two statements are true about terms in a routing policy?（）AA then statement is mandatory in a termBIf a term does not contain a from statement, all routers matchCIf a term does not contain a from statement, the Junos OS will not commitDA then statement is not mandatory in a term
单选题Which statement is true about IBGP routers? （）AThey must be fully meshedBThey can be in a different ASCThey must be directly connected
多选题Which three statements are true about terms in a policy?（）AThe order of the terms in a policy is irrelevant.BThe action is specified in a then statement.CTerms are optional in a policy.DThe match condition can be identified with a from statement.EA from statement is mandatory in a term.