Do the WWE wrestlers actually fight for real in the ring?

The reason I ask is that when I have watched 'Total Divas', the fighting in the ring, like of looks like staged fighting. For example, boxers wear gloves and protect their heads.

Why don't the WWE wrestlers do that, and I notice that they are rarely harmed in the same way boxers are, during their fights. Is there something I'm missing?
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I live in the UK guys and am not familiar with WWE. I only recently started watching it via the total divas reality show and kind of wondered if it was real as it looked fake when I watched them 'fight'.
Do the WWE wrestlers actually fight for real in the ring?
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