In MPLS VPN network troubleshooting, if "the CE device cannot ping the remote CE device, but can ping the local PE device " , which of the following troubleshooting steps should be performed first?

• A.Check if an MPLS LSP has been established between the local PE device and the remote PE device.
• B.Check if the network card of the CE device is working properly.
• C.Check if the CPU usage of the local PE device is too high.
• D.Check if the operating system of the CE device is running normally.

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In Huawei's WAN solution, which of the following technologies can "continue the file transfer from the point of interruption without retransmitting the entire file"?

• A.Transmission encryption technology
• B.Bandwidth adaptive technology
• C.Resumable download technology
• D.Data compression technology

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In Huawei's WAN bandwidth management solution, which of the following functions can
"differentiate the control of bandwidth usage at different times, such as ensuring ERP bandwidth during working hours and allowing P2P downloads during non-working hours"?

• A.Time-based bandwidth control strategy (adjusting bandwidth quotas according to time periods)
• B.Disable network access outside of working hours to avoid wasting bandwidth.
• C.Bandwidth is controlled only during working hours; there is no control outside of working hours.
• D.The same bandwidth control strategy is used for all time periods.

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In an MPLS VPN network, which of the following descriptions conforms to the forwarding logic of
"public network label (outer label)"?

• A.Assigned by the P device according to the routing table, used for backbone network forwarding path identification.
• B.Assigned by the PE device to identify the VPN instance to which the data packet belongs.
• C.Assigned by the PE device according to the MPLS LDP protocol, for forwarding between P devices.
• D.Assigned by the CE device to identify the VPN service type.

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When BGP protocol is deployed in a wide area network, which of the following measures can enhance the stability and security of the BGP network? (Multiple choice)

• A.Enable BGP loop prevention mechanisms (such as AS_PATH loop prevention, IBGP horizontal splitting).
• B.Without configuring neighbor authentication, allowing any device to establish BGP neighbors.
• C.Disable BGP loop prevention mechanism and simplify configuration process .
• D.Deploy BGP route aggregation (reduces routing table entries and lowers device load).
• E.Configure BGP neighbor authentication (such as MD5 key authentication to prevent fake neighbors from accessing the network).

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