Q#1: Wireless LAN (WLAN) allows:
(A) Wireless devices to communicate within a local area
(B) Wired-only communication
(C) Wide-area network communication
(D) None
Answer: (A) Wireless devices to communicate within a local area
Q#2: WLAN standards are defined by:
(A) IEEE 802.11
(B) IEEE 802.3
(C) ISO 9001
(D) None
Answer: (A) IEEE 802.11
Q#3: Frequency bands used in WLAN include:
(A) 2.4 GHz and 5 GHz
(B) 10 GHz only
(C) 100 MHz only
(D) None
Answer: (A) 2.4 GHz and 5 GHz
Q#4: WLAN devices include:
(A) Access points, wireless NICs
(B) Switches only
(C) Routers only
(D) None
Answer: (A) Access points, wireless NICs
Q#5: Basic Service Set (BSS) contains:
(A) One access point and associated stations
(B) All WLANs
(C) Only wired devices
(D) None
Answer: (A) One access point and associated stations
Q#6: Extended Service Set (ESS):
(A) Multiple BSS interconnected via distribution system
(B) Single BSS
(C) Only wired LAN
(D) None
Answer: (A) Multiple BSS interconnected via distribution system
Q#7: WLAN access methods include:
(A) CSMA/CA
(B) CSMA/CD
(C) Token passing
(D) None
Answer: (A) CSMA/CA
Q#8: CSMA/CA stands for:
(A) Carrier Sense Multiple Access with Collision Avoidance
(B) Collision Detection
(C) Time Division Access
(D) None
Answer: (A) Carrier Sense Multiple Access with Collision Avoidance
Q#9: Purpose of CSMA/CA:
(A) Avoid collisions in wireless networks
(B) Detect collisions in wired LAN
(C) Multiplex signals
(D) None
Answer: (A) Avoid collisions in wireless networks
Q#10: Hidden node problem occurs when:
(A) Two nodes cannot sense each other but can reach the access point
(B) Two nodes collide intentionally
(C) Only in wired LANs
(D) None
Answer: (A) Two nodes cannot sense each other but can reach the access point
Q#11: Solution to hidden node problem:
(A) RTS/CTS (Request to Send / Clear to Send)
(B) CSMA/CD
(C) Token passing
(D) None
Answer: (A) RTS/CTS (Request to Send / Clear to Send)
Q#12: WLAN data rates include:
(A) 1 Mbps, 2 Mbps, 11 Mbps, 54 Mbps, 150 Mbps, 300 Mbps
(B) Only 10 Mbps
(C) 100 Mbps
(D) None
Answer: (A) 1 Mbps, 2 Mbps, 11 Mbps, 54 Mbps, 150 Mbps, 300 Mbps
Q#13: 802.11b standard uses:
(A) 2.4 GHz, up to 11 Mbps
(B) 5 GHz
(C) 1 GHz
(D) None
Answer: (A) 2.4 GHz, up to 11 Mbps
Q#14: 802.11a standard uses:
(A) 5 GHz, up to 54 Mbps
(B) 2.4 GHz
(C) 10 Mbps only
(D) None
Answer: (A) 5 GHz, up to 54 Mbps
Q#15: 802.11g standard uses:
(A) 2.4 GHz, up to 54 Mbps
(B) 5 GHz
(C) 1 Mbps
(D) None
Answer: (A) 2.4 GHz, up to 54 Mbps
Q#16: 802.11n standard supports:
(A) MIMO (Multiple Input Multiple Output), higher throughput
(B) Single antenna
(C) Only 11 Mbps
(D) None
Answer: (A) MIMO (Multiple Input Multiple Output), higher throughput
Q#17: 802.11ac standard uses:
(A) 5 GHz, wider channels, higher throughput
(B) 2.4 GHz only
(C) Fiber optic
(D) None
Answer: (A) 5 GHz, wider channels, higher throughput
Q#18: Wireless LAN security protocols include:
(A) WEP, WPA, WPA2, WPA3
(B) HTTP, FTP
(C) IP only
(D) None
Answer: (A) WEP, WPA, WPA2, WPA3
Q#19: WEP (Wired Equivalent Privacy) weakness:
(A) Vulnerable to attacks
(B) Strong security
(C) No encryption
(D) None
Answer: (A) Vulnerable to attacks
Q#20: WPA improves:
(A) Encryption and integrity over WEP
(B) Speed only
(C) Collision detection
(D) None
Answer: (A) Encryption and integrity over WEP
Q#21: WPA2 uses:
(A) AES encryption
(B) DES encryption
(C) CRC only
(D) None
Answer: (A) AES encryption
Q#22: WPA3 improves:
(A) Security, forward secrecy
(B) Data rate
(C) CSMA/CD
(D) None
Answer: (A) Security, forward secrecy
Q#23: SSID (Service Set Identifier):
(A) Network name
(B) MAC address
(C) IP address
(D) None
Answer: (A) Network name
Q#24: Ad-hoc mode allows:
(A) Direct peer-to-peer communication without access point
(B) Only access point connection
(C) Wired LAN only
(D) None
Answer: (A) Direct peer-to-peer communication without access point
Q#25: Infrastructure mode requires:
(A) Access point
(B) Direct peer-to-peer
(C) Coaxial cable
(D) None
