OSI Model Presentation(Data communication)

Osi model Presentation

1. BS Telecommunication System Session : 23-27(Morning) Topic : OSI MODEL Group A Mubeen Zahid Zain Haider M . Faizan Hamza Khan Abdullah Mehboob M. Taha Habib Khan Submitted To : Ma’am Sadia Subject : Introduction to telecommunication Roll No BSTS-23-09 BSTS-23-30 BSTS-23-22 BSTS-23-11 BSTS-23-31 BSTS-23-04 BSTS-23-24

2. The OSI Model OSI stands for Open Systems Interconnection . It has been developed by ISO – ‘International Organization of Standardization‘, in the year 1974 . It is a 7 layer architecture with each layer having specific functionality to performed . All these 7 layers work collaboratively to transmit the data from one device to another across the globe.

3. Physical Layer 1 Physical Specs Defines physical and electrical specifications 2 Transmission Media Cables, wireless, fiber optics, etc. 3 Encoding/Signaling Converts data into electrical signals Uses Responsible for the physical and electrical specifications of the network, including cables, connectors, and signal transmission Purpose Ensures the reliable transfer of data bits between devices. Examples Ethernet cables, coaxial cables, optical fibers, and radio waves

4. Data Link Layer Error Detection Identifies and corrects errors Access Control Regulates access to shared media Framing Packages data into frames Uses Responsible for the reliable and error-free transfer of data frames between directly connected devices. Purpose Ensures the accurate delivery of data by detecting and correcting errors that may occur in the Physical layer. Examples Media Access Control (MAC) addresses, Ethernet, and Wi-Fi.

5. Network Layer IP Addressing Assigns logical addresses Routing Determines best path for data Packet Switching Breaks data into packets Logic Circuits Manages network traffic

6. Transport Layer 1 Flow Control Manages data rate between devices 2 Error Correction Ensures reliable data delivery 3 Segmentation Breaks data into smaller packets Uses Responsible for end-to-end communication and the reliable transfer of data between applications. Purpose Ensures that data is delivered in the correct order, without errors, and without loss. Examples Transmission Control Protocol (TCP) and User Datagram Protocol (UDP).

7. Session Layer Checkpoint Establishes & maintains sessions Synchronization Coordinates communication Recovery Restarts interrupted sessions Purpose Ensures the smooth and continuous flow of data between applications, even in the event of system failures or interruptions. Uses Responsible for establishing, maintaining, and synchronizing communication sessions between applications Examples Session management protocols like RPC and SQL

8. Presentation Layer Data Formatting Converts data to common format Encryption/Decryption Secures data transfer Compression Reduces data size for efficiency

9. Application Layer HTTP Web browsing SMTP Email FTP File transfer DNS Domain name resolution