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Hardware
Modem Transforms digital information into analogue signals which can be transmitted through wires Translates incoming analogue signals into digital information Modulates and demodu...
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networking
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Layers
Layers are an abstract form of model representing the transportation of requests. An example of this is the OSI model and TCP/IP. Each layer is completely independent and has one s...
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Network Security
Need for Security To only permit authorised users to access what they need To prevent unauthorised access To minimise potential damage from unauthorised access Firewall Controls ac...
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Network Security In Development
Code Quality Improving general code quality helps prevent vulnerabilities. Guarding against attacks Buffer overflow SQL injection Input validation Additional security functionality...
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Network Threats
Mal icious Soft ware Malware Unwanted Dangerous Worm Standalone program, does not need to be run Exploit vulnerabilities in the destination to spread automatically Virus Embeds its...
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Networking
A network is two or more computers connected together. The largest network is the internet. Advantages Users can share files Users can share peripherals and connections to other ne...
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Packet and Circuit Switching
Circuit Switching Basis for traditional telephone networks Creates a temporary and dedicated link of fixed bandwidth between the source and destination Guarantees the quality of tr...
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Processing
Client Side Processing Pre processing prior to server communication Interactivity Java Script Run in browser Enables users to have a better web experience Better website functional...
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Protocols
Protocols are a set of standardised rules that computers must follow in order to communicate with each other and be compatible with each other.
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TCP/IP Model
The TCP/IP model also known as the ATIL model is composed of four different layers: Application Transport Internet Link It directly correlates to the OSI model. out of specificatio...
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Topology
Client Server Model A network topology in which the: client accesses requests data from the server client initiates communication to the server server waits for requests from the c...
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Types of Networks
LAN Local Area Network PAN Person Area Network WLAN Wireless Local Area Network CAN Campus Area Network MAN Metropolitan Area Network WAN Wide Area Network SAN Storage Area Network...
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