The correct multicast MAC address corresponding to the multicast IP address 227.120.1.32 is:

• A.01-00-5e-78-01-20
• B.01-00-5e-78-01-32
• C.01-00-5e-14-01-32
• D.01-00-5e-14-01-20

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In order to improve link reliability, the LT device configures the Time delay protection group through two uplink ports 0/19/0 and 0/20/0. Which of the following commands is optional?

• A.huawei ( config ) =protect-group 0 protect-target sth-nni port work mode time delay
• B.huawei ( protect-group-0 ) a protect-group enable
• C.huawei ( config ) #interface giu 0/ 19 huawei ( config-if-giu-0/19 ) h offline-tx-off-time0500
• D.huawei ( protect-group-0 ) h protect-group member port 0/19/0role work

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Which of the following description of GPON Type C dual-homing protection is correct?

• A.Does not support branch fiber protection.
• B.The two PON lines of one ONU and two OLTs are in the active and standby state
• C.OLT failure will cause business interruption.
• D.Simple networking, simple OLT/ONU management.

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Which of the following options is wrong in the description of NCE-FAN HSI service configuration?

• A.When querying the ONT status, if the matching status is displayed as mismatch, the services carried on the ONT cannot be communicated.
• B.For template delivery, the delivery operation execution time can be set according to business requirements.
• C.In the line template, the actual configurable range of T-CONT is determined by the capabilities of the terminal equipment.
• D.The wrong S-VLAN configuration on the service virtual port can be changed directly without deleting and rebuilding.

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Which of the following statement about Anti-MAC Spoofing is wrong?

• A.MAC Anti-MAC Spoofing feature and WAC, S+C, PPPOE SMAC feature VLA are mutual exclusion
• B.After the Anti-MAC Spoofing function is enabled, the system will automatically realize the dynamic binding between the AC address and the service flow
• C.After the Anti-MAC Spoofing function is enabled, for I PoE users who use a fixed IP, users need to be statically configured
• D.Turn off the Anti-MAC Spoofing function, the only action involved is to remove the specified entries, which will not affect the user's business applications, but the business forwarding will be interrupted.

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