Learning Objectives

By the end of this chapter, you will be able to:

  • Define wireless networking.
  • Describe the key components of a Wireless LAN (WLAN).
  • Understand the importance of wireless security.
  • Identify the current standard for Wi-Fi security.

Wireless Networking

Wireless networking allows devices to connect to a network and communicate without the use of physical cables. The most common technology for wireless networking is Wi-Fi.

Wireless Local Area Network (WLAN)

A WLAN is a LAN that is created using wireless technology. The key components are:

  1. Access Point (AP): A device that broadcasts the wireless signal. In a home network, this is usually a wireless router.

  2. Wireless Network Interface Card (NIC): A component in each device (computer, smartphone, etc.) that allows it to connect to the wireless network.

Wireless Security

Because wireless signals are broadcast through the air, security is a major concern. It is essential to secure a wireless network to prevent unauthorized access. This is done using security protocols that encrypt the data and require a password.

  • WEP (Wired Equivalent Privacy): An old and insecure protocol that should never be used.
  • WPA (Wi-Fi Protected Access): An improvement over WEP.
  • WPA2: Was the standard for many years and is still widely used.
  • WPA3: The current and most secure standard, offering stronger encryption.

Summary

Wireless networking, most commonly implemented with Wi-Fi, allows devices to connect to a network without cables. A wireless LAN is created using an access point (router) that broadcasts a signal to devices with wireless NICs. Because these signals are broadcast through the air, security is critical. Modern networks should always be secured using the WPA3 protocol to protect against unauthorized access.

Key Takeaways

  • Wireless networking uses radio waves instead of cables.
  • Wi-Fi is the most common wireless networking technology.
  • A wireless network requires an access point and wireless NICs.
  • WPA3 is the current standard for securing wireless networks.

Discussion Questions

  1. What are the main advantages of a wireless network over a wired network?
  2. What are the risks of connecting to an unsecured public Wi-Fi network?
  3. How do you check what type of security your home Wi-Fi network is using?