Session Layer

Computer Networks:

Physical Layers

Data link Layer(DLL)

Network Layer

Transport Layer:

Session and Presentation Layer:

Application Layer:

Session layer (5th Layer):
The 5th Layer of OSI reference model is the session layer, As we proceed up to the OSI layer stack from the bottom. The session layer is to control and maintain connection between system to share data it establishment and session across all channel.

Function of session layer:

Session establishment the session layer establish connection between device is which is known as session. the session which is created allow users to share data remote access and file management. The way in which transport connection maps are one to one one to many, Many to one and many two one.

Data transfer:
data transfer is the very basic function of session layer, which handles the exchange of that are between systems in a duplex form or a half duplex mode of transmission.

Synchronization:
the session maintains proper connectivity between systems and if any error occurs then its provide a recovery option which is called a known state.

Authentication:
the process of identification is known as authentication it takes a guarantee from the users to permit than access to the data.

Authorization:
it Grants privilege after authentication of the user. Authorizations means providing access to the data that is authorized to the specific user.

Protocols of the session layer:

PPTP:
It stands for point to point panelling protocols this is a technique used to implement VPN with the help of PPT data can be transmitted securely from one or to another through a tunnel.

RTCP:
it stands for real time transport protocol it is used to provide audio and video over the internet.

PAP:
password authentication protocol the point 2 call use it to authenticate the user.

ADSP:
AppleTalk Data Stream Protocol. A systems administration convention was presented a long time back, in 1985, and was made for Apple Mac organizations.