1. What is the command to configure VRRP preemption delay?

2. It is necessary to elect a DR between multicast routers running PIM-SM to be responsible for sending and receiving multicast data at the source or member side. Which one of the following descriptions of the DR election rules is correct?

3. In an MPLS VPN network, when a data packet enters the public and is forwarded, it will be encapsulated with two layers of MPLS labels. Which of the following options describes the processing procedure of the data packet correctly? (Multiple Choice)

4. The correct description in the following of BGP loop protection is: (Multiple Choice)

5. In the OSPF broadcast network, there are 4 routers RTA, RTB, RTC, and RTD in the same network segment. The DR priorities are 2, 1, 1, and 0 respectively, and the router IDs are 192.168.1.1 and 192.168.2.1, 192.168.3.1 and 1924.1 respectively.
If the OSPF protocol is enabled on the 4 routers at the same time, the BDR selected by OSPF is _____.

6. Regarding the stub area and NSSA area of the OSPF protocol, which of the following statements are wrong?

7. If the Sticky MAC function of the interface is enabled, what is the number of MAC addresses learned by the interface by default?

8. Which of the following are the advantages of VLAN aggregation? (Multiple Choice)

9. The filter policy 2000 export is configured in the IS-IS process. Which of the following is wrong about the function of this command?

10. In route-policy, what are the BGP attributes that can be used in the apply clause? (Multiple Choice)

11. IS-IS supports the process and calculation of IPv6 routes by adding new TLV carrying IPv6 addresses and reachability information.

12. There can be multiple nodes under a route-policy. Different node numbers are identified by node. Each node can have multiple if-match and apply clauses. Which of the following descriptions are wrong? (Multiple Choice)

13. The correct description of the prefix list is: (Multiple Choice)

14. What is LSA for the flooding scope of the entire autonomous system in the OSPFv3?

15. When running OSPFv3 on a Huawei router, the OSPFv3 process will automatically select an interface address as the Router ID of the process.

16. The DHCPv6 server supports to provid the host with other configuration information such as the DNS server address.

17. In MPLS VPN, in order to distinguish IPv4 prefixes that use the same address space, the RD value is added to the IPv4 address. Which of the following description is correct? (Multiple Choice)

18. Which of the following statement about the static LSP configuration in the MPLS network is wrong?

19. What kind of packets can Huawei equipment perform traffic suppression for? (Multiple Choice)

20. Regarding the basic forwarding process of MPL S, which of the following statement is wrong?

21. Network managers can use CAR technology in traffic monitoring.
Which of the following technologies can be applied in CAR? (Multiple Choice)

22. Which of the following types of routes is used for advertising external routes in BGP EVPN?

23. There is a new HW office that needs to use their router as a DHCP server.
When configuring the DHCP server to provide DHCP services for the current office, which of the following items need to be configured? (Multiple Choice)

24. A routing tool can define multiple entries.
Which tool will automatically add a deny-any entry at the end of the configuration? (Multiple Choice)

25. Which of the following statements about inter-domain MPLS VPN is wrong? (Multiple Choice)