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CHAPTER 7: Network security Fundamentals - Coggle Diagram
CHAPTER 7: Network security Fundamentals
standard network devices
Network devices can be classified based on function in Open systems interconnection (OSI) model
OSI model breaks networking steps into seven layers
Each layer has different networking tasks
Each layer cooperates with adjacent layers
Security functions of standard network devices can be used to provide degree of network security
Network Security Posture
Not all applications are designed and written with security and reliability in mind, so falls to network to provide protection
Network-delivered services can scale better for larger environments and can complement server and application functionality
Attacker who can successfully penetrate computer network may have access to thousands of desktop systems, servers, and storage devices
Network Security Strategy
Secure network defense still remains critical element in any organization’s security plan
Organizations should make network defenses one of first priorities in protecting information
Network security strategy:
Network devices
Network technologies
Design of the network
how Network Security Fundamentals works
Once information security and network security were virtually synonymous
The network was viewed as the protecting wall around which client computers could be kept safe
But this approach is untenable: too many entry points that circumvent the network and allow malware to enter:
Malware take advantage of common network protocols (HTTP), and could not always be detected or blocked by network security devices
infected USB flash drive
Standard Network Devices