2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/180622We overview the main configurations of D-brane probes in the AdS_5 x X^5 background of type IIB string theory (X^5 being a Sasaki-Einstein manifold), and examine their most salient features from the point of view of the dual quiver superconformal field theory.5 pages; contribution to the proceedings of the 2nd RTN Network Workshop and Midterm Meeting: Constituents, Fundamental Forces and Symmetries of the Universe, Naples, Italy, 9-13 Oct 2006; v2: a footnote and a reference addedHigh Energy Physics - Theorytext