Conversation

FTP is a friendly transfer protocol that just happens to also transfer files.

When an FTP client connects to an FTP server, they exchange pleasantries, then sit down with each other have rousing discussions about their lives.

Once they're caught up, the client takes the stack of books it was handed by the user and proceeds to have an hour-long discussion about their contents.

The user is later upset because they've discovered those books were actually ZIP archives that were transferred in ASCII mode.