Wireless internet validating problem
Your department/building may or may not see all of these and you may also see additional ones that are specific to your department.
You can try messing around with the router settings if you like.
A wired network card requires an RJ-45 Ethernet cable, which looks very similar, but larger, than a phone cable and plugs directly into a data jack typically labeled D-## (telephone ports are usually labeled T-## or V-##).
This server will grant you access to the network via the Dynamic Host Configuration Protocol (DHCP).
So, create a backup first before going ahead with this step.
These are the possible fixes, try them one by one and you will get rid of the issue soon.
Ultimately I think the fix would be to get a new wireless router.