In Huawei's wide area network solution, for "low-latency services transmitted across regions (such as high-frequency transaction data)," which of the following technologies can "guarantee service transmission latency <50ms"?

• A.Business data is transmitted in parallel across multiple links, increasing latency fluctuations.
• B.Use a regular internet link for transmission, without latency optimization.
• C.Reduce service transmission rate and decrease latency.
• D.SD-WAN low-latency leased line technology (select low-latency links and disable unnecessary protocol overhead)

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In Huawei's WAN solution, for the scenario of "frequent brief interruptions in WAN links", which of the following technologies can "reduce the impact of interruptions on services and achieve rapid service recovery"?

• A.Fast rerouting technology based on BFD (millisecond-level switch to backup path in case of interruption)
• B.Ignore the link interruption and do nothing.
• C.All services use a single link, with no backup path.
• D.Switchover is triggered based on the default timeout of the routing protocol (e.g., OSPF dead timeout of 40 seconds).

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In Huawei's WAN bandwidth management solution, which of the following functions can "limit bandwidth usage by different departments beyond their limits, such as limiting the speed to
10Mbps after exceeding the quota"?

• A.Only set bandwidth quotas; disconnect the network immediately after exceeding the quota.
• B.All departments share bandwidth, with no quotas or speed limits.
• C.Bandwidth is set by user, without distinction by department.
• D.Department-based bandwidth quotas and over-limit policies

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In Huawei's WAN management platform, which of the following functions can "set bandwidth usage threshold alarms (such as alarms when bandwidth utilization exceeds 80%) to promptly detect bandwidth overload"?

• A.Bandwidth usage statistics report
• B.Bandwidth threshold alarms and monitoring
• C.Bandwidth quota allocation
• D.Applying traffic shaping

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In an MPLS VPN network, which of the following faults will cause "the PE device to be unable to encapsulate public network labels for VPN packets"?

• A.The MPLS LDP protocol is enabled on the PE device, and a neighbor relationship has been established with the P device.
• B.The VPN instance has been correctly created and the interface bound on the PE device.
• C.The MPLS LSP between the PE device and the P device has not been established.
• D.BGP VPNv4 neighbor between PE devices is established normally.

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