Wide Area Network (WAN) optimization is used for network acceleration and bandwidth management in monitoring of networks to prevent network congestion and to ensure business continuity. Some methodologies used to obtain this optimization include:
- Limiting WAN access to selected applications and websites,
- Applying specific policies and traffic shaping to applications of different classes of service (CoS),
- Acceleration of business-critical applications.
By optimizing the bandwidth usage, WAN optimization can help reduce the need for expensive multiprotocol label switching (MPLS) line leases in order to ensure office connectivity and to achieve the same service quality by bundling multiple lines of cheaper access technologies.
Enterprise equipment vendors can use deep packet inspection (DPI) and advanced metadata extraction as provided by R&S®PACE 2 to create leading-edge products that support:
- Classification of more than 2800 applications and application attributes for fine-grained bandwidth management e.g. to prioritize Skype calls over web surfing & Skype messaging
- Extraction of various QoE KPIs like throughput, jitter, bitrate, latency & packet loss to allow automatic adaption to changing network conditions and detailed audio & video metadata
- Optimization of video delivery by caching downloaded content for successive requests
- Increased network transparency for the network administrator up to OSI Layer 7 and above – as HTTP is becoming the new TCP, visibility up to OSI Layer 4 is not sufficient anymore for distinguishing between the various kinds of HTTP-based applications and services