Node snaps to a point object drawn with the POINT command.
Points included in a block definition can function as convenient snap points for attachment locations. The Node object snap is frequently used with DIVIDE and MEASURE, which insert points at intervals on the objects you select.
Intersection snaps to the intersection of objects such as lines, circles, arcs, and splines. If the target area covers only one object, AutoCAD LT prompts you to select a second object and then snaps to the imaginary intersection formed by extensions of those objects.