多项选择题
Which two statements correctly describe UDLD？ （）
A.Unidirectional link detection is achieved through monitoring STP BPDUs.
B.It is recommended that it be enabled globally rather than on an individual port.
C.When an error is detected， normal mode will disable a port.
D.It is recommended that it be enabled in normal mode.
E.It is recommended that it be used with the loop guard feature.
相关考题
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单项选择题
WhichstatementcorrectlydescribesenablingBPDUguardonanaccessportthatisalsoenabledforPortFast？（）
A.Upon startup， the port transmits 10 BPDUs. If the port receives a BPDU， PortFast and BPDU guard are disabled on that port and it assumes normal STP operation.
B.The access port ignores any received BPDU.
C.If the port receives a BPDU， it is placed into the error-disable state.
D.BPDU guard is only configured globally and the BPDU filter is required for port-level configuration. -
多项选择题
WhichtwostatementscorrectlydescribecharacteristicsofthePortFastfeature？（）
A.STP will be disabled on the port.
B.PortFast can also be configured on trunk ports.
C.PortFast is required to enable port-based BPDU guard.
D.PortFast is used for both STP and RSTP host ports.
E.PortFast is used for STP-only host ports. -
多项选择题
WhichtwoRSTPportrolesincludetheportaspartoftheactivetopology？（）
A.root
B.designated
C.alternate
D.backup
E.forwarding
F.learning
