  In this article, we compute the mod 2 representarion of the symmetric group
of order 2 over the singular cohomology groups of orderd 2-configuration space
$C_{2}(T^{d})$ of the $d$-torus $T^{d}$ for $d\geq 1$. As applications of the
computation, we determine the Stiefel-Whitney height of $C_{2}(T^{d})$ for any
$d$, and determine $\mathbb{F}_{2}[{\Sigma}_{2}]$-module structure of the
cohomology groups of the unordered 2-configuration space of the $d$-torus for
$d=2,3$ using the Serre spectral sequence.
