[en] We review and update the constraints on the parameters of the quark flavour mixing matrix V_CKM in the standard model and estimate the resulting CP asymmetries in B decays, taking into account recent experimental and theoretical developments. In performing our fits, we use inputs from the measurements of the following quantities: (i) vertical stroke εvertical stroke , the CP-violating parameter in K decays, (ii) ΔM_d, the mass difference due to the B⁰_d- anti B⁰_d mixing, (iii) the matrix elements vertical stroke V_cbvertical stroke and vertical stroke V_ubvertical stroke , (iv) B-hadron lifetimes, and (v) the top quark mass. The experimental input in points (ii) - (v) has improved compared to our previous fits. With the updated CKM matrix we present the currently-allowed range of the ratios vertical stroke V_td/V_tsvertical stroke and vertical stroke V_td/V_ubvertical stroke , as well as the standard model predictions for the B_s⁰- anti B_s⁰ mixing parameter x_s, (or, equivalently, ΔM_s) and the quantities sin 2α, sin 2β and sin² γ, which characterize the CP-asymmetries in B-decays. Various theoretical issues related to the so-called ''penguin-pollution'', which are of importance for the determination of the phases α and γ from the CP-asymmetries in B decays, are also discussed. (orig.)