Comment on I sent my boyfriend a picture of a storm. He got one of a woman and a dogparentComments−marginalia_nu4ySMS is like UDP, but less reliable. No delivery or ordering guarantee, messages may be stored and sent (re-sent) later.−tinus_hn4yHow is that less reliable? UDP has no delivery or ordering guarantee and no storage.−marginalia_nu4yStorage actually makes SMS worse (because it lacks delivery guarantees). Not only may a message be dropped, it may arrive a year later, or be duplicated and arrive much later.−rasz4yThere is delivery confirmation.
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SMS is like UDP, but less reliable. No delivery or ordering guarantee, messages may be stored and sent (re-sent) later.
How is that less reliable? UDP has no delivery or ordering guarantee and no storage.
Storage actually makes SMS worse (because it lacks delivery guarantees). Not only may a message be dropped, it may arrive a year later, or be duplicated and arrive much later.
There is delivery confirmation.