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Authors:
James F. Kurose, Keith W. Ross
Chapter:
Application Layer
Exercise:
Review
Question:18 | ISBN:9780132856201 | Edition: 6

Question

From a user’s perspective, what is the difference between the download-and- delete mode and the download-and-keep mode in POP3?

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Answer

  • In the download-and- delete mode, client receives messages from a POP, then delete the messages.

  • In the download-and-keep mode, client receives messages from a POP and store messages, never deleted messages.


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Discussions

Shreejay Mall

With download and delete, after a user retrieves its messages from a POP server, the messages are deleted. This poses a problem for the nomadic user, who may want to access the messages from many different machines (office PC, home PC, etc.). In the download and keep configuration, messages are not deleted after the user retrieves the messages. This can also be inconvenient, as each time the user retrieves the stored messages from a new machine, all of non-deleted messages will be transferred to the new machine (including very old messages).

Post the discussion to improve the above solution.