4.6 Explain different methods and rationales for network performance optimization.


 * Methods:
 * QoS
 * Traffic shaping
 * Load balancing
 * High availability
 * Caching engines
 * Fault tolerance
 * CARP
 * Reasons :
 * Latency sensitivity
 * High bandwidth applications (VoIP, video applications, unified communications)
 * Uptime