Existing comment:
How does TCP work?
Imagine sending a book via postcards:
* Cut up pages to fit on postcards (internet packets)
* Number every postcard in case they get out of order
* Keep copies in case they get lost
* Receiver sends a postcard to tell you want [what] has been received so far
* That postcard may get lost...
* Timeout and start sending duplicates until you DO get a confirmation
* Don't send too many at a time (overloads mailbox) |