The document presents information about the OSI model from Abu Bakar Siddik ID: 141-19-1536, Al-Amin Prince ID: 141-19-1539, and Mst. Tamanna Yeasmin ID: 141-19-1548 from the Department of ETE at Daffodil International University. It describes the seven layers of the OSI model, including the physical, data link, network, transport, session, presentation, and application layers, and provides examples of functions for each layer such as data encoding, frame acknowledgment, logical-physical address mapping, session establishment and maintenance, data compression, and remote file access.

1. PRESENTED BY:
1. Abu Bakar Siddik ID: 141-19-1536
2. Al-Amin Prince ID: 141-19-1539
3. Mst. Tamanna Yeasmin ID: 141-19-1548
Department of ETE
Daffodil International University
TOPIC: OSI Model

2. OSI Model
 Introduction
 The Open Systems Interconnection (OSI) model
is a reference tool for understanding data
communications between any two networked
systems.
 There are also some benefits of OSI Model.

3. Seven Layers

4. The Physical Layer
 Physical Layer is responsible for transmitting row bit
stream over the physical cable.
 Functions:
o Data encoding
o Transmission technique
o Physical medium transmission

5. Data link Layer
 Data link layer is responsible for controlling the
error between adjacent nodes and transfer the
frames to other computer via physical layer.
 Functions:
o Link establishment and termination
o Frame traffic control
o Frame acknowledgment

6. The Network Layer
 This layer is responsible for translating the logical
network address and names into their physical
address.
 Functions :
o Subnet traffic control
o Logical-physical address mapping
o Frame fragmentation

7. The Transport Layer
 This layer is responsible for end-to-end delivers of
messages between the networked hosts
 Functions:
o Message segmentation
o Message acknowledgment
o Session multiplexing

8. The Session Layer
 This layer is responsible for establishing the
process-to-process communication between the
hosts in the network.
 Functions:
o Session establishment, maintenance and
termination
o Session support

9. The Presentation Layer
 The Presentation layer is responsible for protocol
conversion, date encryption/decryption,
Expanding graphics command and the date
compression.
 Functions:
o Character code translation
o Data conversion
o Data compression

10. The Application Layer
 The application layer provider different services to
the application.
 Functions:
o Remote file access
o Electronic messaging
o Directory services
o Network management

11. Thank
you