nd service providers by giving priority to one OTT service over the others. Network neutrality does not allow degradations of individual OTT applications and services by their blocking and throttling. However, reasonable traffic management should be applied on the Internet traffic. In the ideal case, traffic management may contribute to better QoS of OTT services and applications (e.g. by giving priority to real-time services and applications over non-real-time but avoiding bandwidth starvation for any OTT service). One possible approach for better QoS support on a network neutrality basis on the Internet is to provide means to end-users (e.g. via fixed access networks) to specify preferences for certain OTT services (e.g. priority of gaming traffic over Web traffic); however, that should refer only to the customer's own network (either home or business) and can be supported by fixed service providers (e.g. via settings on the home gateway/router). 8.3 Main Regulatory Goals on Network Neutrality Bearing in mind the possible causes of IAS degradation as well as degradation of indi- vidual OTT services and applications, the question is, when is regulatory intervention needed in respect of network neutrality? The market situation should be evaluated to determine whether the problem requires a certain type of regulatory intervention, which is dependent upon the availability of such offers and the ease of customers switching ISP (that provides the IAS), which includes all burdens faced by customers (e.g. price difference between the offers for IAS of the old ISP and the new ISP). In general, there is no need for intervention when there is good availability of IAS offers on the market with satisfactory quality at a reasonable price, and at the same time there exists sufficient possibility and ease to switch providers (i.e. ISPs), as shown in Figure 8.3. When switching ISPs is hard and availability of IAS offers on the market (e.g. in the given country) is low, there is a need for regulatory intervention by the NRA. Suc