- Both, OSI vs TCP/IP are the most popular and widely used communication networking protocols.
- The main difference between them is that OSI is a conceptual model that is not practically used for communication. It defines how the data is transferred in a network or different architectures.
- Whereas TCP/IP is widely used for link establishment and network interaction. The TCP/IP also allows the connection mode on the network layer only, but these two methods are on the transport layer.
- With the OSI model, it promotes connection-free and connection-oriented network communication, but connection-oriented communication is only permitted in the transport layer.
OSI Model
- The OSI Model is a conceptual model developed by the International Organization for Standardization that allows various communication systems to communicate through standard protocols.
Application layer
- This is the only layer that interacts directly with user data.
- However, it should be noted that software applications are not components of the application layer; the application layer is accountable for protocols and information manipulation on which the software users are relying to obtain significant information.
Presentation Layer
- The primary task of this layer is to prepare the information so that the application layer can be used, that is to say, that layer 6 makes the information available for consumption apps.
- Two communicators may use different encryption methods to communicate so that the incoming data is converted to a syntax which the receiving device application layer can understand.
Session layer
- This is the layer used to open and close the communication between the two machines.
- The period between the opening and closing of the correspondence is known as the session.
Transport Layer
- Flow Control and error control is responsible for this layer.
- The transportation layer checks the receiving end for errors in ensuring the completeness of the received data and requests re-transmission if not.
Network Layer
- The network layer allows the transfer of information between two distinct networks.
- The network layer also identifies the best physical route for the information to reach its destination.
Data Link Layer
- The data link layer collects packets from the layer and breaks them into smaller parts.
- Like the network layer, the flow control and error control in interconnected communication is responsible for the data link layer.
Physical Layer
- This layer contains physical devices, such as wires and switching, involved in information transfer.
- This is also the string of 1s and 0s, where the information becomes a bit stream.
TCP/IP Model
- Internet Protocols are the rules set established for network communication. TCP/IP is considered a robust networking protocol model. It is the condensed version of the OSI Model.
Network Access Layer:
- Network Access Layer is the combination of Data Link Layer and Physical Layer available in the OSI model.
- Physical Addressing is done in this layer i.e. MAC Address of source and destination is assigned to the data packets. Hence this layer is responsible for the physical transmission of data.
Internet Layer:
- The Internet layer is used to send an independent packet to a network to the destination.
- All the machines, Web servers, nodes that are attached to the TCP/IP network are assigned in this layer.
Transport layer:
- It allows the information to be delivered in information chart format from the source to the destination host without defects.
Application Layer:
- Application layer performs the tasks of the OSI model in three layers: Application, Presentation and Session Layer.
- It is required for the interaction between node and node and handles the requirements of the user interface.
- Protocols available in the Application Layer are TFTP, HTTP, Telnet, SSH, NTP, DNS, NFS, FTP, SNMP, DHCP, SMTP.
- Key Differences between OSI Model vs TCP/Ip Model
Let us discuss some of the major differences between OSI Model vs TCP/IP Model
- The horizontal approach is known to the OSI and the vertical approach is called the TCP/IP approach.
- OSI is protocol-independent and generic, while TCP/IP has normal laws that support Internet development.
- As compare to OSI model TCP/IP model is more reliable
- Packages are supplied to the OSI transport layer whereas in the event of TCP/IP this is not sure.
- In the OSI model, a presentation and session layer is available while the TCP/IP model does not contain such a layer.
- TCP/IP implements the features that operate the system, OSI helps guide the network and serves as reference tools
- TCP/IP offers network-level connectivity facilities whereas the OSI network layer offers both connection and connection less services.
- No other model is TCP/IP, while OSI is attempting to match other model designs because it is a reference.
- Protocols can be easily terminated, while the original rules are in the TCP/IP model, new can be introduced in the OSI model.
