As shown in the figure, RTA uses NAT technology and realizes multiple-to-multiple NAPT address translation by defining an address pool, so that hosts in the private network can access the public network. Suppose that there are only two public IP addresses in the address pool, and they have been assigned to hosts A and B for address conversion, and if host C also wants to access the public network, which of the following description is correct?

• A.RTA assigns the interface address (200.10.10.3) to host C, host C can access the public network
• B.Host C cannot be assigned a public network address and cannot access the public network
• C.RTA converts the source port of host C, and host C can access the public network
• D.All hosts can access the public network by using the public network address in turn

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The DHCPv6 server supports providing other configuration information such as DNS server address for the host.

• A.True
• B.False

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Which OSPF version below is suitable for IPv6?

• A.OSPFv4
• B.OSPFv3
• C.OSPFv2
• D.OSPFv1

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Which of the following port states does the RSTP protocol include? (Multiple choice)

• A.Forwarding
• B.Listening
• C.Learning
• D.Discarding

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What is the number range of the Layer 2 ACL?

• A.3000-3999
• B.4000 ～ 4999
• C.2000-2999
• D.6000 ～ 6031

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