PPT 1 PART 2

• Communication


  Traverses networks via various media, providing channels for messages from source to destination
• Modern network media types


  • Metal wires within cables
  • Glass or plastic fibers within cables (fiber-optic cable)
  • Wireless transmission
• Metal wires within cables


  Encode data into electrical impulses
• Glass or plastic fibers within cables (fiber-optic cable)


  Encode data into pulses of light
• Wireless transmission


  Encode data via modulation of specific frequencies of electromagnetic waves
• Network diagrams


  Illustrate network components, connections, and layouts
• Network diagrams


  Employ symbols to represent devices and connections within a network
• Network Interface Card (NIC)


  Physically connects end devices to the network
• Physical Port


  Connector or outlet on a networking device where media connects to end devices or other networking devices
• Interface


  Specialized ports on networking devices that connect to individual networks; on routers, these ports are referred to as network interfaces
• Physical Topology Diagrams


  • Illustrate physical locations of intermediary devices and cable installations
  • Rooms where devices are located are labeled
• Logical Topology Diagrams


  • Illustrate devices, ports, and addressing schemes of the network
  • Show connections between end devices and intermediary devices, along with the media being used