Sample Questions and Answers
Which Cisco wireless feature allows for centralized AP configuration and software updates?
A) Cisco Prime Infrastructure
B) CleanAir
C) WIPS
D) Band Select
Answer: A) Cisco Prime Infrastructure
Explanation: Prime Infrastructure provides centralized AP management and updates.
What is the purpose of the Cisco WLC’s Guest Anchor controller?
A) To handle guest client authentication and data forwarding when roaming across controllers
B) To assign IP addresses to guest clients
C) To monitor guest clients only
D) To block guest client traffic
Answer: A) To handle guest client authentication and data forwarding when roaming across controllers
Explanation: The Guest Anchor controller supports guest client mobility.
What is the maximum transmit power for 5 GHz APs in most regulatory domains?
A) 20 dBm
B) 30 dBm
C) 40 dBm
D) 10 dBm
Answer: A) 20 dBm
Explanation: Regulatory domains typically limit 5 GHz power to around 20 dBm (100 mW).
Which Cisco wireless feature optimizes channel width dynamically?
A) Band Select
B) CleanAir
C) Channel Width Management (CWM)
D) Radio Resource Management (RRM)
Answer: D) Radio Resource Management (RRM)
Explanation: RRM dynamically adjusts channel widths for optimal performance.
What Cisco wireless mode enables a standalone AP to function without a WLC?
A) Local mode
B) FlexConnect mode
C) Autonomous mode
D) Mesh mode
Answer: C) Autonomous mode
Explanation: Autonomous APs operate independently without a controller.
What is a key consideration when deploying 802.11ax (Wi-Fi 6) in an enterprise?
A) It operates only in the 2.4 GHz band
B) It requires support for OFDMA and MU-MIMO features
C) It is incompatible with WPA3
D) It cannot coexist with 802.11ac devices
Answer: B) It requires support for OFDMA and MU-MIMO features
Explanation: Wi-Fi 6 uses OFDMA and MU-MIMO for higher efficiency.
Which Cisco wireless component provides policy enforcement and posture assessment in a secure wireless environment?
A) Cisco ISE (Identity Services Engine)
B) Wireless LAN Controller
C) Cisco Prime Infrastructure
D) CleanAir
Answer: A) Cisco ISE (Identity Services Engine)
Explanation: Cisco ISE enforces security policies and device posture.
What is the main advantage of using 802.11ax over 802.11ac?
A) Higher power consumption
B) Improved spectral efficiency and higher throughput in dense environments
C) Exclusive 2.4 GHz operation
D) Only supports legacy clients
Answer: B) Improved spectral efficiency and higher throughput in dense environments
Explanation: 802.11ax is designed for better performance in crowded Wi-Fi areas.
What Cisco wireless feature enables seamless handoff between APs without client reauthentication?
A) 802.11d
B) 802.11r Fast BSS Transition
C) 802.1X
D) CleanAir
Answer: B) 802.11r Fast BSS Transition
Explanation: 802.11r reduces handoff latency for roaming clients.
Which Cisco wireless interface carries user data and control traffic?
A) Service Port
B) AP Manager Interface
C) Management Interface
D) Dynamic Interfaces (VLAN interfaces)
Answer: D) Dynamic Interfaces (VLAN interfaces)
Explanation: Dynamic interfaces handle client user and control traffic.
What is the primary purpose of Cisco FlexConnect mode?
A) To allow APs to function autonomously when connectivity to WLC is lost
B) To increase maximum client density on APs
C) To provide enhanced security with certificate-based authentication
D) To manage rogue AP detection
Answer: A) To allow APs to function autonomously when connectivity to WLC is lost
Explanation: FlexConnect APs can locally switch traffic and perform client authentication if connection to WLC is lost.
Which IEEE standard introduced OFDMA in Wi-Fi technology?
A) 802.11ac
B) 802.11ax
C) 802.11n
D) 802.11ad
Answer: B) 802.11ax
Explanation: OFDMA, which improves spectral efficiency, was introduced in Wi-Fi 6 (802.11ax).
Which Cisco wireless security feature protects against wireless denial-of-service attacks?
A) Rogue AP detection
B) RF Management
C) Dynamic ARP Inspection
D) Wireless Intrusion Prevention System (WIPS)
Answer: D) Wireless Intrusion Prevention System (WIPS)
Explanation: WIPS actively monitors and prevents wireless DoS and other attacks.
What happens when an AP on a Cisco WLC is configured with a wrong country code?
A) It uses default settings regardless
B) It may operate outside legal power and channel restrictions
C) The AP will not join the controller
D) Client associations will be disabled
Answer: B) It may operate outside legal power and channel restrictions
Explanation: Country code controls regulatory compliance for channels and transmit power.
What is the maximum number of SSIDs an AP can broadcast by default in Cisco wireless?
A) 8
B) 16
C) 32
D) 4
Answer: A) 8
Explanation: Cisco APs support up to 8 SSIDs by default.
Which Cisco WLC interface handles client DHCP requests?
A) Management Interface
B) Virtual Interface
C) AP Manager Interface
D) Service Port
Answer: B) Virtual Interface
Explanation: The virtual interface acts as the default gateway and DHCP relay for clients.
In Cisco wireless design, what is the typical recommended channel width for 2.4 GHz band?
A) 20 MHz
B) 40 MHz
C) 80 MHz
D) 160 MHz
Answer: A) 20 MHz
Explanation: To reduce interference, 20 MHz channel width is recommended in the crowded 2.4 GHz band.
Which of the following best describes Cisco’s CleanAir technology?
A) An RF management feature that avoids interference
B) A wireless intrusion detection system
C) A software for configuring wireless clients
D) An encryption method for wireless traffic
Answer: A) An RF management feature that avoids interference
Explanation: CleanAir detects and mitigates sources of RF interference.
