1. Among the following options, the technologies that do not belong to the OVERLAY VPN model are:

2. To realize all interfaces of the device, the command to enable the linkage function between BFD and OSPF is:

3. The command to configure the linkage between BFD and static default route is:

4. Regarding the description of the MAC address spoofing attack, which of the following is wrong?

5. Man-in-the-middle attacks or IP/MAC spoofing attacks can cause information leakage and other hazards, and they are more common in intranets.
In order to prevent man-in-the-middle attacks or IP/MAC spoofing attacks, the configuration methods that can be taken are:

6. Regarding the description of the LDP Session establishment process, which of the following is correct? (Multiple Choice)

7. In response to different needs, the DHCP server supports multiple types of address allocation strategies, not including:

8. Which common configuration methods does VXLAN support? (Multiple Choice)

9. The remote alarm notification methods supported by Esight network management include: (Multiple Choice)

10. In inter-domain packet filtering, which of the following options belongs to the outbound direction?

11. The three elements of the Servermap table of the USG series firewalls do not include:

12. The role of the Agile Controller server does not include which of the following options?

13. Which of the following modules is not a functional component within the NFV framework?

14. ASPF (Application Specific Packet Filter) is a packet filter based on the application layer. It checks the application layer protocol information and monitors the connected application layer protocol status, and implements a special security mechanism through the Server MAP table.
Regarding the statement about ASPF and Server map table, which of the following is wrong?

15. The dynamic IP address assigned by the DHCP server to the client usually has a certain lease period, so regarding the description of the lease period, which of the following is wrong?

16. Which of the following is the command to configure the listening address of the SDN controller?

17. In order to avoid the TCP global synchronization phenomenon, the congestion avoidance mechanisms that can be used are: (Multiple Choice)

18. The main technical genres of SDN advocate that SDN adopts a layered open architecture, so what is used to advocate, define a centralized architecture and Openflow?

19. Among the following application scenarios, the one that does not belong to the guest access management of the Agile controller is:

20. Among the following options, the highlight of the service orchestration of the Agile controller is: (Multiple Choice)

21. The traditional packet loss strategy adopts the tail-drop method, which will cause the TCP global synchronization phenomenon.

22. The main functions of the VIM management module in NFV include resource discovery, resource allocation, resource management and _______ .

23. In the IP message, the Tos field is used to mark the Qos, and the first 6 bits are used to mark the DSCP in the Tos field.

24. NFV is often deployed in which of the following application environments? (Multiple Choice)

25. Stream mirroring is divided into two modes: local stream mirroring and remote stream mirroring.