Introdution To Network Chapter 1.3.2 Why protocols are necessary in network communication

Rules that Govern communications

Content layer

Rules layer

Physical layer

Protocol for successful human communicates are ✅

  • Identification of send and receiver
  • Agreed on medium or channel
  • Appropriate communication mode such as written, spoken and illustration
  • Common language
  • Grammar and sentence structure
  • delivery speeds and timing

Network Protocols

The role of protocols

  • How the messages is formatted or structured
  • The process by which networking device shares information pathway with other networks
  • How and when error system messages are passed between devices
  • The setup or termination of data transfer sessions

Protocol Interaction

  • HTTP
  • TCP
  • IP
  • Host

Protocols suites and Industry standard

  • protocol suites is a set of protocols work together to provides comprehensive network communication services.

Developement of TCP/IP

Communication process

  • data user prepare the Hypertext Markup Language(HTML) page.
  • TCP transport layer break the data into segments and identifies each
  • IP sources and destination addresses are added, creating an IP Packet
    -Ethernet information is added creating the Ethernet Frame or Data link Frame

Communication process

  • Ethernet header is removed
  • IP then IP header
  • TCP then the transport layer header
  • Data user http information is processed and sent to client's web browser

The Reference OSI Model

  • Application
  • Presentation
  • Session
  • Transport
  • Network
  • Data Link
  • Physical

Similarity

OSI Model

TCP/IP Model

  • Shared a similar architecture
  • Share a common application layer
  • Both have a comparable transport and network layers
  • knowledge of both model is required by networking professionals