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1.0 Network Infrastructure and Connectivity

Wireless Fundamentals Practice Questions

Updated for CCNA v2.0

802.11 operation, WLAN architecture, roaming, channels, and enterprise security.

Author-reviewed by LabFabric · 6 September 2026 · Report a content issue

One solved question, so you can see how these are marked

Which IEEE standard family defines Wi-Fi?

802.11

IEEE 802.11 defines wireless LAN technologies; 802.3 is Ethernet and 802.1Q is VLAN tagging.

Every question in the set below is marked like this. The answers stay hidden until you pick one.

Find related practice in the CCNA path
All 9 Wireless Fundamentals questions in this set

Answers and explanations appear when you work through the set above.

  1. What does an SSID identify?

    • The wireless network name
    • An AP radio MAC address
    • A VLAN tag
    • An encryption key

  2. What is the usual role of a lightweight access point in a controller-based WLAN?

    • Radio access under centralized WLC management and policy
    • WAN routing between remote branch sites using wireless backhaul routes
    • Assign public IP addresses
    • Replace a DHCP server

  3. Why are non-overlapping channels important in a WLAN design?

    • Reduce adjacent-channel interference among nearby APs
    • They increase Ethernet MTU
    • They eliminate authentication
    • Permit maximum transmit power on all APs without any co-channel contention

  4. Which security approach is strongest for an enterprise WLAN with individual user credentials?

    • WPA2/WPA3 Enterprise with individual 802.1X credentials
    • Open authentication with a user-password captive portal
    • WEP
    • A shared SSID only

  5. What is a BSSID normally associated with?

    • The MAC identifier of a basic service set
    • The DNS suffix assigned to every wireless client in the service set
    • A client IP address
    • A VLAN native ID

  6. What is roaming in a wireless LAN?

    • A client associates with a new AP
    • An AP changing management IP between controller groups
    • A controller reboots and restores its saved WLAN configuration
    • A switch moving a MAC address between VLANs

  7. Which band generally offers more non-overlapping channels than 2.4 GHz?

    • 5 GHz
    • 900 MHz
    • Bluetooth only
    • AM radio

  8. What does CAPWAP carry in a centrally switched Cisco controller-based WLAN?

    • Control and data tunnels between lightweight APs and the WLC
    • A Layer 2 protocol to prevent loops between APs and WLCs
    • A WAN routing protocol
    • A wireless encryption cipher

  9. Why should AP transmit power be planned instead of simply maximized?

    • Excess power can worsen interference and roaming
    • It disables WPA3
    • It changes the SSID
    • Higher power prevents DHCP leases by changing the UDP port used by wireless clients