Which of the following statements is true about packet routing on the Internet?

The correct statement is that a packet may be rerouted multiple times during its journey. This reflects the dynamic nature of packet routing on the Internet, which utilizes algorithms and protocols to determine the best path for data transmission. As packets travel from the source to the destination, they may encounter various obstacles, such as network congestion or device failures. Routers actively monitor the network and may reroute packets through alternative paths to deliver them more efficiently, ensuring that data can adapt in real-time to changing network conditions.

In contrast, the other statements do not accurately capture the fundamental processes of packet routing. For example, the idea that packets are sent over a predetermined path is misleading, as the routing can vary based on current network status rather than following a fixed route. The communication between routers only during congestion oversimplifies their ongoing interaction, as routers continuously exchange information to optimize routing. Lastly, the assertion that packets are never lost during transmission does not hold up, as packets can indeed be lost due to network errors, timeouts, or overwhelming traffic, something that protocols are designed to manage.