answer 
a phrase containing figurative language in which the word expresses a different idea from its exact meaning
 explanation \ reasoning 
idiom example: "break a leg"
this is an idiom because it is figurative language that doesn't exactly mean what it says. the person saying "break a leg" just means do really good that you'll "break a leg". in reality, we don't actually want you to break a leg. we just mean it figuratively.
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cloud computing architecture refers to the components and subcomponents required for cloud computing. these components typically consist of a front end platform (fat client, thin client, mobile device), back end platforms (servers, storage), a cloud based delivery, and a network (internet, intranet, intercloud).
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both network computers, but only a wan can cover larger geographical ranges.
a lan is a local area network.
a wan is a wide area network.