Comparing TCP/IP and OSI Models PDF
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This document compares the TCP/IP and OSI models, highlighting their structural differences, focus, approach, and usage in network communication. It details the functions of each layer in both models, and discusses application, transport, internet/network, and link/network interface layers. It's a good resource for understanding networking concepts.
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(4) Comparing TCP_IP to the OSI Model Exported Comparison of TCP/IP and OSI Models ◦ Structural Differences ▪ TCP/IP model consists of four layers: Link, Internet, Transport, Application. ▪ OSI model has seven layers: Physical, Data Link, Network, Transport, Session, Pres...
(4) Comparing TCP_IP to the OSI Model Exported Comparison of TCP/IP and OSI Models ◦ Structural Differences ▪ TCP/IP model consists of four layers: Link, Internet, Transport, Application. ▪ OSI model has seven layers: Physical, Data Link, Network, Transport, Session, Presentation, Application. ◦ Focus and Approach ▪ TCP/IP is more practical, used in real-world network implementations and protocol development. ▪ OSI is theoretical, serving as a detailed reference model for understanding network functions. ◦ Usage and Application ▪ TCP/IP is widely adopted in actual network communication systems. ▪ OSI model is used more as an educational tool to explain and understand how different network layers interact. Comparison of the layers ◦ Application Layer ▪ TCP/IP - Combines OSI's Application, Presentation, and Session layers, handling high-level protocols, representation, and session management. ▪ OSI - Separate Application, Presentation, and Session layers, with more distinct functions for each layer. ◦ Transport Layer ▪ TCP/IP Transport Layer deals with end-to-end communication (TCP, UDP). ▪ OSI Transport Layer ensures reliable data transfer and correct data sequencing. ◦ Internet/Network Layer ▪ TCP/IP Internet Layer manages logical addressing and routing (IP). ▪ OSI Network Layer handles routing, addressing, and data packet forwarding. ◦ Link/Network Interface Layer ▪ TCP/IP Link Layer is responsible for physical network hardware and media access control. ▪ OSI Data Link Layer provides node-to-node data transfer and error correction. ◦ OSI-Specific Layers ▪ OSI Session Layer (absent in TCP/IP) manages sessions and dialogues between applications. ▪ OSI Presentation Layer (absent in TCP/IP) translates data for the Application Layer. ▪ OSI Physical Layer corresponds to the Network Interface Layer in TCP/IP, dealing with physical aspects of network communication.
