What are interlayer communication channels?

Interlayer communication channels are like secret pathways that let different parts of a system talk to each other.

Imagine you have two floors in a house, one for playing and one for sleeping. If you want to tell your brother on the second floor that it’s time to wake up, you might shout through a stairwell or use a phone. These are like communication channels, they help messages travel between different parts of the house.

Think of each part of the system as a person who needs to send a message. They put their message in an envelope, and then it goes through a special door (the communication channel) to reach the other person. This works whether they're on the same floor, or across town, just like how messages can go from one part of your brain to another.

Now picture a toy train that moves between two tracks. Each track is a layer in the system. The train uses a bridge (the communication channel) to switch from one track to the other, just like how messages move between layers using these secret pathways.