In PIM-SM, which of the following descriptions of the PIM Join message is correct?

• A.The PIM Join message is sent every 60 seconds to refresh the status of the upstream router mroute for the multicast tree
• B.The upstream router sends a PIM Join confirmation in response to each PIM Join message received from the downstream router
• C.The PIM Join message is only sent when the multicast tree is established for the first time
• D.The PIM Join message is sent every 3 minutes to show the status of the new upstream router mroute for the multicast tree

Comment: *

Name: *

Email: *

Verification: *

As shown in the following figure, R1 and R2 establish the neighbor relationship of Level2. Which of the following statement about the R3 route entry is correct? (Multiple choice)

• A.2022::/64 router will appear in the IP routing table.
• B.2019::/64 router will appear in the IP routing table.
• C.2020::/64 router will appear in the IP routing table.
• D.2021::/64 router will appear in the IP routing table.

Comment: *

Name: *

Email: *

Verification: *

There are 4 port colors defined in RSTP. The port role values in the flags field of the RSTP packet for the A1 ternative port and the Backup port are the same, and they are all 0101 Alternate/Backup port10 Root port11 Designated port.

• A.TURE
• B.FALSE

Comment: *

Name: *

Email: *

Verification: *

What are the comparison items of the main switch election in the stack? (Multiple questions)

• A.Stack ID
• B.MAC address
• C.Stacking priority
• D.Running status

Comment: *

Name: *

Email: *

Verification: *

Single selection After configuring the VLAN-based MAC address drift detection function, if the MAC address drifts, you can configure the actions of the interface according to your needs.
Which of the following is not a configurable action?

• A.Flow filtering
• B.Send alert
• C.Interface blocking
• D.MAC address blocking

Comment: *

Name: *

Email: *

Verification: *