Network Model Illustration

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Important Points about Network Model

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  • The International Standards Organization created a network model called the Open Systems Interconnection(OSI Network Model), which allows diverse systems to communicate.
  • The seven-layer OSI network model provides guidelines for the development of universally compatible networking protocols.
  • The physical, data link, and network layers in a network model are the network support layers.
  • The session, presentation, and application layers in a network model are the user support layers.
  • The transport layer in a network model links the network support layers and the user support layers.
  • The physical layer in a network model coordinates the functions required to transmit a bit stream over a physical medium.
  • The data link layer in a network model is responsible for delivering data units from one station to the next without errors.
  • The network layer in a network model is responsible for the source-to-destination delivery of a packet across multiple network links.
  • The transport layer in a network model is responsible for the process-to-process delivery of the entire message.
  • The session layer in a network model establishes, maintains, and synchronizes the interactions between communicating devices.
  • The presentation layer in a network model ensures interoperability between communicating devices through transformation of data into a mutually agreed upon format.
  • The application layer in a network model enables the users to access the network.
  • TCP/IP network model is a five-layer hierarchical protocol suite developed before the OSI network model.
  • The TCP/IP network model application layer is equivalent to the combined session, presentation, and application layers of the OSI network model.
  • Four levels of addresses are used in an internet following the TCP/IP protocols: physical (link) addresses, logical (IP) addresses, port addresses, and specific addresses.
  • The physical address, also known as the link address, is the address of a node as defined by its LAN or WAN.
  • The IP address uniquely defines a host on the Internet in a network model.
  • The port address identifies a process on a host in a network model.
  • A specific address is a user-friendly address.

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Network Model

Layered Tasks in a Network Model

Network Model: THE OSI MODEL

Network Model :: Physical Layer

Network Model :: Data Link Layer

Network Model :: Network Layer

Network Model :: Transport Layer

Network Model :: Session Layer

Network Model :: Presentation Layer

Network Model :: Application Layer

TCP/IP protocol suite in a Network Model

Addressing system in a Network Model

Important Points about Network Model

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