All it means are these device have troubles. Since every other device is OK why would you suspect your network?
I'm not sure if I worded that question correctly so let me try to explain further.
I am the webmaster of my fraternity. We have our own wireless network, with routers in each room. We also have ethernet plugs in each room. A couple guys have pointed out that they aren't able to use the wired internet, either for their computers for Xbox Live.
I was wondering if anyone could explain why this is happening and if there's anything I can do to fix it.