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Make network security testing a routine and integral part of the system and network operations and administration. Organizations should conduct routine tests of systems and verify that systems have been configured correctly with the appropriate security mechanisms and policy. Routine testing prevents many types of incidents from occurring in the first place. The additional costs for performing this testing will be offset by the reduced costs in incident response. Test the most important systems first. In general, systems that should be tested first include those systems that are publicly accessible, that is,. | Network Security Network Security Hierarchy Material elaborat dupa CISCO Security Curriculum Kenny Paterson s Lectures for M.Sc. in Information Security Royal Holloway University of London 11 2 2009 Vasile DADARLAT Retele de calculatoare An I Master 1 Objectives of Lecture Understand why security should be a fundamental consideration when designing and operating networks. Examine the primary enabling threats and fundamental threats to security for networks. Introduce security services and mechanisms and show how they can be used to counter threats. Study the provision of security services at different network layers in standard ISO7498-2. 11 2 2009 Vasile DADARLAT Retele de calculatoare An I Master 2 Why Network Security Organisations and individuals are increasingly reliant on networks of all kinds for day-to-day operations - e-mail used in preference to letter fax telephone for many routine communications. - B2B and C2B e-commerce still growing rapidly. - the Internet is a vast repository of information of all kinds competitors and their prices stock markets cheap flights . - increased reliance on networks for supply chains of all kinds from supermarkets to aircraft components. - utility companies control plant banks move money governments talk to citizens over networks. - growth of mobile telephony for voice and data. 11 2 2009 Vasile DADARLAT Retele de 3 calculatoare An I .
