Consider the delivery of messages in an internetworked environment in which the source and destination nodes are many hops apart. Large messages must be fragmented and reassembled using one of two possible approaches.

The first approach involves fragmenting each message at the source node, and then reassembling them at the destination node.

The second approach involves fragmenting each message at the source node, reassembling and re-fragmenting them at intermediate nodes, and final reassembly at the destination node.

With reference to two distinct examples, describe circumstances where each of the methods would be preferred over the other.