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Session Objectives #13. Protocols. The word protocol means ‘a set of rules’. Therefore Network Protocol – a set of rules or standards that control the transmission of data between devices.
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Protocols The word protocol means ‘a set of rules’. Therefore Network Protocol – a set of rules or standards that control the transmission of data between devices. These rules will include that method of transmission (serial or parallel, the bit rate, transmission modes (simplex, duplex, half) and error checking. If using parity both computers would need to be using even parity or odd. If there are any differences to any of these rules then messages would be never be accepted.
Protocol Layers Protocols are organised into “layers” which link into each other. This means it is possible to “tweak” individual layers without affecting the whole network standard. Protocols can be divide into 2 parts: logically based and physically based. What might these 2 parts consist of? As you will see the logical rules that can be applied depend on the physical rules (or infrastructure) that is already in place.
Examples of Protocols There are many protocols that have been developed over the years. TASK: Create a table and research the meaning and application Of the following protocols.
Practical Investigation TASK: Follow the ‘making a network connectiom’ tutorials and attempt to create a direct network connection to the internet using a laptop (with wifi) and a raspberry pi. Answer the following questions: 1.What is the IP address of your raspberry pi 2.Explain what an IP address is? 3.Discuss why you cannot connect a raspberry directly to a network?