In MIPv6, the mobile node IP address is generated by using Stateless IP address auto configuration feature. By using this, DHCP is not required and IP address is obtained with Network prefix and Interface ID. At a glance, this mechanism suggest that the configured IP would be globally unique. However, MIPv6 uses DAD mechanism to avoid any duplication in configured IP address. Based on the facts above, discuss:

a) Does Stateless IP address configuration guarantees the global uniqueness of the configured IP address?

b) Based on the finding of 'a', explain the importance of DAD in MIPv6 protocol.

Kindly answer the question with logical reasoning.