ATE6123 Fundamental of Wireless Comm - Topic 4

Which IEEE standard is commonly known as Wi-Fi and is still widely used today?

• IEEE 802.15

• IEEE 802.3

• IEEE 802.11

• IEEE 802.16

Which access method is used at the Data Link Layer in WLANs?

• CSMA/CD

• TDMA

• FDMA

• CSMA/CA

What does an Access Point (AP) do in a wireless LAN?

• Acts as a wireless NIC

• Modulates data signals

• Bridges wireless traffic to a wired LAN

• Encrypts WLAN data

What is the frequency band used by IEEE 802.11b?

• 5 GHz

• 2.4 GHz

• 60 GHz

• 900 MHz

Which of the following best describes the Extended Service Set (ESS) in WLAN architecture?

• A single access point and several clients

• A peer-to-peer network without an access point

• Multiple BSSs connected through a distribution system

• A wired Ethernet LAN

What is the purpose of the SSID in a wireless network?

• To determine the data rate

• To act as a MAC address

• To identify the wireless network

• To provide a security key

Which of the following techniques is used in passive scanning for wireless clients?

• Broadcasting probe frames

• Sending RTS/CTS messages

• Receiving beacon frames from APs

• Hopping across different frequencies

What is a rogue access point (AP)?

• An access point with outdated firmware

• A legitimate AP configured incorrectly

• An unauthorized AP connected to the network

• An AP used only in public areas

What does MAC address filtering do in WLAN security?

• Encrypts data transmissions

• Filters content by IP address

• Grants or denies access based on device hardware address

• Hides the SSID from all users

Which of the following authentication methods does not require a password?

• Shared Key Authentication

• WPA2 Personal

• WPA3 Enterprise

• Open System Authentication