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Computer Science
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Figure 3.7: Encapsulation and decapsulation in OSI model
Exercise 3.2 so, propose potential adaptations
or alternative models that might
1. What happens when application be necessary.
data moves from one layer to
another in the OSI model as far as 4. Differentiate between physical
OSI models is concerned. communications and virtual
communications between OSI
2. Evaluate what is added to the user layers during data transfer.
data when it passes from one layer
to another in the OSI model. Give
the resulting name for user data at Physical layer
each layer. The Physical layer of the OSI model
3. The OSI model has been around for is the lowest layer in the hierarchy and
decades. Despite its enduring value, is responsible for the transmission and
can you envision any limitations reception of raw data bits. It serves as the
of the model in the context of interface between the network’s logical
future network technologies? If data and the actual physical medium
134
for Advanced Secondary Schools
Computer Science Form 5.indd 134 23/07/2024 12:33
