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- Cluster nodes are usually connected using more then one network interface
- (e.g. a standard Ethernet and a cross-cable Ethernet or serial link)
- - this helps reduce the chance for a "split brain" problem (we'll explain
this later on).
- Sometimes, each cluster node is connected to a different network switch.
- - this is done in order to avoid a single switch failure causing the entire
cluster to be in-accessible.