OSPFV is the GP running on the P4 network) OSPF3 is the KGP running on the IP6 network. OsPFV works the same basic way as OSPF2, such as elections for DR and BDR. As shown in the figure, an engineer uses three routers for IP6 service testing, and he wants to interconnect the IPv6 network by running OSPFv3 Which of the following statements is correct regarding the election of the network DR?

• A.After the network converges, R1 is powered off and restarted, and when the network converges again, R3 is DR
• B.After the network converges, the engineer modifies the priority of R1 to 100, the priority of R2 to 10, and R3 to the default value. When the network converges again, Rl is DR and R2 is BDR
• C.After the network converges, the broadcast link adds a device, R4, with a priority of 150 When the network converges again, R4 is DR
• D.After the network converges, R1 is DR

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What is the correct description of the scene shown in the following figure?

• A.There is no neighbor relationship between R1 and R2
• B.R1 has a route to R2 loopback 010022/32
• C.R1 can ping the interface address of R2 loopback 0
• D.R1 simultaneously exists level-1 and Level-2 LSDB

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Which of the following user logout modes are supported by 802.1X authentication?

• A.An authentication server forces a user to log out.
• B.A user logs out manually.
• C.An access device forces a user to log out.
• D.An accounting server forces a user to log out.

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In inter-domain packet filtering, which of the following options belongs to the outbound direction?

• A.untrust--> dmz
• B.trust -->Local
• C.trust--> untrust
• D.untrust--> trust

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In an MPLSVPN network, when a packet enters the Internet and is forwarded, it is encapsulated with two layers of MPLS tags, and the processing of the packet in the following options is described correctly?

• A.based on the inner tag The packet pops up the outer label on the penultimate hop device and forwards it to the Egress PE device
• B.The Egress PE appliance receives an UNlabeled IP packet
• C.The penultimate hop device receives packets with an outer label of 3
• D.The Egress PE device correctly sends packets to the appropriate VPN

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