According to Peter Sevcik, president of NetForecast and founder of a new industry organization working to create a standard for measuring application performance, the LAN and WAN are closely linked when it comes to application performance.
"The LAN is considered the creation part of the application, in which the user request is responded to by several components that need to be properly configured," he explains. "Following the creation, if the application request travels outside the LAN, the WAN picks up and acts as the delivery agent. While they two aren't directly linked in vendor products, an application that performs poorly on the LAN won't be as easy to deliver over the WAN. All the pieces have to be tuned for optimized performance."
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