  The dynamics of silica displays an Arrhenius temperature dependence,
classifying silica as a strong glass-former. Using recently developed concepts
to analyse the potential energy landscape one can get a fundamental
understanding of the long-range transport of silica. It can be expressed in
terms of properties of the thermodynamics as well as local relaxation
processes, thereby extending the phenomenological standard picture of a strong
glass-former. The local relaxation processes are characterized by complex
correlated sequences of bond breaking and reformation processes.
