iphone :- what is difference between activity indicator and network activity indicator?

i want to know what is difference between activity 开发者_运维技巧indicator and network activity indicator ?

is this same thing ?

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An activity indicator is a UIView that is a spinning icon to indicate loading/etc. Since it is a view you can place it anywhere within your application. The network activity indicator handles the animation on the device toolbar to indicate network activity.

Network Activity Indicator:

UIActivityIndicatorView