OSI Model

Question 1

Layer1: Physical layer

Answer 1

carries data across physical hardware.
User: ethernet cables.
Examples:
    -are all the cables plugged in?
    -Is the network card functioning?
    -Could it be a faulty cable?

Question 2

Layer 2: Data Link layer

Answer 2

At this layer, the physical addresses are added to the data. This is the source and destination mac addresses.
Switches operate at this layer
Example:
-Maybe the switch has gone bad?

Question 3

Layer 3: Network layer

Answer 3

The network layer handles ip addressing and routing. At this layer, the source
and destination IP addresses are added.
Routers operate at this layer
Example:
    -Is the router functioning?
    -Do i have the right IP address?

Question 4

Layer 4: Transport layer

Answer 4

This layer adds transport protocols such as TCP/UDP, and ads source/destination
port numbers.
Example:
-Could the internet card be functional?

Question 5

Layer 5: Session layer

Answer 5

this layer is responsible for establishing and terminating connections between devices.
Example:
-Are you connecting to the correct address?

Question 6

Layer 6: Presentation layer

Answer 6

This layer formats the data in a way the reciving application can understand it. This
layer can also encrpyt and decrypt data if needed
Example:
-Are you reading the data in the same order that you wrote it?

Question 7

Layer 7: Application layer

Answer 7

This layer is where the application and user communicates
Applications used here such as SMPT, if youre sending an email for example.
Example:
-Is the application erroring out?