In Huawei's WAN solution, for " backup data transmitted across regions (such as full database backup)," which of the following technologies can "enable breakpoint resumption of backup data transmission and avoid retransmission after interruption"?

• A.Transmit only during off-peak hours at night to avoid interruptions during peak business periods.
• B.Reduce backup data transfer rate to decrease the probability of interruption.
• C.File block-based breakpoint resumption technology (records transmitted blocks and resumes from the breakpoint after interruption).
• D.Backup data is transferred completely in one go; if interrupted, it must be restarted.

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In the wide area network IPv6 transition scenario, which of the following technologies can "enable IPv6 terminals to access IPv4 network resources and solve the IPv4/IPv6 interoperability problem"?

• A.IPv6 over IPv4 GRE tunnel
• B.NAT64
• C.IPv4/IPv6 dual-stack technology
• D.Disable IPv4 protocol

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Refer to the following figure. Which of the following solutions can be used to prevent users from accessing the network using statically configured IP addresses?

• A.DAI+IPSG
• B.DHCP Snooping+IPSG
• C.DAI-Port Security
• D.DHCP Snooping+DAI

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In Huawei's SD-WAN solution, for the scenario of " multi-tenant sharing of 5G link access", which of the following technologies can "achieve 5G traffic isolation for different tenants and independently count bandwidth usage"?

• A.Traffic is segmented by tenant IP address range, without instance isolation.
• B.Create a separate VPN instance for each tenant and bind it to a 5G interface sub-interface.
• C.All tenants share the 5G link, with no isolation or independent statistics.
• D.Only total bandwidth usage is counted, without distinguishing between tenants.

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In wide area network link fault detection, which of the following technologies can achieve "rapid detection of link faults and shorten fault recovery time"? (Multiple choice)

• A.Static routes have a default timeout (timeout depends on the routing protocol, resulting in a long detection time).
• B.Manual ping testing results in delayed fault detection.
• C.No fault detection mechanism is configured; faults are discovered based on user complaints .
• D.NQA (Network Quality Analysis, periodically detecting link latency and packet loss)
• E.BFD (Bidirectional Forwarding Detection, millisecond-level detection of link status)

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