Intercepting LAN network traffic via WiFi

Posted by user1613655 on Super User See other posts from Super User or by user1613655
Published on 2012-09-26T20:50:36Z Indexed on 2012/09/26 21:40 UTC
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Let's get straight to the point. This is my fictive network architecture:

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My question is: Would it be possible for Laptop B to intercept traffic sent and received by Laptop A? Please note that B only has WiFi access and no physical control over Router B. Furthermore, Router A and B create different wireless networks with different encryption keys.

If both shared the same wireless network or Laptop B had LAN-access to Router B, the answer would be trivial, but I'm not sure how the answer turns out in this scenario :-/

Thanks for your valuable help!

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