title: Can't see another computer in WiFi
body: <p>I am trying to do a little experiment and I'm getting pretty odd results that I can't explain. I came to my University with my friend, we both brought our laptops and we connected to the same WiFi. But from some reason, our computers couldn't communicate with each other. For example, I couldn't ping him, and I when I did an ARP Scan to find all the hosts on the LAN I didn't find him. He did the same. He couldn't ping me and he didn't find my laptop when he did an ARP scan. Yet, there were many other devices on the LAN that both of us could ping and that we both found in our ARP scan. The University may be big, but we sat just next to each other.</p>
  
  <p>I know that the WiFi on the university may be complex, but yet I have no explanations of what is happening. We sit next to each other, connect to the same WiFi(same Access Point MAC), we both see many same devices in our LAN, yet we can't see each other. Anyone has any idea of what may be happening? Why can't we see/ping each other while we are on the same LAN? </p>
  
  <p>Thanks! :)</p>