1. After the RPT tree is established, which of the following about the description of the SPT switch is wrong?

2. The scale of a certain network is relatively large, some switches run MSTP, and the other part runs RSTP. When a switch running MSTP protocol detects that the switch adjacent to the port is running in RSTP mode, what mode does the MSTP protocol switch work in at this time?

3. Which of the following description of the special area of OSPF is wrong?

4. Which of the following is not the basic network type defined by OSPF?

5. Which command can be used to view OSPF neighbor status information?

6. According to RFC 2328, with regard to a router running OSPF, the correct description of the process from the beginning to the formation of an adjacency relationship with its neighbors is:

7. The following protocol using SPF algorithm is:

8. Regarding the Register message, which of the following statement is wrong?

9. Which of the following about the description of the BGP state machine is wrong?

10. Which of the following description about the characteristics of the prefix list is wrong?

11. Which of the following description of AS-PATH is wrong?

12. Regarding port isolation, which of the following statement is wrong?

13. In different scenarios, RSTP provides different protection functions. What is correct about this statement?

14. The use of the access control list is specified by the range of numbers. Which of the following description is wrong?

15. In the static LACP mode, the active interfaces selected by the devices at both ends must be consistent, otherwise the link aggregation group cannot be established. But you can specify the true end as the active end, and the other end only needs to select the corresponding active interface according to the high-priority end.
So how to choose the active end in static LACP mode?

16. Which of the following description of the rules for routing filtering is wrong?

17. What is the correct description of the OSPF calculation shortest path tree stage?

18. Regarding the description of the Hello message in PIM-SM, the error is:

19. What is the role of the DETAIL-SUPPRESSED option of the AGGREATE command?

20. Which one of the following tools is used to filter routing information and set routing attributes for the routing information that passes the filter?

21. In the IS-IS broadcast network, which multicast MAC address does the Level-1 router use as the destination address for sending IIH?

22. Which of the following descriptions about LSA3, LSA4 and LSA5 are correct?

23. In the BGP routing rules, the priority judgment principle for the ORIGIN attribute is:

24. In the IS-IS broadcast network, which multicast MAC address does the Level-2 router use as the destination address for sending IIH?

25. Which of the following description is wrong about verifying whether a received HELLO message is legal?