1. Under the H.248 protocol, if the signaling IP and media IP are both 10.1.1.100/8 and the voice gateway is 10.1.1.1, when configuring the voIP service, which of the following command is wrong?

2. When the invitation message sent by user A reaches user B after passing through servers C, D, and E, the order of the server addresses recorded in the VIA field information in the message received by user B is?

3. Regarding multicast, which of the following descriptions is incorrect?

4. The correct multicast MAC address corresponding to the multicast IP address 227.120.1.32 is?

5. The IGMP version on the OLT is configured as V2. When the OLT receives the igmr v3 join message forwarded from the OnT, what will it do?

6. Which of the following options can improve the service experience of multicast users when switching channels (shorter switching time)?

7. A total of 100 multicast users on the OLT are watching 20 multicast programs. Assuming that each multicast program occupies a bandwidth of 2M, how much multicast traffic is currently available on the uplink port of the OLT?

8. Use OTDR to locate the position of abnormal attenuation in the optical path. After the OTDR is connected to the detected line, which of the following parameters can be set? (Multiple choices)

9. In the FTTB/C scenario, the ONU is connected to the phone as an AG device, and there is no sound when the SIP protocol is off-hook. The possible reason is?

10. A power access service deploys GPON Type C dual-homing protection, and the state of the protection group and the uplink Ethernet port is determined on the OLT. When the state of the Ethernet port associated with the protection group on the OLT changes to down, which of the following descriptions is incorrect?

11. When deploying GPON Type C single-homing protection, which of the following descriptions is correct?

12. The device will periodically send and receive LMCP messages to avoid information loss. If no messages are received within () LACP message interaction periods, the system will consider the port to be faulty.

13. The protection scope of GP ON Type B dual-homing protection includes? (Multiple choice)

14. When the main fiber is broken or the OLT cannot detect the expected optical signal (LOS) alarm, the possible reason is? (Multiple choice)

15. Which of the following statements about SSH connection is incorrect?

16. When the PIT P switch is enabled globally or in the VLAN service template of the OLT, the service virtual port is allowed to carry upstream packets, the Vendor tag is switched, and the user upstream packets carry Vendor tarf information, which of the following about the OLT processing strategy of PITP message is correct?

17. In order to prevent network monitoring in the GPON system, the most commonly used method is?

18. Which of the following statements about defending against MAC Spoofing is incorrect?

19. When deploying home-customer services in the PON system, which of the following service configurations has the highest priority?

20. Which of the following is not a QOS service model?

21. esight is a network management software located in the enterprise network scenario, which can view the detailed information of the onu device, including which of the following information? (Multiple choice)

22. When configuring the IPTV service on the U2000, what templates are included in the IGMP template? (Multiple choice)

23. Which of the following templates needs to be configured when Huawei network management U2000 configures FTTH IPTV service access?

24. The effective downstream bandwidth of the GPON PON port is?

25. Which of the following measures can GPON adopt in terms of flow control? (Multiple choice)