A.When a certain LSR is an Egress LSR, only In Labe1 needs to be configured, the range is 16~1023

B.When an LSR is an Ingress LSR, only Out Label needs to be configured, ranging from 16 to 1048575

C.When a certain LSR is a Transit LSR, In Labe1 and Out labe1 need to be configured at the same time, the range of In Labe1 is 16~1023, and the range of Out Labe1 is 16~1048575

D.When a certain LSR is a Transit LSR, In Labe1 and 0ut Label need to be configured at the same time, the range is 16~1023

A.Port isolation is configured on the switch

B.Switch MAC address learning error

C.The interface is manually shut down or the physical interface is damaged

D.Wrong port and MAC address binding is configured on the switch

A.The receiving and emitting power of both ends is inconsistent

B.The duplex modes of the interfaces on both ends are inconsistent

C.Inconsistent interface authentication

D.IP address conflict

A.Sub-VLAN is used to isolate the broadcast domain

B.Sub-VLAN contains physical interfaces. A three-layer VLANIF interface can be established

C.Super-VLAN only contains physical interfaces and cannot establish a Layer 3 VLANIF interface

D.A Super-VLAN can contain one or more SUb-VLANs

A.R2 only generates Router LSA in area 0

B.R2 forwards the Router LSA generated by R3 to R1

C.R2 forwards the Router LSA generated by R1 to R3

D.R2 generates Router LSA in both area 1 and area 0