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OPEN SYSTEMS
INTERCONNECTION
(OSI) MODEL
PRESENTATION BY KAVYA GUPTA
JAGANNATH INSTITUTE OF
MANAGEMENT SCIENCES, VK-2
TABLE OF CONTENTS
Here are some of the
advantages of the OSI Model
04
Here the differences between
OSI and TCP/IP Model
05
Ending presentation on
overall analysis of OSI Model
06
Here you could find that what open
systems interconnection means?
01
Here I mentioned about
the OSI Model – 7 layers
02
Here I describe
the topic of the section indiuvally
03
About the Project
OSI MODEL– 7 LAYERS
Detail view of 7 layers
Advantages of topic
OSI vs. TCP/IP Model
Conclusion
OPEN SYSTEMS
INTERCONNECTION
The Open Systems Interconnection (OSI) model describes seven
layers that computer systems use to communicate over a network.
It was the first standard model for network communications,
adopted by all major computer and telecommunication companies
in the early 1980s.
The modern Internet is not based on OSI, but on the simpler TCP/IP
model. However, the OSI 7-layer model is still widely used, as it
helps visualize and communicate how networks operate, and helps
isolate and troubleshoot networking problems.
OSI was introduced in 1983 by representatives of the major
computer and telecom companies, and was adopted by ISO as an
international standard in 1984.
OSI MODEL – 7 LAYERS
PHYSICAL LAYER
The physical layer is responsible
for the physical cable or wireless
connection between network
nodes. It defines the connector,
The electrical cable or wireless
technology connecting the
devices , and is responsible for
transmission of the raw data,
which is simply a series of 0s and
1s, while taking care of bit rate
control.
DATA LINK LAYER
The data link layer establishes and
terminate a connection between two
physically-connected nodes on a network.
It breaks up packets into frames and
sends them from source to destination.
This layer is composed of two parts
Logical Link Control (LLC), which
identifies network protocols, performs
error checking and synchronizes frames,
and Media Access Control (MAC) which
uses MAC addresses to connect devices
and define permissions to transmit and
receive data.
NETWORK LAYER
The network layer has two main
functions. One is breaking up
segments into network packets,
and reassembling the packets
on the receiving end. The other
is routing packet by discovering
the best path across a physical
network. The network layer uses
network addresses (typically
Internet Protocol addresses) to
route packets to a destination
node.
TRANSPORT LAYER
The transport layer takes data
transferred in the session layer
and breaks it into “segments” on
the transmitting end. It is
responsible for reassembling the
segments on the receiving end,
turning it back into data that
can be used by the session layer.
The transport layer carries out
flow control, sending data at a
rate that match's the connection
speed of the receiving device,
and error control, checking if
data was received incorrectly
and if not, requesting it again.
SESSION LAYER
The session layer creates
communication channels, called
sessions, between devices. It is
responsible for opening sessions,
ensuring they remain open and
functional while data is being
transferred, and closing them
when communication ends. The
session layer can also set
checkpoints during a data
transfer—if the session is
interrupted, devices can resume
data transfer from the last
checkpoint.
PRESENTATION LAYER
The presentation layer prepares
data for the application layer. It
defines how two devices should
encode, encrypt, and compress
data so it is received correctly
on the other end. The presentation
layer takes any data transmitted by
the application layer and prepares
it for transmission over the session
layer.
APPLICATION LAYER
The application layer is used by end
user software such as web browsers
and email clients. It provide protocols
that allow software to send and
receive information and present
meaningless data to users . A few
examples of application layer
protocols are the Hypertext Transfer
Protocol (HTTP), File Transfer
Protocol (FTP), Post Office Protocol
(POP), Simple Mail Transfer Protocol
(SMTP), and Domain Name System
(DNS).
. Determine the required hardware and software to
build their network.
. Understand and communicate the process
followed by components communicating across
a network.
. Perform troubleshooting, by identifying which
network layer is causing an issue and focusing
efforts on that layer.
ADVANTAGES OF OSI MODEL
The OSI model helps users and operators of computer networks:
OSI MODEL vs. TCP/IP MODEL
TCP/IP is a functional model designed to solve
specific communication problem, and which is
based on specific, standard protocols. OSI is a
generic, protocol-independent model intended
to describe all form of network
communication.
In TCP/IP, most applications use all the layers,
while in OSI simple applications do not use all
seven layers. Only layers 1, 2 and 3 are
mandatory to enable any data
communication.
CONCLUSION
Overall , this presentation I had tried
to describe the OSI model ,what is it
all about and how communications
occurs through the layers of the
model from one user to another user.
THANK YOU!
