I assume you're talking about portion of the OSI model that handles character-encoding such as ASCII. It is the Presentation Layer of the OSI model.
physical layer
transport layer
Physical layer which is the first layer in OSI reference model is responsible for signal encoding and decoding.
That would be layer 7 - the application layer.
The Physical Layer
CFC's are responsible. They deplete the ozone layer.
The ozone layer is responsible for absorbing harmful rays from the sun. These are UV rays.
physical layer
The network layer is the layer that is responsible for routing packets on the network. This is the layer in which Internet protocol operates. In the seven layer OSI model, the network layer is the third layer from the bottom.
The application layer (layer 7) is responsible for file transfer operations.
The ozone layer is responsible for screening out UV rays. These are fatal for life on earth.
transport layer
The layer responsible for blocking of UV rays are ozone layer. These are harmfulradiations which can cause various problems in living organisms.
Physical layer which is the first layer in OSI reference model is responsible for signal encoding and decoding.
There are in total seven layers in OSI model . OSI model layer that is responsible for the termination of connections between hosts is session layer . Session layer is responsible for the dialog control .
That would be layer 7 - the application layer.
Myocardial layer