Which of the following statements is incorrect about Authentication Header (AH)?

• A.AH provides packet encryption.
• B.AH provides data origin authentication.
• C.AH provides anti-replay protection.
• D.AH provides data integrity authentication.

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In a scenario where a VXLAN tunnel is dynamically established through BGP EVPN, which of the following command needs to be run on the VBDIF interface to enable the VTEP peer to generate BGP EVPN Type 2 routes based on ARP information of the local terminal?

• A.mac-address xxxx-xxxx-xxxx
• B.arp-proxy enable
• C.arp collect host enable
• D.arp distribute-gateway enable

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Which of the following messages does the BGP protocol support?

• A.Keepalive
• B.Open
• C.Update
• D.Hello

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Which of the following statements about IPSG is incorrect?

• A.IPSG can be used to check the validity of IP packets. If IP packets are invalid, the device reports an alarm to an NMS.
• B.IPSG is a source IP address filtering technology based on Layer 3 interfaces.
• C.IPSG can be used to prevent hosts from changing IP addresses.
• D.IPSG can defend against IP address spoofing attacks.

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The following about the Router-LSA of OSPFv3 is correct?( Single choice questions).

• A.When LS type= Ox0001 in the head of LSA, the data area representing LSA is Router-LSA
• B.The router-LSA data area contains the Interface ID of the neighbor on this side
• C.The router-LSA data area contains the Link-Local address
• D.Similar to OSPFv2, the Option field exists in the header of LSA, not in the data area of Router-LSA

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