What is WAN Optimisation?

WAN optimisation is a combination of technologies and techniques used to intensify the efficiency of data transfer across the WAN. WAN optimisation is an integral part of network management; it enables companies to prioritise traffic and guarantee certain amounts of available bandwidth for the critical applications.

Examples of WAN Optimisation

Traffic prioritisation – define and allocate bandwidth to certain applications and services to ensure quality of service.


Eliminate redundant data – also known as data deduplication, this reduces data sent across a WAN by sending references instead of data.


Data compression – contract the size of data to limit bandwidth usage.


Data caching – repeatedly used data is hosted locally for faster access.


Streamlining data protocols – bundle multiple requests from “chatty” applications into one.


Managed bandwidth – place limits on how much bandwidth certain kinds of applications can utilise.

Why is WAN Optimisation Important?

With advances in cloud computing, applications and the Internet of Things, there is more and more traffic being driven over WAN. This has a major impact on the performance of business-critical apps that utilise your WAN. Therefore WAN optimisation is used to provide resilience, reliability and enterprise-grade performance across business networks. This ensures business-critical functions can operate as they need to. Businesses also need to ensure their networks can handle real-time applications that encompass voice and video, to help drive productivity of ever-more diversely spread workforces.

How WAN Optimisation Could Help Your Business

Enable Mobile Working from Remote Locations – eliminate the effect of distance between offices.

Improved Application Performance – bandwidth previously used for other purposes can now be dedicated to business-critical applications.


Rapid File Accessibility – caching will enable workers who access the same files repeatedly to access them more quickly because only new data must be saved and retrieved.


More Reliable and Faster Data Recovery – remote backup of data becomes easier, which is essential for DR. Network response times can be increased too, which enables users to rapidly regain access to critical applications if there were a crash.


Increased Efficiency – lessen the effects of latency and maximise bandwidth utilisation by relieving network congestion.


Cost Savings – application consolidation can drastically reduce the amount of equipment and software a company needs. Furthermore, through bandwidth management, caching, compression and protocol optimisation, bandwidth requirement is reduced.

An Example of WAN Optimisation

A Case Study that shows this in practice is Charterhouse’s Solution for Astrum Education. The objectives we had included building a centralised voice and data solution to accommodate all users on-site and to roll-out a robust scalable IT communication infrastructure.  We optimised the WAN underpinning the entire solution meaning it was on time, within budget and maximised user efficiency.


If you’re planning on reviewing your network performance, get in touch with Charterhouse.