State three techniques used by a network administrator to detect and prevent computer crimes.
(b) A company in town wishes to link its offices together. The linking may be through wireless or fibre optic network media.
(i) State two benefits that the company would gain from the use of metropolitan area network (MAN).
(ii) State three advantages of using wireless over fibre optic network media.
(iii) State two limitations of wireless communication.
(iv) State two transmission media used in wireless transmission.
(c) State three ways in which computer virus infection can be prevented other than through restricting the usage of removable storage media.
(a) Audit trail
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