Short answers, pulled from the story.
The 1954 Geneva Conference partitioned Vietnam at the 17th parallel, with Viet Minh forces regrouping to the north and State of Vietnam forces to the south. A non-binding Final Declaration called for nationwide reunification elections in July 1956, but those elections were never held.
The 1954 Geneva Conference ran from the 26th of April to the 21st of July 1954, at the Palace of Nations in Geneva, Switzerland. The three ceasefire agreements for Indochina were signed on the morning of the 21st of July, though they were dated the 20th of July to meet the French prime minister's self-imposed deadline.
On the Indochina issue, representatives from France, China, the Soviet Union, the United States, the United Kingdom, the Democratic Republic of Vietnam, the State of Vietnam, the Kingdom of Laos, and the Kingdom of Cambodia participated. Diplomats from South Korea, North Korea, China, the Soviet Union, and the United States handled the Korean side of the conference.
The United States and the State of Vietnam were the only two of the nine delegations that refused to accept the Final Declaration. The Eisenhower administration opposed provisions it could not support, including the partition of Vietnam, and instead issued a unilateral statement pledging to refrain from threatening force against the ceasefire agreements.
The International Control Commission was established to monitor the ceasefire in Vietnam. Chaired by India, with Canada and Poland as the other members, the ICC required unanimous agreement on all important decisions, meaning Poland's presence gave the communist bloc an effective veto over treaty supervision.
The ICC reported that at least 892,876 North Vietnamese were processed through official refugee stations heading south during Operation Passage to Freedom, including at least 500,000 Catholics and approximately 200,000 Buddhists. Moving in the opposite direction were roughly 14,000 to 45,000 civilians and approximately 100,000 Viet Minh fighters.