THE PROCESS A PC TAKES TO PERFORM A DAD CHECK ON THE NETWORKInternet Protocol version 6 (IPv6) provides an unlimited address space. Duplicate Address Detection (DAD) helps accommodate thousands of unique devices on a similar link (Al-Ani et al., 2019). IPv6 aims to extend and eventually replace the ability of Ipv4, handle challenges, and, importantly, secure the internet. IPv6 architectures roles are prone to security threats, including the DAD process, which is at risk of a Denial of Service (DOS) attack. DAD is implemented to ensure that IP addresses do not conflict on the same link. DAD process includes the following steps.The first step is for the PC to join a link-local all-nodes multicast group at the interface to start processing (IBM, 2011). Neighbor Discovery Protocol (NDP) is considered an essential protocol in IPv6, which does not give enough security strategy to provide verification and authentication of the packets among the hosts located on a similar link. The second step is for the PC to join a solicited-node group for the local addresses. A solicited-node multicast address is an IPv6 multicast address used by the Neighbor Discovery Protocol to validate whether a particular IPv6 address is already utilized by the local link or not through the DAD process. The third step is a neighbor solicitation is sent to the solicited-node multicast address with the tentative address for which DAD is being performed. Neighbor solicitation messages are dispatched on the local link when a node needs to find out the link-layer address of another node.The fourth step is for the PC to wait for a neighbor’s response on the interface. The hash algorithm is used to construct a mechanism utilized to achieve the required security. The hash algorithm introduces trust-option security which is attached to each NDP message. Another step is that if no neighbor response is received with a particular retransmit time, the address is considered unique on the LAN. If a response is received within a specified time, the address is not uncommon in the final step. The PC deserts the solicited-node multicast group, assigns a duplicated address detected console message, and notes the address unavailable because of a duplicate address.
ReferencesAl-Ani, A., Anbar, M., Manickam, S.,
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