The Concept of Layers (OCR GCSE Computer Science): Flashcards
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What are layers in network protocols?
What are layers in network protocols?
Groups of protocols that handle different parts of communication
What does 'self-contained layers' mean?
What does 'self-contained layers' mean?
Each layer performs its task independently of others
Between which layers does data pass?
Between which layers does data pass?
Adjacent layers only
How many layers in TCP/IP model?
How many layers in TCP/IP model?
Four
What does the Data Link Layer do?
What does the Data Link Layer do?
Controls physical hardware connecting hosts (NIC, cabling)
What does the Network Layer do?
What does the Network Layer do?
Makes connections, controls packet switching, directs data packets
What does the Transport Layer do?
What does the Transport Layer do?
Controls data flow and splits data into packets
What does the Application Layer do?
What does the Application Layer do?
Selects correct protocol depending on application
Modularity benefit of layers?
Modularity benefit of layers?
Each layer can be updated independently without affecting others
Interoperability benefit of layers?
Interoperability benefit of layers?
Standards ensure different manufacturers' devices can work together
Troubleshooting benefit of layers?
Troubleshooting benefit of layers?
Problems can be isolated to a specific layer
Which layer does TCP work in?
Which layer does TCP work in?
Transport Layer
Examples of Application Layer protocols
Examples of Application Layer protocols
HTTP, FTP, SMTP