2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/176136We calculate the exact values of the quasinormal frequencies for an electromagnetic field and a gravitational perturbation moving in $D$-dimensional de Sitter spacetime ($D \geq 4$). We also study the quasinormal modes of a real massive scalar field and we compare our results with those of other references.26 pages, 1 table. Some changes made according to referee's suggestions. Matches published version in GRGGeneral Relativity and Quantum Cosmologytext