In addition to stateless address autoconfiguration, IPv6 devices can also obtain information such as address, gateway and DNS through DHCPv6.

• A.False
• B.True

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Which of the following statements about VXLAN messages is correct? (Multiple Choice)

• A.Destination UDP port number is 4789
• B.The outer destination IP address is the IP address of the remote VTEP of the VXLAN tunnel.
• C.The source UDP port number is 4789
• D.VNI has 24 bits and used to distinguish VLAN segments.

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The following statement about cross-domain MPLS VPN, which is the wrong description?

• 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-OptionB mode, an MP-eBGP neighbor relationship needs to be established between the two ASBR.
• D.When the public network label is only LDP, the cross-domain vp-Option-c scheme 2 needs to use three-layer labels in the packet forwarding process.

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The following is about the RD attribute filter of BGP, what is the correct description? (Multiple Choice)

• A.If RD-filter is configured, but the RD of the route does not match any of the RDs defined in the rule, the default match result is Permit.
• B.Matching multiple rules in the order of configuration
• C.If RD-filter is not configured, but this RD-filter is used for filtering, the matching result is deny.
• D.The relationship between the rules configured by RD-filter is "or"

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Regarding the BGP alliance, which is wrong description?

• A.The sub-autonomous system within the federation can use a private AS number. A Huawei NE/AR router can be configured with up to 32 sub-AS in a single alliance.
• B.The Alliance divides an AS into several sub-AS alliances. External As still considers the Alliance to be an AS.
• C.The federation can easily detect the routing loop within the AS because EBGP is running between the sub-AS.
• D.The sub-AS number of the confederation is advertised to BGP peers outside the confederation by default.

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