What must a client do after generating an IPv6 address using SLAAC before using it on the network?

What must a client do after generating an IPv6 address using SLAAC before using it on the network?

• A. Contact the DNS server to register the address
• B. Send an ICMPv6 Neighbor Solicitation message to verify address uniqueness
• C. Update the routing tables to include the new address
• D. Reboot the interface to apply the changes

Answer: (B)

When a client generates an IPv6 address using Stateless Address Autoconfiguration (SLAAC), it must ensure that the address is unique on the local link before using it. This process is crucial to avoid address conflicts that could disrupt network communication. The client sends an ICMPv6 Neighbor Solicitation message to the solicited-node multicast address derived from its own IPv6 address. By doing this, the client solicits a response from any device that might already be using that address on the network. If another device is using the address, it will respond with a Neighbor Advertisement message, indicating that the address is already in use. If the client receives no response, it can safely assume that the address is unique and can proceed to use it on the network. This step of verifying uniqueness is a fundamental aspect of using SLAAC for IPv6 address assignment.

When a client generates an IPv6 address using Stateless Address Autoconfiguration (SLAAC), it must ensure that the address is unique on the local link before using it. This process is crucial to avoid address conflicts that could disrupt network communication. The client sends an ICMPv6 Neighbor Solicitation message to the solicited-node multicast address derived from its own IPv6 address. By doing this, the client solicits a response from any device that might already be using that address on the network.

If another device is using the address, it will respond with a Neighbor Advertisement message, indicating that the address is already in use. If the client receives no response, it can safely assume that the address is unique and can proceed to use it on the network. This step of verifying uniqueness is a fundamental aspect of using SLAAC for IPv6 address assignment.