Wi-Fi and wireless quiz

Channels 1, 6 and 11 are the classic non-overlapping set. Using other channels in between causes interference.

5 GHz has more channels and higher speeds but does not travel as far or through walls as well as 2.4 GHz.

Wi-Fi 4 is 802.11n, Wi-Fi 5 is 802.11ac, Wi-Fi 6/6E is 802.11ax and Wi-Fi 7 is 802.11be.

The SSID is the name of the wireless network that devices see when they scan.

WEP was broken many years ago and can be cracked in minutes. Use WPA3, or WPA2 with AES if WPA3 is not available.

Signal is measured in negative dBm; closer to zero is stronger. Around -67 dBm or better is a common target for voice and video.

Enterprise mode gives each user their own credentials or certificate, checked by a RADIUS server, so access can be revoked per person.

An evil twin tricks devices into connecting to the attacker. Enterprise authentication with certificate checks and user awareness help defend against it.

WPS PIN mode has known weaknesses that let attackers recover the network key. Turn WPS off.

A separate guest SSID and VLAN with internet-only access keeps unknown devices away from company systems.

Wi-Fi 6E extends Wi-Fi 6 into the 6 GHz band, which has many more clean channels.

MLO lets Wi-Fi 7 devices send and receive across multiple links, such as 5 GHz and 6 GHz, together.

Mesh systems use multiple nodes, managed as one network, to extend coverage with roaming between them.

WPA3-Personal uses Simultaneous Authentication of Equals (SAE), which resists offline password guessing.

Interference and many users sharing airtime slow Wi-Fi even with strong signal. More APs or 5/6 GHz help.

A WLC pushes configuration, handles roaming and monitors the APs, either on-site or in the cloud.

Band steering nudges dual-band clients onto the faster, less crowded bands.

Hidden SSIDs still appear in client probes and management frames. Use strong encryption instead.

Microwaves, Bluetooth and many gadgets share the crowded 2.4 GHz band.

A wireless site survey measures signal and interference so APs are placed and tuned for good coverage.