How were the Battle of Dieppe and D-Day connected?

Dieppe was considered to be an invasion rehersal for the Allies, It applied none of the lessons learned in the Pacific Theatre. It was botched. They did learn some things from it that aided at Normandy. They improved their communications equipment and skills, they integrated staffing, they worked out some of the kinks in air and Naval Gunfire support and they learned not to land tanks in places where they couldn't advance off the beach head. For the Canadians it came at a terrible price. Of course at Normandy their communications and coordination were still terrible. The British Funny Tanks performed well and the Canadians were the only unit to reach their D-Day objectives. Dieppe had helped.