2Note on terminology: the term “Internet services” is potentially ambiguous. The term “Internet Service Provider” (ISP) is commonly used to mean a company that provides basic Internet access, i.e. connectivity at Layer 3 in the OSI model. The term “Application Service Provider” (ASP) is used to mean a company that delivers end-user services such as e-mail, i.e. functionality at Layer 7 in the OSI model. Throughout this document when we say “Internet services” or “Subscriber Services” we mean services at application level.