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3.1 DESCRIBE THE REFERENCE MODEL (3.1.3 DIFFERENTIATE BETWEEN OSI AND…
3.1 DESCRIBE THE REFERENCE MODEL
3.1.1 DEFINE OSI MODEL
The Open Systems Interconnection model (OSI model) is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system without regard to its underlying internal structure and technology.
3.1.2 DEFINE TCP/IP MODEL
3.1.3 DIFFERENTIATE BETWEEN OSI AND TCP/IP MODEL
OSI MODEL
it has 7 layers
has a separate presentation and session layers
it has a general model. can be used by other applications
protocol are hidden and can be easily replaced as a technology changes
TCP/IP MODEL
it has 4 layers
does not have separate presentation or session layers
it is a specific model for internet. cannot b e used in other applications
replacing protocols is not easy
DESCRIBE THE ENCAPSULATION/ DE-CAPSULATION PROCESS IN NETWORK COMMUNICATION
Encapsulation