Is the following statement about VLAN aggregation correct?

• A.Sub-VLAN contains a physical interface that can establish a Layer 3 VLANIF interface
• B.A Super VLAN can contain one or more Sub-VLANs
• C.Sub-VLAN is used to isolate broadcast domains
• D.The super Sub-VLAN contains a physical interface that can establish a Layer 3 VLANIF interface

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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 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 powered off and restarted, and when the network converges again, R3 is DR

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The Option field in OSPFv3 appears in all LSAs

• A.False
• B.True

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Traditional BGP-4 can only manage IP4 unicast routing information, and MP-BGP extends BGP-4 to provide support for multiple network layer protocols. Among them, MP-BGP's support feature for IPv6 unicast networks is called BGP4+, BGP4+ via NextHop. The route next hop address information is carried by the attribute.

• A.FALSE
• B.TRUE

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If the Interface Sticky MAC function is enabled, what is the number of MAC addresses that the interface learns by default?

• A.10
• B.15
• C.5
• D.1

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