OSI model
2023
04
09:47
OSI- Open System Interconnection
Layers:
7.Application- provides network services to the end user, protocols
that work with the data the client is using.
6.Presentation- preforms syntax processing, converting data from
one format tot the other(data from the top layer, in application
Format to network format and vice versa
5.Session- the construction, direction and conclusion of
connections between devices occurs.
4.Transport- Responsible for the transmission of data across
network connections.
TCP- Transmission Control Protocol .
UDP- User Datagram Protocol.
3.Network- handles the routing of the data.
Each frame of data is examined to make sure if it got to its end
destination.
Mapping between logical and physical addresses.
ARP- Address Resolution Protocol.
2.Data Link- sets up link across the physical network, checks for
transmission errors and packages the bits into data frame.
Manages the physical addressing methods for the MAC/LLC layer.
Media Access Control (MAC)
Logical Link Control (LLC)
1.Physical- is the electrical or physical layers of the model.
Includes the network cables, power plugs, cable pinouts, wireless
radio frequencies, connectors, transceivers, receivers, repeaters,
pulses of light, electric voltages, etc.
Data Encapsulation and De-Encapsulation (PDU)
networking Page 1