WLAN Installation & Configuration Flashcards

When mounting an indoor access point on a ceiling, what is the recommended minimum clearance from metal HVAC ducts?

Answer: 3 feet

A minimum of 3 feet clearance from metal HVAC ducts is recommended to avoid RF interference and signal reflection.

Which 802.11 amendment introduced MU-MIMO for both uplink and downlink?

Answer: 802.11ax

802.11ax (Wi-Fi 6) introduced uplink and downlink MU-MIMO, whereas 802.11ac supported only downlink MU-MIMO.

A technician needs to connect an AP to a switch port that carries multiple VLANs. What switch port mode should be configured?

Answer: Trunk mode

Trunk mode allows the switch port to carry tagged traffic for multiple VLANs, which the AP uses for multiple SSIDs.

What is the purpose of configuring a management VLAN on an access point?

Answer: To isolate management traffic from user data traffic

A management VLAN isolates AP configuration and control traffic from client data traffic for security and stability.

During a WLAN site survey, a technician notices the received signal strength drops from -65 dBm to -80 dBm over a short distance. What is the most likely cause?

Answer: An obstruction such as a wall or door

A sudden drop in RSSI over a short distance typically indicates a physical obstruction absorbing or reflecting RF energy.

Which encryption protocol replaced TKIP in WPA2 to provide stronger data protection?

Answer: CCMP/AES

WPA2 uses CCMP (Counter Mode with Cipher Block Chaining Message Authentication Code Protocol) based on AES, replacing the weaker TKIP.

An AP is configured to use 40 MHz channel bonding on the 2.4 GHz band. What is the primary drawback of this configuration?

Answer: Increased co-channel interference with neighboring networks

The 2.4 GHz band has only three non-overlapping 20 MHz channels, so 40 MHz bonding causes significant overlap and co-channel interference.