A.Costs

B.Feasibility

C.Risks

D.Necessity

A.Determining and analysis

B.Information collection

C.Service traffic path check

D.Top-down

A.The device time should be consistent with the actual time (time difference < 24 hours) so that a fault can be accurately located based on the occurrence time.

B.You can run the display patch-information command to check patch information.

C.You can run the display current-configuration command to check the PCB version and the software version of a card.

D.The debugging functions can be enabled when the device is running properly.

A.For non-DR and non-BDR routers on an Ethernet link, the 2-Way state is acceptable.

B.The Attempt state indicates that the router does not send unicast Hello packets to configured neighbors.

C.The ExStart state indicates that two neighbor routers have inconsistent MTUs or the same OSPF Router ID (RID).

D.The Init state indicates that the router has received Hello packets from its neighbors but the received Hello packets do not contain the OSPF RID of the receiving router.

A.The link where VRRP Advertisement packets are transmitted is faulty.

B.The configurations of the devices in the VRRP group are different.

C.The VRRP Advertisement packets received by the VRRP backup group with a lower priority are taken as invalid packets and are discarded.

D.The master device sends a VRRP Advertisement packet every 1 second.