New Delhi, Dec. 25 -- Two and a half months have passed since Gaza 's latest ceasefire took effect, and the supplies being delivered to war-battered Palestinians are again the subject of fierce debate.

The underlying question is whether Israel is upholding a key commitment under the U.S.-backed ceasefire by allowing enough humanitarian aid into the territory. Israel says it is, but that claim is disputed by data from humanitarian organizations and Hamas-linked Gaza authorities.

The debate plays out in numbers of trucks said to be entering Gaza. But that tells only part of the story. Most trucks are operated by the private sector and carry commercial goods that are unaffordable to many Palestinians.

Here's what to know about the dispute...