Hop-by-hop transport

When we send something from one computer to another over the internet, the message goes through lots of different parts, like tunnels and bridges. Each part has to do a little bit of work to make sure the message gets where it's supposed to go. Hop-by-hop transport means that each part of the message goes through one part of the journey at a time. So, it's like if you were sending a toy car through a really big maze and you had to ask each person or toy in the maze to help get the car to the end. Each person would only be responsible for moving the car to the next part of the maze, until it reaches the end. Hop-by-hop transport works the same way, making sure that every part of the message is taken care of along its journey through the maze of the internet.