Lecture 6 - Security in Networks - SECURITY IN NETWORKS...

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S ECURITY IN N ETWORKS Lecture 6 Week 6
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Topic cover Introduction to Network Who cause security problem Network security issues Network security controls
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O VERVIEW OF C OMPUTER N ETWORKS Definition A computing network is a computing environment with more than one independent processors May be multiple users per system Distance between computing systems is not considered (a communications media problem) Size of computing systems is not relevant 3
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N ETWORK RESOURCES Computers Operating system Programs Processes People 4
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N ETWORK A RCHITECTURE Network nodes Computers and user terminals which are connected to the network Layers and Protocols Network Architecture Physical Interconnection structure (topology) Logical communication structure 5
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