Sentel plc is a UK financial services company with offices in the south east and north west of England. In total the company has five offices in the south east of England and six in the north west. It currently employs 97 staff. The company has been trading successfully for 17 years. For the year ending 31 December 2005 the company’s fee income was £18.4m and its net profit for the year was £10.1m. During 2006, however, Sentel’s computer system/network was targeted by a number of UK based groups attempting to gain unauthorized access to the company’s system/network and steal confidential client information. During May 2006 the company computer system/network was severely infected by a polymorphic virus and on 6 May 2006 the computer system/network suffered a complete systems failure resulting in company losses of approximately £655,000.
Required
Explain the main prevention strategies and technology tools a company like Sentel plc could adopt/use to prevent or at least manage unauthorised access and virus infection.