3 hours 38 minutes

Video Description

Computer Networks Media Types- Wired media (cables)

  • Copper cables

    • Coaxial cables
    • Twisted pair cables

      - Shielded (STP)/Unshielded (UTP)
  • Fiber optic cables

    • Single mode/Multi-mode
  • Wireless media (Air)

Coaxial Cables- High capacity cables

  • Used for video transfer
  • Two types

    • Thick coaxial cable (thicknet)

      • ½ inch diameter
      • 10base5
    • Thin coaxial cable (Thinnet)

      • ¼ inch diameter
      • 10base2
  • Use BNC connector

Shielded Twisted Pair (STP) Cables- Protected

  • Hard to install
  • RJ45
  • Crimper Tool

Unshielded Twisted Pair (UTP) Cables- Most commonly used type

  • Easy to install
  • Less expensive
  • Electromagnetic interference
  • RJ45 connector
  • Crimper tool

Fiber Optic Cables- Faster than twisted pair and coaxial

  • Send data as light pulses over glass medium
  • Free of electromagnetic interference
  • Expensive
  • Hard to install
  • Used in submarine connections
  • More secure
  • Core carries the signals
  • Core made of plastic or glass
  • Cladding maintains the signal in the center of the core as the cable bends
  • Sheathing protects the cladding and the core
  • Advantages

    • Total immune to the EMI
    • Highly resistance to Eavesdropping
    • Support extremely high data transfer rate
    • Allow grater cable distances without repeater
  • Disadvantages

    • Very expensive
    • Difficult to work with

Fiber Optic Cables Modes- Single Mode

  • Transfer data through the core using a single light ray
  • The core diameter is around 9 microns
  • Supports a large amount of data
  • Cable length can extended a great distance
  • Multi-mode

    • Transfers the data through the core using multiple light rays
    • The core diameter is around 50 microns
    • Cable length are limited in distance compared to single mode

Wireless Media (Air)- WiFi Wireless Fidelity

  • Uses frequencies 2.4GHz or 5Ghz
  • Standards: a,b,g, and n
  • Access Point (AP) connecting devices
  • Mobility
  • Flexibility
  • Less secure

Up Next

Network Fundamentals

In this basic Network Fundamentals course, you will get an introduction to basic networking concepts to expand your knowledge about network security. You will get a complete overview of networks including wired and wireless computer networks, devices, and protocols.

Instructed By

Instructor Profile Image
Mohammad Adly
EC3 Manager at Information Technology Institute