1. A method for network analysis in an access network in connection with a data transmission network including a plurality of subscriber lines, the method comprising: collecting data corresponding to physical layer operational parameters of at least one physical layer corresponding to at least one subscriber line; simulating a behavior of higher network layers, the simulation considering at least one application deployed on the at least one subscriber line, the simulation based on the collected data; generating simulation data corresponding to higher layer performance parameters for the at least one application based on the simulation; and generating an advice signal based on the simulation data, the advice signal indicating a compatibility of Quality-of-Service requirements for the at least one application with a combination of the at least one physical layer and the at least one application, the combination including the at least one application deployed on the at least one physical layer.