  A black hole considered as a part of a thermodynamical system possesses the
Bekenstein-Hawking entropy $S_H =A_H /(4l_{\mbox{\scriptsize{P}}}^2)$, where
$A_H$ is the area of a black hole surface and $l_{\,\mbox{\scriptsize{P}}}$ is
the Planck length. Recent attempts to connect this entropy with dynamical
degrees of freedom of a black hole generically did not provide the universal
mechanism which allows one to obtain this exact value. We discuss the relation
between the 'dynamical' contribution to the entropy and $S_H$, and show that
the universality of $S_H$ is restored if one takes into account that the
parameters of the internal dynamical degrees of freedom as well as their number
depends on the black hole temperature.
