Mostly ________ is used in wireless LAN.
a) time division multiplexing
b) orthogonal frequency division multiplexing
c) space division multiplexing
d) channel division multiplexing

1 Answer

Answer :

b) orthogonal frequency division multiplexing

Related questions

Description : Which one of the following event is not possible in wireless LAN? a) collision detection b) acknowledgement of data frames c) multi-mode data transmission d) connection to wired networks

Last Answer : a) collision detection

Description : What is the access point (AP) in a wireless LAN? a) device that allows wireless devices to connect to a wired network b) wireless devices itself c) both device that allows wireless devices to connect to a wired network and wireless devices itself d) all the nodes in the network

Last Answer : a) device that allows wireless devices to connect to a wired network

Description : Wireless networks are extremely hostile and random nature of radio channel. a) True b) False

Last Answer : a) True

Description : In wireless network an extended service set is a set of ________ a) connected basic service sets b) all stations c) all access points d) connected access points

Last Answer : a) connected basic service sets

Description : PSTN is ___________ and wireless networks are ________ a) Highly dynamic, virtually static b) Static, virtually static c) Highly dynamic, virtually dynamic d) Virtually static, highly dynamic

Last Answer : d) Virtually static, highly dynamic

Description : How do you transmit through multiplexing, a thousand of voice channel information over a single fiber optic using on e wavelength? A. Polar division B. Time division C. Fiber division D. Frequency division

Last Answer : B. Time division

Description : LAN? a) CDMA b) CSMA/CA c) ALOHA d) CSMA/CD

Last Answer : b) CSMA/CA

Description : What is the range of asynchronous user data rates provided by HIPER-LAN? a) 1-100 Mbps b) 50-100 Mbps c) 1-20 Mbps d) 500 Mbps to 1 Gbps

Last Answer : c) 1-20 Mbps

Description : HIPER-LAN stands for ____________ a) High Precision Radio Local Area Network b) High Performance Radio Local Area Network c) High Precision Radio Land Area Network d) Huge Performance Radio Link Access Node

Last Answer : b) High Performance Radio Local Area Network

Description : Which of the following is not a standard of WLAN? a) HIPER-LAN b) HIPERLAN/2 c) IEEE 802.11b d) AMPS

Last Answer : d) AMPS

Description : In PCM encoding, quantization level varies as a function of ________ a) Frequency b) Amplitude c) Square of frequency d) Square of amplitude

Last Answer : b) Amplitude

Description : Which of the following is oldest multiplexing scheme? A. Frequency Division Multiplexing (FDM) B. Time Division Multiplexing (TDM) C. Code Division Multiplexing (CDM) D. Space Division Multiplexing (SDM)

Last Answer : D. Space Division Multiplexing (SDM)

Description : What is Wired Equivalent Privacy (WEP)? a) security algorithm for ethernet b) security algorithm for wireless networks c) security algorithm for usb communication d) security algorithm for emails

Last Answer : b) security algorithm for wireless networks

Description : A wireless network interface controller can work in _______ a) infrastructure mode b) ad-hoc mode c) both infrastructure mode and ad-hoc mode d) WDS mode

Last Answer : c) both infrastructure mode and ad-hoc mode

Description : In wireless distribution system __________ a) multiple access point are inter-connected with each other b) there is no access point c) only one access point exists d) access points are not required

Last Answer : a) multiple access point are inter-connected with each other

Description : In wireless ad-hoc network _________ a) access point is not required b) access point is must c) nodes are not required d) all nodes are access points

Last Answer : a) access point is not required

Description : The price of WLAN hardware is more than 3G telephones and fixed wireless equipment. a) True b) False

Last Answer : b) False

Description : What is WISP? a) Wideband Internet Service Protocol b) Wireless Internet Service Provider c) Wireless Instantaneous Source Provider d) Wideband Internet Source Protocol

Last Answer : b) Wireless Internet Service Provider

Description : What is the full form of WLAN? a) Wide Local Area Network b) Wireless Local Area Network c) Wireless Land Access Network d) Wireless Local Area Node

Last Answer : b) Wireless Local Area Network

Description : In 2007 ____________ announced its plan to transmit its network to 4G standard LTE with joint efforts of Vodafone group. a) Verizon Wireless b) AirTouch c) Netflix d) V Cast

Last Answer : a) Verizon Wireless

Description : In a wireless communication, base station is connected to central hub called _______ a) PSTN b) MSC c) CO d) PBX

Last Answer : b) MSC

Description : AIN has different telephone numbers for both wireline and wireless services. a) True b) False

Last Answer : b) False

Description : How many voice channels are supported for each 30 KHz radio channel in IS-136? a) Eight b) Thirty c) Three d) Sixteen

