  Fluctuation magnetoconductivity and magnetization above the superconducting
transition temperature (Tc) are measured on the recently discovered 112 family
of iron-based superconductors (IBS), Ca$_{1-x}$La$_x$Fe$_{1-y}$Ni$_y$As$_2$,
which presents an extra As-As chain spacer-layer. The analysis in terms of a
generalization of the Lawrence-Doniach (LD) approach to finite applied magnetic
fields indicates that these compounds are among the most anisotropic IBS
($\gamma$ up to ~30), and provides a compelling evidence of a
quasi-two-dimensional behavior for doping levels near the optimal one.