What type of roaming requires the client to reauthenticate when moving between controllers?
A) Layer 2 roaming
B) Layer 3 roaming
C) Seamless roaming
D) Fast roaming
Answer: B) Layer 3 roaming
Explanation: Roaming between controllers in different subnets usually requires reauthentication.
What is the function of the Cisco WLC’s Management Interface?
A) To carry client user data traffic
B) To manage the WLC itself and allow admin access
C) To tunnel data from APs
D) To provide DHCP to clients
Answer: B) To manage the WLC itself and allow admin access
Explanation: The management interface is for device management and monitoring.
How does Cisco’s Band Select feature improve wireless performance?
A) By forcing dual-band clients to 2.4 GHz
B) By steering dual-band clients to 5 GHz to reduce 2.4 GHz congestion
C) By disabling 5 GHz radios in dense areas
D) By load balancing wired client traffic
Answer: B) By steering dual-band clients to 5 GHz to reduce 2.4 GHz congestion
Explanation: Band Select improves performance by balancing client load across bands.
What encryption protocol is mandatory for WPA3?
A) TKIP
B) AES-CCMP
C) WEP
D) None of the above
Answer: B) AES-CCMP
Explanation: WPA3 mandates the use of AES-CCMP for stronger encryption.
Which Cisco WLC mode allows centralized client authentication but local switching of client data?
A) Local mode
B) FlexConnect mode
C) Monitor mode
D) Sniffer mode
Answer: B) FlexConnect mode
Explanation: FlexConnect supports local switching and centralized authentication.
What is the role of Cisco ISE in wireless network security?
A) It is the wireless controller firmware
B) It is a RADIUS server that provides centralized authentication and policy enforcement
C) It manages AP configurations
D) It monitors RF interference
Answer: B) It is a RADIUS server that provides centralized authentication and policy enforcement
Explanation: Cisco Identity Services Engine handles authentication and access control.
Which wireless standard supports multi-user MIMO?
A) 802.11n
B) 802.11ac Wave 2
C) 802.11g
D) 802.11a
Answer: B) 802.11ac Wave 2
Explanation: MU-MIMO was introduced in 802.11ac Wave 2 to improve multi-client throughput.
What is the primary purpose of the Cisco WLC Dynamic Interface?
A) To serve as a static IP interface
B) To provide a VLAN interface for wireless client traffic segregation
C) To manage the WLC firmware updates
D) To assign IP addresses to APs
Answer: B) To provide a VLAN interface for wireless client traffic segregation
Explanation: Dynamic interfaces map wireless VLANs for client traffic segmentation.
Which Cisco wireless feature allows administrators to block access to unauthorized wireless devices?
A) Rogue AP detection
B) Client Exclusion List
C) CleanAir
D) Band Select
Answer: B) Client Exclusion List
Explanation: The client exclusion list blocks or limits access for specific wireless clients.
What is the maximum number of clients supported per Cisco 2800 Series AP?
A) 50
B) 100
C) 200
D) 300
Answer: B) 100
Explanation: Cisco 2800 Series APs support up to 100 clients per radio.
What does the Cisco WLC use to tunnel wireless client data to the controller?
A) GRE tunnels
B) CAPWAP tunnels
C) IPsec tunnels
D) MPLS tunnels
Answer: B) CAPWAP tunnels
Explanation: CAPWAP is the protocol used between APs and WLC for control and data.
Which Cisco wireless security option provides the highest level of security?
A) WPA2-PSK
B) WPA2-Enterprise with EAP-TLS
C) WPA-PSK
D) WEP
Answer: B) WPA2-Enterprise with EAP-TLS
Explanation: EAP-TLS with WPA2 offers strong mutual certificate-based authentication.
What is the purpose of Cisco’s Fast SSID Change feature?
A) To enable clients to roam faster by quickly switching between SSIDs on the same AP
B) To increase SSID broadcast power
C) To reduce the number of SSIDs supported by APs
D) To enable simultaneous SSID broadcast
Answer: A) To enable clients to roam faster by quickly switching between SSIDs on the same AP
Explanation: Fast SSID Change reduces latency during SSID switching.
Which type of antenna is typically used in Cisco APs for directional coverage?
A) Omnidirectional
B) Patch antenna
C) Dipole antenna
D) Yagi antenna
Answer: B) Patch antenna
Explanation: Patch antennas provide directional coverage commonly used in Cisco APs.
What is the recommended channel spacing for 5 GHz Wi-Fi channels?
A) 5 MHz
B) 10 MHz
C) 20 MHz
D) 20 MHz or 40 MHz depending on deployment
Answer: D) 20 MHz or 40 MHz depending on deployment
Explanation: 5 GHz supports 20 MHz or 40 MHz channels; wider channels increase throughput but may increase interference.
In Cisco wireless design, what does the term “anchor controller” mean?
A) The primary WLC for client authentication and session management during guest roaming
B) A backup WLC for redundancy
C) The controller with the highest client load
D) A controller dedicated to AP firmware upgrades
Answer: A) The primary WLC for client authentication and session management during guest roaming
Explanation: The anchor controller terminates tunneled guest traffic during roaming.
What does the Cisco WLC use to ensure high availability of controllers?
A) AP Manager Interface
B) Mobility Group and Redundancy Protocol
C) Dynamic Interfaces
D) Rogue AP Detection
Answer: B) Mobility Group and Redundancy Protocol
Explanation: Cisco Mobility Groups and protocols support failover and redundancy.
What Cisco wireless technology provides load balancing by directing clients to less congested APs?
A) CleanAir
B) Band Select
C) Client Load Balancing
D) Dynamic ARP Inspection
Answer: C) Client Load Balancing
Explanation: Load balancing distributes client associations across APs to optimize performance.
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