In a scenario where a VXLAN tunnel is dynamically established through BGP EVPN, which of the following BGP EVPN routes is used to advertise MAC addresses, ARP entries, and IRB routes?

• A.Type 3
• B.Type 4
• C.Type 2
• D.Type 1

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The correct description about the prefix list is:

• A.The prefix list is used to filter IP prefixes, and cannot match both the prefix number and the prefix length
• B.The prefix list cannot be used for packet filtering
• C.The prefix list is used to filter P prefixes and can match both prefix numbers and prefix lengths
• D.The prefix list can be used to filter packets

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In an MPLS VPN network, two-layer MPLS labels are added into data packets before they are transmitted over the public network. Which of the following statements regarding data packet processing are correct?

• A.The egress PE sends the data packet to the correct VPN based on the inner label.
• B.The penultimate hop removes the outer label before forwarding the data packet to a peer egress PE.
• C.The IP data packet received by egress LSR is without labels.
• D.The penultimate-hop device receives a packet with an outer label.

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In Huawei switches, the hybird port can select vlan1 as an untagged vlan

• A.True
• B.False

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Which of the following is the drop probability of packets exceeding the upper threshold in WRED?

• A.0.2
• B.0.5
• C.1
• D.0.8

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