Episode 2 of 9 · WhatsApp
Why your phone holds a connection open forever
Included with a plan
This video is included with a plan. The first three lessons of every track are free, with their boards and videos. A plan unlocks every lesson, board, video, lab and paper for one price.
Chapters
Why your phone holds a connection open forever. A server cannot start a conversation with your phone. There is no number to call. It sits behind a carrier's network with no public address, and whatever address it does have will
Based on the board The Persistent Connection.
Covered in WhatsApp - the case study.
Saved in this browser only.