The following statement about cross-domain MPLS VPN, which is wrong? (Multiple Choice)

• A.For the cross-domain vPN-OptionB mode, two ASBR are interconnected by multiple interfaces (including sub-interfaces). Each interface is associated with one VPN. Each ASBR-PE uses the peer as the CE.
• B.For the cross-domain vPn-OptionA mode, the route between the two ASBR is a common IPv4 route.
• C.For the cross-domain vPN-Option B mode, an MP-eBGP neighbor relationship needs to be established between the two ASBR.
• D.When the public network label only use LDP, for the cross-domain vp-Option-c scheme 2, three-layer labels are required for packet forwarding.

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The following is about the LDP protocol session establishment process, which is the correct description?

• A.After both parties receive the Keepalive message from the peer, the LDP session is established successfully.
• B.The Hello message discovered by the LDP neighbor uses TCP packets. The destination address is the multicast address 224.0.0.2.
• C.The party with the larger transmission address acts as the active party and initiates the establishment of TCP connection.
• D.After the TCP connection is successfully established, the active party sends an initialization message to negotiate the parameters related to the LDP session.

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If the topology of the entire network does not change, only the IP network segment allocation in the router changes, ISIS only uses the PRC to calculate the changed routing information, and does not recalculate the SPT.

• A.False
• B.True

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Which of the following configurations of OSPFV3 route aggregation are correct? (Multiple Choice)

• A.[Huawei] ospfv3 1 [Huawei-ospfv3-1] abr-summary 48 cost 400
• B.[Huawei] ospf3 1 [Huawei-ospfv3-1] area 1 [Huawei-ospfv3-1-area-0.0.0.1] abr-summary fc00:0:0:: 48 cost 400
• C.[Huawei-ospfv3-1-area-0.0.0.1] asbr-summary fc00:0:0::48 cost 20 tag 100 [Huawei]interface gigabitether 1/0/0 [Huawei-GigabitEthernet1 /0/0) asbr-summary fc00:0:0::48 cost 20
• D.[Huawei] ospfv3 1 [Huawei-ospfv3-1] asbr-summary 48 cost 20 tag 100
• E.[Huawei] ospfv3 1 [Huawei-ospfv3-1] area 1

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For the Layer 2 VPN technology, which of the following statement is correct? (Multiple choice)

• A.BGP EVPN solves the problem of MAC address drift and multi-tenancy that VPLS cannot support.
• B.BGP EVPN supports tenant isolation, multi-homing and broadcast suppression
• C.The VPLS configuration is highly complex. The Layer 2 network transparently transmits BUM packets.
• D.VPLS is a widely used technology on the live network. It can provide Layer 3 packet transparent transmission and achieve multi-point access.

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