The Aalto Netlab's Linssi project aims to detect dissimilarities in the global DNS query system. This is important as the current Internet is built from different sort of building blocks than the Internet used to rely on. The old model, where possibly a single server or a server farm located in a single location served all requests of a website, is giving way to a new model where more and more of the data is distributed around the Internet and served to the client from locations more near to the client. This improves the user experience as websites download faster and more and more of the content providers use content distribution networks (CDNs) to serve their data and improve their quality of service. The users of the current day Internet are getting used to the faster page refresh times offered by content distribution networks and the websites failing to deliver the fast delivery the client expects are often not visited as often as the ones that do.
The CDNs change the way traffic is handled to the client. This change has to be taken into account in the various measurements performed on the Internet. Our project aims to look at what the Internet looks from the perspective of users around the world so we can make measurements that account for the actual user experience at the end host and not only model the Internet as a large network that offers the same service in any node of the network.