Regarding the role of ping and tracert, which of the following statements is correct?

• A.Ping verifies the reachability from the local end to the opposite end, it does not mean that the opposite end is always reachable to the local end
• B.Ping detects the two-way reachability between the correct end and the one-way icmp echo request packet
• C.Tracert has the same function as ping, but the name is different
• D.Tracert must be able to trace every hop IP address from source to destination

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Regarding BGP/MPLS IPVPN data forwarding, which of the following descriptions is wrong?

• A.The inner label when data is forwarded is defined byMP-BGPdistribute
• B.data inB, CP/MPLS IP VPNWhen the backbone network is transmitted, it always carries two layers of labels
• C.PEsend toCEThe data isIPv4Genuine
• D.The outer layer label when data is forwarded can beLDPdistribute

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In BGP/MPLS IP VPN, the OSPF multi-instance process uses the DN bit to prevent Type5 LSA loops.

• A.TRUE
• B.FALSE

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As shown in the figure, MPLS/BGP IPVPN is deployed on the network.
The MP-BGP neighbor relationship is established between PE1 and PE2 through the LoopbackD interface.
After the configuration is complete, it is found that CE1 and CE2 cannot learn routes from each other.
Run the command to check the error on PE2.
The neighbor information is shown in the figure, what is the most likely cause of the problem?

• A.PE1orPE2± of VPN Instance parameter configuration error
• B.PE1andPE2 not present BGP-VPN4 Enabling neighbors in unicast address family view
• C.PE1andPE2 between LSPTunnel not established
• D.PE1orPE2 with each other CEMisconfigu red routing protocol between

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The link status information between different S.4S processes of the routers around the Taiwan and Taiwan is considered to be sound insulation.

• A.True
• B.False

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