As networks rapidly develop and applications become more diversified, various value-added services such as Internet Protocol television (IPTV) and video conferencing have become increasingly more widespread. However, network disconnections may affect many services and cause losses. As a result, demands for network infrastructure reliability are rising.
In real-world applications, many network failures and service interruptions are caused by non-technical factors. An effective way to enhance system reliability is to improve fault tolerance capabilities of the system, speed up fault recovery, and reduce the impact of faults on services.