When you send a text... it travels from your mobile device to other physical infrastructure before it reaches the person you are texting.
This layer reveals the necessary infrastructure for a text message to be sent successfully.
When you send a text... there is a stepby-step technical procedure invisible to the human’s eyes. When the text appears on the other person phone, that is when such procedure is finished.
This layer highlights the essential technical components of the physical infrastructure, while giving a glimpse into the role each component plays in sending a text message
