  The paradigm of \Lambda CDM cosmology works impressively well and with the
concept of inflation it explains the universe after the time of decoupling.
However there are still a few concerns; after much effort there is no detection
of dark matter and there are significant problems in the theoretical
description of dark energy. We will consider a variant of the cosmological
spherical shell model, within FRW formalism and will compare it with the
standard \Lambda CDM model. We will show that our new topological model
satisfies cosmological principles and is consistent with all observable data,
but that it may require new interpretation for some data. Considered will be
constraints imposed on the model, as for instance the range for the size and
allowed thickness of the shell, by the supernovae luminosity distance and CMB
data. In this model propagation of the light is confined along the shell, which
has as a consequence that observed CMB originated from one point or a limited
space region. It allows to interpret the uniformity of the CMB without
inflation scenario. In addition this removes any constraints on the uniformity
of the universe at the early stage and opens a possibility that the universe
was not uniform and that creation of galaxies and large structures is due to
the inhomogeneities that originated in the Big Bang.
