The OSI Model Quiz

1. True or False: The network layer uses physical addresses to route data to destination hosts.

True

False

The network layer uses logical addresses to route data to destination hosts.

Explanation

The network layer uses logical addresses to route data to destination hosts.

2. The upper layers of the OSI model are, in correct order -

Session, application, presentation

Session, presentation, application

Session, application, presentation, physical

Application, presentation, session, physical

By convention, the "upper layers" of OSI consist of session (layer five), presentation (layer six), and application (layer seven). All other layers of OSI belong in the "lower layers" category, although some references will claim that the transport layer (layer four) also belongs in the upper layers.

Overall, the distinction between upper and lower layers in OSI is not nearly as important as the ordering and purpose of each layer individually.

Explanation

By convention, the "upper layers" of OSI consist of session (layer five), presentation (layer six), and application (layer seven). All other layers of OSI belong in the "lower layers" category, although some references will claim that the transport layer (layer four) also belongs in the upper layers.

Overall, the distinction between upper and lower layers in OSI is not nearly as important as the ordering and purpose of each layer individually.

3.
Which of the following are benefits of using a layered network model?
A . it specifies how changes to one layer must be propagated through the other layers
B . it facilitates troubleshooting
C . it focuses on details rather than general functions of networking
D . it breaks the complex process of networking into more manageable chunks
E . it allows layers developed by different vendors to interoperate.

A and B only

B,D and E

A and C only

None of the above

All of the above

A layered network model facilitates troubleshooting by dividing the network into separate layers, allowing for easier identification and isolation of issues. It breaks down the complex process of networking into more manageable chunks, making it easier to understand and implement. Additionally, it allows for interoperability between layers developed by different vendors, promoting flexibility and compatibility in network systems.

Explanation

A layered network model facilitates troubleshooting by dividing the network into separate layers, allowing for easier identification and isolation of issues. It breaks down the complex process of networking into more manageable chunks, making it easier to understand and implement. Additionally, it allows for interoperability between layers developed by different vendors, promoting flexibility and compatibility in network systems.

4. Think of the physical layer as the "electrical" layer of the model - the physical layer is the layer of low-level networking equipment, such as some ____________,____________and _________ . The physical layer is _________concerned with protocols or other such higher-layer nonsense.

Think of the physical layer as the "electrical" layer of the model - the physical layer is the layer of low-level networking equipment, such as some hubs, cabling, and repeaters. The physical layer is never concerned with protocols or other such higher-layer nonsense.

Explanation

Think of the physical layer as the "electrical" layer of the model - the physical layer is the layer of low-level networking equipment, such as some hubs, cabling, and repeaters. The physical layer is never concerned with protocols or other such higher-layer nonsense.

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