UNIT I WIRELESS LAN

What is the access point (AP) in a wireless LAN?

• device that allows wireless devices to connect to a wired network
• wireless devices itself
• both device that allows wireless devices to connect to a wired network and wireless devices itself
• all the nodes in the network

In wireless ad-hoc network 

• access point is not required
• access point is must
• nodes are not required
• all nodes are access points

Which multiple access technique is used by IEEE 802.11 standard for wireless LAN?

• CDMA
• CSMA/CD
• ALOHA
•  CSMA/CA

In wireless network an extended service set is a set of 

• connected basic service sets
• all stations
• all access points
• connected access points

What is the name of 300 MHz of unlicensed spectrum allocated by FCC in ISM band?

• UNII
• Millimetre wave
• Unlicensed PCS
•  Bluetooth

Which of the following specifies a set of media access control (MAC) and physical layer specifications for implementing WLANs?

• IEEE 802.16
•  IEEE 802.3
• IEEE 802.11
• IEEE 802.15

Which of the following is the 802.11 High Rate Standard?

• IEEE 802.15
• IEEE 802.11b
•  IEEE 802.15.4
• IEEE 802.11g

Which of the following WLAN standard has been named Wi-Fi?

• DSSS IEEE 802.11b
• IEEE 802.6
• IEEE 802.15.4
•  IEEE 802.11g

WiMAX provides 

• simplex communication
• half duplex communication
• full duplex communication
• no communication

Which of the following modulation schemes is supported by WiMAX?

• binary phase shift keying modulation
• quadrature phase shift keying modulation
• quadrature amplitude modulation
•  all of the mentioned