Computer Networking Complete Course

Networks are like human communication

• Verbal communication
  • Same language
  • Be able to hear each other
  • Loud noises: Tell the other to repeat themselves
  • Understand somewhat: ask for clarification
  • Speak to only one person/speak to a group
  • A way of greeting and closing a conversation
• Protocol: the above set standards

Introduction to Networking

The TCP/IP Five-Layer Network Model

 

•  Physical Layer
  • Represents the physical devices that connects computers
  • Cabling
• Data link Layer
  • Defining a common way of interperating these signals
  • Ethernet
• Network Layer
  • Lets computers communicate with each other through routers
  • *Data link: data across a single link/Network layer: across a collection of networks
  • IP
• Transport Layer
  • Sorts out which client and server programs should get the data
  • TCP
• Application Layer
  • Application specific