NETWORKING 2011 Workshops International IFIP TC 6 Workshops, PE-CRN, NC-Pro, WCNS, and SUNSET 2011, Held at NETWORKING 2011, Valencia, Spain, May 13, 2011, Revised Selected Papers - Casares-Giner, Vicente; Manzoni, Pietro; Pont, Ana (Springer Berlin Heidelberg, 2011)