(If the number of MAC addresses learned on an interface enabled with port security reaches the upper limit, which of the following actions may the switch take?)

• A.Sets the interface state to error-down and generates an alarm.
• B.Sets the interface state to error-down without generating any alarm.
• C.Discards packets with unknown source MAC addresses without generating any alarm.
• D.Discards packets with unknown source MAC addresses and generates an alarm.

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In an MPLS VPN network, which of the following failures would cause "PE devices to be unable to advertise VPNv4 routes to other PE devices"?

• A.The CE route has been imported into the BGP VPNv4 address family on the PE device.
• B.BGP VPNv4 neighbor relationships between PE devices have not been established.
• C.OSPF neighbor between PE device and CE device is established normally.
• D.The VPN instance and interface are correctly bound on the PE device.

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In Huawei's WAN bandwidth optimization solution, for "incremental data backup of databases transmitted across regions," which of the following technologies can "transmit only newly added or changed data blocks, reducing the amount of data transmitted"?

• A.Transfer complete database backup files, without distinguishing between incremental and full backups.
• B.Database incremental backup data block-level transfer technology (transfers only changed data blocks)
• C.Reduce the frequency of incremental data transmission and transmit it all at once after accumulation.
• D.Compress the complete backup file before transferring it; this will not reduce the number of data blocks.

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In Huawei's WAN bandwidth optimization solution, for "log data transmitted across regions (such as ELK logs)," which of the following technologies can "reduce the amount of log transmission and improve transmission efficiency"?

• A.Transmit raw log data directly without any optimization.
• B.Log data compression and structuring (removing redundant fields and compressing log volume)
• C.Increase the frequency of log sending to ensure data real-time performance.
• D.Relying solely on link bandwidth expansion without optimizing log format.

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In Huawei's WAN bandwidth optimization solution, for "real-time collaboration tool traffic transmitted across regions (such as Teams, Zoom)," which of the following technologies can
"ensure the smoothness of real-time voice/video and reduce lag"?

• A.All real-time traffic is relayed through headquarters, increasing latency.
• B.Limit real-time bandwidth and prioritize file transfer.
• C.Transmit traffic directly without any optimization.
• D.Application protocol-based acceleration technologies (such as optimizing the Real-time Transport Protocol, RTP)

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