Apple Mac mini (Mid 2011) - Manual (Page 60)

60 Chapter 4 Problem, Meet Solution
Network Connections
Make sure the Ethernet cable is plugged into your Mac mini and into the network.
Check the cables and power supplies to your Ethernet hubs and routers.
If you have two or more computers sharing an Internet connection, make sure your
network is set up properly. You need to know whether your ISP provides only one IP
address, or a different IP address for each computer.
If your ISP provides only one IP address, then you must have a router capable of
sharing the connection, also known as network address translation (NAT) or “IP
masquerading.” For setup information, see the documentation provided with your
router or ask the person who set up your network. You can use an AirPort base station
to share one IP address among multiple computers. For information about using an
AirPort base station, see Help Center or visit the AirPort Support website at
www.apple.com/support/airport.
If you can’t resolve the issue using these steps, contact your ISP or network administrator.
Problems with Wireless Communication
If you have trouble using wireless communication:
 Make sure the computer or network you’re trying to connect to is running and has a
wireless access point.
 Make sure you’ve properly configured the software according to the instructions that
came with your base station or access point.