Video Description

What is a computer network protocol?- Set of rules and agreements governing the communication process

  • Includes addressing, routing, session management, and error recovery processes

  • The traditional mail network as an example of a network with a protocol

  • The PSTN telephone network as another example

  • The mobile phone network

  • The layered model and its benefits

  • Computer networks protocols

    • NetBEUI, IPX/APX, Apple Talk, and the TCP/IP

TCP/IP- Standard protocol over Internet

  • ISO/OSI compatible

  • Provides interoperability between different hardware and software systems

  • Open for development and not vendor oriented

  • Provides reliability as well as best-effort delivery when needed

  • Composed of a number of protocols built over each other

  • Offers web browsing, file transfer, and e-mail exchange

  • Versions 4 and Version 6 are running

TCP/IP vs ISO/OSI- Merging of some layers to be 4 instead of 7

  • Merging the physical and data link into one layer called physical or network access layer

  • Keeping both the network and transport layers separate as they are

  • Merging the upper 3 layers into one layer called the application layer

  • TCP/IP is now the default protocol for any Microsoft, Linux, and many other operating systems

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