CompTIA Core 1 Module 7-3d Setting up a Wireless Network A+ Core 1

Wi-Fi Ranges for each standard

802.11a. Short range up to 50 meters with radio frequency of 5.0 GHz 802.11b - Longer range of 100 meters (indoor ranges are less than outdoor ranges) and radio frequency of 2.4 GHz 802.11g - Same range and frequency as 802.11b but with faster speeds up to 54 Mbps 802.11n - Can use either 5.0-GHz or 2.4-GHz radio frequency with an indoor range up to 70 meters and an outdoor range up to 250 meters 802.11ac - Uses the 5.0-GHz radio frequency and has the same ranges as 802.11n, except performance stays stronger at the edges of its reach

WPA (Wi-Fi Protected Access)

A data encryption method for wireless networks that use the TKIP (Temporal Key Integrity Protocol) encryption method. The encryption keys are changed at set intervals while the wireless LAN is in use. WPA is stronger than WEP.

WPA2 (Wi-Fi Protected Access 2)

A data encryption standard compliant with the IEEE802.11i standard that uses the AES (Advanced Encryption Standard) protocol. WPA2 is currently the strongest wireless encryption standard.

Wi-Fi Protected Setup (WPS)

A method to make it easier for users to connect their computers to a secured wireless network when a hard-to-remember SSID and security key are used. WPS is considered a security risk that should be used with caution.

Channel

A specific radio frequency within a broader frequency.

WPA 3 (Wi-Fi Protected Access 3)

A standard that offers improved data encryption over WPA2 and allows for Individual Data Encryption, whereby a laptop or other wireless device can create a secure connection over a public, unsecured Wi-Fi network.

Wireless LAN (WLAN)

A type of LAN that does not use wires or cables to create connections, but instead transmits data over radio or infrared waves.

WEP (Wired Equivalent Privacy)

An encryption protocol used to secure transmissions on a Wi-Fi wireless network; however, it is no longer considered secure because the key used for encryption is static (it doesn't change).

Wireless QoS

Earlier, you learned you can improve QoS for a device, online game, or other application by assigning it to a high-priority list. In addition, for wireless devices, you can further improve QoS by enabling WMM (Wi-Fi Multimedia). When WMM is enabled, the wireless access point will prioritize wireless traffic for audio, video, and voice over other types of wireless network traffic. For one sample router, look back at Figure 7-45. When you click Settings on this router firmware page, the Settings box shown in Figure 7-57 appears. Turn on WMM Support and click OK. The Roku shown in Figure 7-45 is already prioritized as a device. Now multimedia traffic on the Wi-Fi network has priority.

Service Set Identifier (SSID)

The name of a wireless access point and wireless network.

What are the three 802.11 security standards for wireless networks?

WEP - WEP (Wired Equivalent Privacy) is no longer considered secure because the key used for encryption is static (it doesn't change). WPA - WPA (Wi-Fi Protected Access) is stronger than WEP and was designed to replace it. WPA typically uses TKIP (Temporal Key Integrity Protocol, pronounced tee-kip) for encryption. TKIP generates a different key for every transmission; however, the encryption algorithm used for its calculations is no longer considered secure. WPA2 - WPA2 (Wi-Fi Protected Access 2), also called the 802.11i standard, is the current wireless security standard. WPA2 typically uses AES (Advanced Encryption Standard) for encryption, which provides faster and more secure encryption than TKIP. All wireless devices sold today support the WPA2 standard. WPA3 - WPA3 (Wi-Fi Protected Access 3) offers better encryption and additional features over WPA2. For example, you can securely configure a nearby wireless device, such as a wireless webcam or motion sensor, over the wireless network, eliminating the need to connect the device with a wired connection to configure it. Another feature is Individual Data Encryption, which allows a secure connection for your laptop or other wireless device over a public, unsecured Wi-Fi network.

What to keep in ind about radio power levels and WAP placement?

You've already learned that an access point should be placed in a central location to maximize its range in the target area. This also minimizes the signal's reach outside of the target area, which increases security. A wireless signal that reaches to public areas, such as a parking lot or the street, invites unauthorized users to park nearby and take their time attempting to crack your wireless security measures. Some high-end access points allow you to adjust the radio power levels the wireless network can use. To reduce interference, save on electricity, or limit the range of the network to your own property, reduce the power level.