Mainstream second-tier technologies include VXLAN, TRILL, NVGRE and MPLS.

• A.True
• B.False

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What benefits can be achieved after using WRED? (Multiple Choice)

• A.Thoroughly avoid congestion
• B.Can avoid UDP taking up most of the bandwidth when it is congested
• C.Provide a certain low latency
• D.Avoid TCP global synchronization
• E.Provide minimum bandwidth guarantee

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Which of the following description about the related information of BGP4+ is correct? (Multiple choice)

• A.The Next Hop attribute in BCP4+ is represented by the Pv6 address, which can be the link-local address of the next hop.
• B.Modifying the Router ID of the BCP will cause the BGP connection between the routers to be re-established.
• C.Bgp4+ can use the dampening command to suppress IBGP routes.
• D.BGP4+ does not support automatic route aggregation.

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In the MPLS-BGP-VPN environment, if the label is only distributed through BGP or LDP, the MPLS label of the packet has at most two layers of labels.

• A.False
• B.True

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RD is used to distinguish the same IP address in different VPNs. How many bits does the RD contain?

• A.32
• B.64
• C.128
• D.16

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