Where does it make sense—cost-wise and performance-wise—to invest in WAN Optimization equipment? This is a question some clients will have. There are a few of them on the market, and they all claim to speed up application performance and save money on bandwidth. How do we in good conscience advise a client on whether they should invest the money in WAN Optimization equipment, and at which of their sites? Ideally you would do some testing with demo equipment, or on a try-and-buy basis, to obtain real-life data for your recommendations. Before then you can look at the specs on the brand of Optimizer you are considering and you can get a good prediction on how it should perform.