Which of the following is an oft-cited cause of vulnerability of networks?

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Which of the following is an oft-cited cause of vulnerability of networks?

A.
software monoculture

B.
software diversification

C.
single line of defense

D.
multiple DMZ

E.
None of the choices.

Explanation:
An oft-cited cause of vulnerability of networks is homogeneity or software monoculture. In particular,
Microsoft Windows has such a large share of the market that concentrating on it will enable a
cracker to subvert a large number of systems. Introducing inhomogeneity purely for the sake of
robustness would however bring high costs in terms of training and maintenance.

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