1. Port security is achieved by converting the dynamic MAC address learned by the interface into a secure MAC address, including secure dynamic MAC, secure static MAC and sticky MAC. Which of the following descriptions about secure MAC addresses are correct? (Multiple choice)

2. Which of the following commands can be configured on an IS-IS Level-1-2 device to prevent the Level-1 device from generating a default route?

3. A large Internet service provider needs to shut down the equipment in the computer room for maintenance in batches. As a cutover project manager, which of the following time points would you prefer?

4. The MPLS architecture is divided into a control plane and a forwarding plane, which contains multiple protocols and tables. Which of the following tables is responsible for forwarding packets with MPLS labels?

5. When the administrator enables the MPLS LDP function of the device, which of the following commands must be configured first?

6. With the increase of business traffic, an enterprise needs to expand the backbone network transmission bandwidth. Which of the following methods can best meet this demand?

7. Which of the following descriptions about OSPFv3 are correct? (Multiple choice)

8. In a BGP/MPLS IP VPN network, when a PE device advertises VPNv4 routes, which of the following information will it carry? (Multiple choice)

9. With the increase of business traffic, an enterprise needs to expand the dedicated transmission bandwidth of the backbone network. Which of the following methods can best meet this demand?

10. Which of the following descriptions about OSPFv3 Link-LSA and Intra-Area-Prefix-LSA are correct? (Multiple choice)

11. NetEngine AR can assign DHCP addresses to clients in the same network segment or different network segments from the router as a DHCP server.
Which of the following reasons will not cause the client to be unable to obtain the correct address?

12. The flexible QinQ function can add different outer tags according to different inner messages. Which of the following descriptions about the tag addition of flexible QinQ is wrong?

13. The concepts of RD and RT are introduced in BGP/MPLS IP VPN network. Which of the following descriptions about RD and RT are wrong? (Multiple choice)

14. The three devices in the MPLS network have successfully established an LDP session. At this time, which of the following information does the administrator configure or modify to cause the local LDP session to be reestablished? (Multiple choice)

15. Which of the following is not included in the OSPF Hello message?

16. When VPN traffic is transmitted in a typical BGP/MPLS IP VPN network, it usually contains two layers of labels. Which of the following descriptions about these two layers of labels are wrong? (Multiple choice)

17. In an HPLS network, when a transit device receives an MPLS message and prepares to perform label switching, it finds that the label value after switching is 0. Which of the following operations will it perform?

18. If the technical migration actions performed on the network will affect the existing network operations, the pre-set operating procedures and risk control measures must be strictly followed when implementing the technical migration project. Such projects are generally defined as cutover projects.
Which of the following operations performed in the existing network is a non-cutover item?

19. The configuration of a switch interface is as follows. When the average rate of broadcast packets received by the interface reaches which of the following items, storm control action will be executed? (Multiple choice)
[SW1] system-view
[SW1] interface gigabitethernet 0/0/1
[SW1-GigabitEthernet0/0/1] storm-control broadcast min-rate 5000 max-rate 8000

20. In a BGP/MPLS IP VPN network, when which of the following routing protocols is running between CE and PE, the device can perform route redistribution operations without BGP?

21. When the administrator enters the command label advertise explicit-null on the egress device in the MPLS network, which of the following labels is assigned to the penultimate hop device?

22. Network engineers found that the multicast client could not receive multicast data correctly, so they suspected that the group address set by the multicast server was wrong. Which of the following cannot be the group address?

23. An MPLS label is a 20-bit local identifier. Its label space is divided into special labels, static shared label space, and dynamic signaling protocol label space. Which of the following are dynamic signaling protocol labels? (Multiple choice)

24. The normal operation environment of the equipment is the prerequisite for ensuring the normal operation of the equipment. When checking the equipment operation environment, which of the following items need to be checked? (Multiple choice)

25. In a BGP/MPLS IP VPN network, the configuration of some PE options is to update VPN routes through Update messages. Which of the following information will be included in the Update message? (Multiple choice)

26. A network engineer enters "dir" on the device and obtains the following file names. Which of the following is most likely to be the version file of the device?

27. As the scale of enterprise network continues to expand, a certain enterprise plans to move the dispersed servers to the same computer room for unified management. At a certain stage of the relocation, the work content is hardware relocation. At this stage, network engineers do not need to perform equipment commissioning, so network engineers do not need to formulate a cutover plan.

28. The information generated by the device can be output to the console, remote terminal, log buffer, log file, SNMP agent, etc. By default, which of the following output directions can receive Trap information? (Multiple choice)

29. When Huawei NetEngine AR series router logs in to FTP server as FTP client (all permissions are enabled on FTP server), which of the following operations can be performed? (Multiple choice)

30. The display startup command can be used to view the system software and configuration files related to the current and next startup of the device, and to see the save paths of these files.

31. An MPLS label is a 20-bit local identifier. Its label space is divided into special labels, static shared label space, and dynamic signaling protocol label space. Which of the following are special labels? (Multiple choice)

32. When an IP packet enters the MPLS domain, the ingress node checks the Tunnel ID corresponding to the destination IP address. When the Tunnel ID is one of the following, the ingress node performs IP forwarding on the packet?

33. ULA aggregation can be implemented within a physical network by isolating broadcast domains with multiple Sub-LANs and aggregating these Sub-LANs into a logical Super-LAN.
Which of the following descriptions about WAN combinations is correct?