You will need Raspberry Pi with power and a standard network cable.
Raspberry Pi Model B LAN chip includes Auto-MDIX (Automatic Medium-Dependent Interface Crossover). Removing the need to use a special crossover cable (a special network cable wired so that the transmit lines connect to receive lines for direct network links), the chip will decide and change the setup as required automatically.
It may also be helpful to have a keyboard and monitor available to perform additional testing, particularly if this is the first time you have tried this.
To ensure that you can restore your network settings to their original values, you should check whether it has a fixed IP address or the network is configured automatically.
To check ...
