depends on what version of server your running if its windows 2008 or newer check the reliablity moniter in server managment
Power supply
Add an additional network card to the server.
An Uninterpretable Power Supply will allow the server to shut down safely.
clustering
Clustering is the correct answer.
Load balancingLoad balancing
Network Load Balancing
The star bus topology has the most fault tolerance.
RAID 0 does not provide any fault tolerance.
RAID technology uses multiple disk drives to achieve either fault tolerance or an increase in read and write performance.
Load balancing is done between 2 or more servers where the load is distributed between servers. whereas, fault tolerance is done between 2 servers where one server acts as a primary and the second server acts as a back up server for the primary server. In case of failure of primary server, the second server(back up server) becomes the primary server.
Excessive load on existing servers Fault tolerance To isolate a new application