“Words full of wisdom that someone
important said and can make the
reader get inspired.”

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OSI MODEL

  • 1. OPEN SYSTEMS INTERCONNECTION (OSI) MODEL PRESENTATION BY KAVYA GUPTA JAGANNATH INSTITUTE OF MANAGEMENT SCIENCES, VK-2
  • 2. TABLE OF CONTENTS Here are some of the advantages of the OSI Model 04 Here the differences between OSI and TCP/IP Model 05 Ending presentation on overall analysis of OSI Model 06 Here you could find that what open systems interconnection means? 01 Here I mentioned about the OSI Model – 7 layers 02 Here I describe the topic of the section indiuvally 03 About the Project OSI MODEL– 7 LAYERS Detail view of 7 layers Advantages of topic OSI vs. TCP/IP Model Conclusion
  • 3. OPEN SYSTEMS INTERCONNECTION The Open Systems Interconnection (OSI) model describes seven layers that computer systems use to communicate over a network. It was the first standard model for network communications, adopted by all major computer and telecommunication companies in the early 1980s. The modern Internet is not based on OSI, but on the simpler TCP/IP model. However, the OSI 7-layer model is still widely used, as it helps visualize and communicate how networks operate, and helps isolate and troubleshoot networking problems. OSI was introduced in 1983 by representatives of the major computer and telecom companies, and was adopted by ISO as an international standard in 1984.
  • 4. OSI MODEL – 7 LAYERS
  • 5. PHYSICAL LAYER The physical layer is responsible for the physical cable or wireless connection between network nodes. It defines the connector, The electrical cable or wireless technology connecting the devices , and is responsible for transmission of the raw data, which is simply a series of 0s and 1s, while taking care of bit rate control.
  • 6. DATA LINK LAYER The data link layer establishes and terminate a connection between two physically-connected nodes on a network. It breaks up packets into frames and sends them from source to destination. This layer is composed of two parts Logical Link Control (LLC), which identifies network protocols, performs error checking and synchronizes frames, and Media Access Control (MAC) which uses MAC addresses to connect devices and define permissions to transmit and receive data.
  • 7. NETWORK LAYER The network layer has two main functions. One is breaking up segments into network packets, and reassembling the packets on the receiving end. The other is routing packet by discovering the best path across a physical network. The network layer uses network addresses (typically Internet Protocol addresses) to route packets to a destination node.
  • 8. TRANSPORT LAYER The transport layer takes data transferred in the session layer and breaks it into “segments” on the transmitting end. It is responsible for reassembling the segments on the receiving end, turning it back into data that can be used by the session layer. The transport layer carries out flow control, sending data at a rate that match's the connection speed of the receiving device, and error control, checking if data was received incorrectly and if not, requesting it again.
  • 9. SESSION LAYER The session layer creates communication channels, called sessions, between devices. It is responsible for opening sessions, ensuring they remain open and functional while data is being transferred, and closing them when communication ends. The session layer can also set checkpoints during a data transfer—if the session is interrupted, devices can resume data transfer from the last checkpoint.
  • 10. PRESENTATION LAYER The presentation layer prepares data for the application layer. It defines how two devices should encode, encrypt, and compress data so it is received correctly on the other end. The presentation layer takes any data transmitted by the application layer and prepares it for transmission over the session layer.
  • 11. APPLICATION LAYER The application layer is used by end user software such as web browsers and email clients. It provide protocols that allow software to send and receive information and present meaningless data to users . A few examples of application layer protocols are the Hypertext Transfer Protocol (HTTP), File Transfer Protocol (FTP), Post Office Protocol (POP), Simple Mail Transfer Protocol (SMTP), and Domain Name System (DNS).
  • 12. . Determine the required hardware and software to build their network. . Understand and communicate the process followed by components communicating across a network. . Perform troubleshooting, by identifying which network layer is causing an issue and focusing efforts on that layer. ADVANTAGES OF OSI MODEL The OSI model helps users and operators of computer networks:
  • 13. OSI MODEL vs. TCP/IP MODEL TCP/IP is a functional model designed to solve specific communication problem, and which is based on specific, standard protocols. OSI is a generic, protocol-independent model intended to describe all form of network communication. In TCP/IP, most applications use all the layers, while in OSI simple applications do not use all seven layers. Only layers 1, 2 and 3 are mandatory to enable any data communication.
  • 14. CONCLUSION Overall , this presentation I had tried to describe the OSI model ,what is it all about and how communications occurs through the layers of the model from one user to another user.
  • 15. THANK YOU! “Words full of wisdom that someone important said and can make the reader get inspired.”