4. Wired LANs vs. Wireless LANs

Part 04 of Computer Networking Fundamentals: ⁣Wired Local Area Networks vs. Wireless Local Area Networks

Wired LANs vs Wireless LANs

At the end of this episode, I will be able to:

1. Compare and contrast wired and wireless LAN implementations.

Learner Objective: Identify the characteristics and importance of VLANs

Description: In this episode, the learner will be introduced to the basic constructs and characteristics of wired and wireless local area networks.

• Introduction to Network Infrastructure
  • Wired LAN
    • Devices in this type of LAN are connected using bounded media
    • Bounded media types
      • Copper - The most prevalent LAN-based network medium used today. This medium uses single or multiple copper conductors to transmited data.
      • Fiber - These medium uses an optical light source to transmit data through a concentrated core made of either plastic or glass.
    • For devices to communicate, they need to be physically connected via Ethernet switch
    • Due to the nature of the physical connections, wired networks can provide a higher level of security than wireless networks
    • Wired LANs can have constraints
      • Limitation of cabling (distance, electromagnetic interference, damage)
      • Building requirements (historical sites, cumbersome installations, proximity to the connectivity device)
      • Mobility is challenging
  • Wireless LAN
    • Devices in this type of LAN connect to the network via radiated energy
    • Wireless LAN Types
      • Infrastructure mode - In this type of Wireless LAN, a centralized network device called a wireless access point controls all communications on the network.
      • Ad-hoc mode - In this type of Wireless LAN there is no centralized connectivity device. The wireless devices communicate directly with each other.
    • Wireless LANs have become increasingly more popular due today because:
      • Ease of installation
      • Reduction of physical cabling
      • Mobility
      • Simplicity to add devices to network
    • Disadvantages
      • Communication eminations
      • Obstacles and interference
      • Network saturation and congestion
  • Hybrid LAN
    • Most common LAN deployment in modern networks today
    • This type of LAN combines both wired and wireless communication
    • Wired LAN
      • Workstations and servers (these are stationary devices)
    • Wireless LAN
      • Laptops, tablets, smartphones (these are devices that require mobility)
      • Any stationary device that requires a connection, but cabling is not feasible or possible