Answer: (A) Access point
Q#26: Roaming in WLAN allows:
(A) Station moves between access points
(B) Station remains static
(C) Only wired devices
(D) None
Answer: (A) Station moves between access points
Q#27: Beacon frame in WLAN:
(A) Broadcasts network presence and timing
(B) Transmits data only
(C) Collision detection
(D) None
Answer: (A) Broadcasts network presence and timing
Q#28: Association in WLAN:
(A) Connecting a station to an access point
(B) Sending data only
(C) CSMA/CD
(D) None
Answer: (A) Connecting a station to an access point
Q#29: Disassociation occurs when:
(A) Station leaves access point
(B) Station joins AP
(C) Collision occurs
(D) None
Answer: (A) Station leaves access point
Q#30: Authentication in WLAN ensures:
(A) Only authorized users access network
(B) Detects collisions
(C) Bandwidth allocation
(D) None
Answer: (A) Only authorized users access network
Q#31: MAC filtering restricts access based on:
(A) MAC addresses
(B) IP addresses
(C) Frequency
(D) None
Answer: (A) MAC addresses
Q#32: WLAN antennas types:
(A) Omnidirectional, directional
(B) Coaxial only
(C) Fiber only
(D) None
Answer: (A) Omnidirectional, directional
Q#33: Omnidirectional antenna:
(A) Radiates signal in all directions
(B) Radiates signal in one direction
(C) Only wired
(D) None
Answer: (A) Radiates signal in all directions
Q#34: Directional antenna:
(A) Focuses signal in one direction
(B) All directions
(C) Only 2.4 GHz
(D) None
Answer: (A) Focuses signal in one direction
Q#35: WLAN interference sources include:
(A) Microwave ovens, cordless phones, other WLANs
(B) Only wired LAN
(C) Fiber only
(D) None
Answer: (A) Microwave ovens, cordless phones, other WLANs
Q#36: WLAN throughput depends on:
(A) Distance, interference, protocol
(B) Only cable
(C) Only MAC address
(D) None
Answer: (A) Distance, interference, protocol
Q#37: RTS/CTS helps to:
(A) Avoid collisions
(B) Increase data rate
(C) Reduce IP addresses
(D) None
Answer: (A) Avoid collisions
Q#38: WLAN roaming protocol is part of:
(A) IEEE 802.11
(B) IEEE 802.3
(C) TCP/IP
(D) None
Answer: (A) IEEE 802.11
Q#39: WLAN MAC layer performs:
(A) Frame delivery, error control, access control
(B) Only physical signaling
(C) Routing
(D) None
Answer: (A) Frame delivery, error control, access control
Q#40: WLAN PHY layer deals with:
(A) Modulation, radio signals, frequency
(B) Error control
(C) MAC addresses
(D) None
Answer: (A) Modulation, radio signals, frequency
Q#41: WLAN IEEE 802.11e provides:
(A) Quality of Service (QoS)
(B) Encryption
(C) MAC addresses
(D) None
Answer: (A) Quality of Service (QoS)
Q#42: WLAN IEEE 802.11i defines:
(A) Security enhancements (WPA2)
(B) QoS
(C) Speed only
(D) None
Answer: (A) Security enhancements (WPA2)
Q#43: WLAN IEEE 802.11n provides:
(A) MIMO, higher throughput
(B) Only single antenna
(C) 10 Mbps
(D) None
Answer: (A) MIMO, higher throughput
Q#44: WLAN 802.11ac uses:
(A) Wider channels (80-160 MHz), MU-MIMO
(B) Single antenna
(C) 10 Mbps
(D) None
Answer: (A) Wider channels (80-160 MHz), MU-MIMO
Q#45: Power-saving mode in WLAN allows:
(A) Stations to sleep when idle
(B) Always active
(C) Wired only
(D) None
Answer: (A) Stations to sleep when idle
Q#46: Beacon interval defines:
(A) Time between beacon frames
(B) Time to transmit data
(C) Only access point delay
(D) None
Answer: (A) Time between beacon frames
Q#47: WLAN roaming requires:
(A) Handoff between access points
(B) Always same AP
(C) Wired cable
(D) None
Answer: (A) Handoff between access points
Q#48: WLAN CSMA/CA uses:
(A) DCF (Distributed Coordination Function)
(B) TCP
(C) UDP
(D) None
Answer: (A) DCF (Distributed Coordination Function)
Q#49: Optional WLAN MAC function:
(A) PCF (Point Coordination Function) for polling
(B) CSMA/CD
(C) FDMA
(D) None
Answer: (A) PCF (Point Coordination Function) for polling
Q#50: Primary goal of WLAN:
(A) Flexible, wireless LAN connectivity
(B) Wired LAN only
(C) Wide-area connection only
(D) None
Answer: (A) Flexible, wireless LAN connectivity