information flow diagram



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network typologies

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Network Topology - arrangement of internet where device supposed to be two type of network topology: 1. Logical - how device appear to be connected to each other example; packet tracer. 2. Physical- actual interconnection with wire and cables(actual connected). point-to-point:  two device directly connected together figure 1(point to point topologies) example; can be PC and PC, PC to switch + sending information is faster + no traffic - cannot connect more device - the cable broke will affect the others. BUS use (1 backbone) 1 cable connected to several devices (it can be PC, Printer, laptop)   figure 2(BUS topology) +not expensive because only use one cable +easy to install another device -if one PC is broke it will affect others, because of using 1 cable. -there will be traffic if many hosts want to send information at the same time. STAR it uses a switch, hub or a router in the middle to connect to any device   ...
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Security Vulnerability test - vulnerability scanning

 Network Scanning  Describe the test and purpose of the test?  Network scanning refers to the use of a computer network to gather information regarding computing systems. Network scanning is mainly used for security assessment, system maintenance, and also for performing attacks by hackers. the purpose of network scanning is:  Recognize filtering systems between the user and the targeted host Reduces the fallout from security breaches, including legal action that can steal your private information.  to prevent malicious attack   Discuss how it works? Methods of Port Scanning Refers to the process of sending packets to specific ports on a host and analyzing the responses to learn details about its running services or locate potential vulnerabilities. Once available hosts on a network have been found via networking scanning, port scanning can be used to discover the services in use on specific ports...
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