Last Answer : c) Three

Description : How many users or voice channels are supported for each 200 KHz channel in GSM? a) Eight b) Three c) Sixty four d) Twelve

Last Answer : a) Eight

Description : What is the raw channel bit error rate of Bluetooth? a) 10-3 b) 10-10 c) 103 d) 10-1

Last Answer : a) 10-3

Description : What is the channel symbol rate in Bluetooth for each user? a) 270.833 Kbps b) 1 Gbps c) 100 Mbps d) 1 Mbps

Last Answer : d) 1 Mbps

Description : Which of the following channel is used by base station to provide forward link communication to mobile? a) RACH b) AGCH c) DCCH d) PCH

Last Answer : b) AGCH

Description : ___________ is a reverse link channel used by a subscriber unit to acknowledge. a) RACH b) AGCH c) DCCH d) PCH

Last Answer : a) RACH

Description : Which of the following channel provides paging signals from base station to all mobiles in the cell? a) RACH b) AGCH c) DCCH d) PCH

Last Answer : d) PCH

Description : Which of the following channel does not come under CCCH? a) PCH b) RACH c) DCCH d) AGCH

Last Answer : c) DCCH

Description : Which of the following is the forward control channel that is used to broadcast information? a) BCCH b) CCCH c) DCCH d) TCH

Last Answer : a) BCCH

Description : Which of the following is not a control channel of GSM? a) BCH b) CCCH c) DCCH d) TCH

Last Answer : d) TCH

Description : Which of the following does not come under subsystem of GSM architecture? a) BSS b) NSS c) OSS d) Channel

Last Answer : d) Channel

Description : Cdma2000 1xEV was developed by ________ a) Motorola b) AT&T Laboratories c) Qualcomm d) NTT

Last Answer : c) Qualcomm

Description : Quantization noise can be reduced by ________ the number of levels. a) Decreasing b) Increasing c) Doubling d) Squaring

Last Answer : b) Increasing

Description : In IPv4 layer, datagram is of ________ a) Fixed length b) Variable length c) Global length d) Zero length

Last Answer : b) Variable length

Description : Network layer at source is responsible for creating a packet from data coming from another ________ a) Station b) Link c) Node d) Protocol

Last Answer : d) Protocol

Description : PSTN stands for ________ a) Public switched telephone network b) Personal switched telephone network c) Personal switched telephone node d) Public switched telephone node

Last Answer : a) Public switched telephone network

Description : hich of the following burst is used to broadcast the frequency and time synchronization control messages? a) FCCH and SCH b) TCH and DCCH c) RACH and TCH d) FCCH and DCCH

Last Answer : a) FCCH and SCH

Description : Used for time division multiplexing. A. Frequency modulation B. Pulsed modulation C. SSB D. Amplitude modulation

Last Answer : B. Pulsed modulation

Description : A good example of a pilot tone system used in commercial frequency modulation stations. A. FDM B. Time division C. Stereo multiplexing D. Frequency modulation

Last Answer : C. Stereo multiplexing

Description : Which of the following scheme is used by Bluetooth? a) Frequency hopping TDD scheme b) Frequency hopping FDD scheme c) DSSS TDD scheme d) DSSS FDD scheme

Last Answer : a) Frequency hopping TDD scheme

Description : FDM stands for: a) Frequency Division Multiplexing b) Fidelty Division Multiplexing c) Fast Division Multiplexing d) None of These

Last Answer : a) Frequency Division Multiplexing

Description : An FDM hierarchy which is formed by frequency – division multiplexing 10 super groups together for a combined capacity of 600 voice band message channels.

Last Answer : Mastergroup

Description : An FDM hierarchy which is formed by frequency – division multiplexing five groups containing 12 channels each for a combined bandwidth of 240 kHz

Last Answer : Supergroup

Description : Pick up the correct statement from the following: (A) The minimum frequency of light for which no electrons are emitted, is called threshold frequency (B) Polarising angle of glass is 57.5° (C) At the polarising angle, the reflected and refracted rays are orthogonal (D) All the above

Last Answer : Answer: Option D

Description : What is the range of time slot in Bluetooth? a) 120 milliseconds b) 625 microseconds c) 577 microseconds d) 5.7 seconds

Last Answer : b) 625 microseconds

Description : Multiplexing in a time division multiplexer occurs based upon A. the position of a frame within the group of frames B. the positioning of data within a frame C. the priority assigned to a connected device D. the activity of a connected device

Last Answer : B. the positioning of data within a frame

Description : TDM stands for: a) Task Division Multiplexing b) Time Division Multiplexing c) Testing Division Multiplexing d) None of These

Last Answer : b) Time Division Multiplexing