Description : UMTS use which multiple access technique? a) CDMA b) TDMA c) FDMA d) SDMA
Last Answer : a) CDMA
Description : A multiple access technique used in GSM cellular system A. TACS B. FDMA C. TDMA D. CDMA
Last Answer : C. TDMA
Description : W-CDMA works in FDD mode only. a) True b) False
Last Answer : b) False
Description : A method of multiple accessing where a given RF channel bandwidth is divided inot smaller frequency band. A. CDMA B. ANIK-D C. TDMA D. FDMA
Last Answer : D. FDMA
Description : The access method in Bluetooth is________. A) FDMA B) TDD-TDMA C) CDMA D) none of the above
Last Answer : TDD-TDMA
Description : Which one is not a TDMA standard of second generation networks? a) GSM b) IS-136 c) AMPS d) PDC
Last Answer : c) AMPS
Description : Which of the following is a CDMA standard of second generation network? a) IS-95 b) IS-136 c) ETACS d) EDGE
Last Answer : a) IS-95
Description : In_______, the sequences aregenerated using orthogonal codes such the Walsh tables. A) FDMA B) TDMA C) CDMA D) none of the above
Last Answer : CDMA
Description : ______ is based oncoding theory and uses sequencesof numbers called chips. A) FDMA B) TDMA C) CDMA D) none of the above
Description : In ______, the stations usedifferent codes toachieve multipleaccess. A) FDMA B) TDMA C) CDMA D) none of the above
Description : In_____, each station transmits its data in itsassignedtime slot. A) FDMA B) TDMA C) CDMA D) none of the above
Last Answer : TDMA
Description : In_____, each station is allocateda time slotduring which it can send data. Each stationtransmits its data in itsassigned time slot. A) FDMA B) TDMA C) CDMA D) none of the above
Description : In_______, the stations share thebandwidth of the channel in time. A) FDMA B) TDMA C) CDMA D) none of the above
Description : In________, the available bandwidth is divided into frequency bands. A) FDMA B) TDMA C) CDMA D) none of the above
Description : Which of the following is the world’s first cellular system to specify digital modulation and network level architecture? a) GSM b) AMPS c) CDMA d) IS-54
Last Answer : a) GSM
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 : Which of the following leads to the 3G evolution of GSM, IS-136 and PDC systems? a) W-CDMA b) GPRS c) EDGE d) HSCSD
Last Answer : a) W-CDMA
Description : Which of the following leads to evolution of 3G networks in CDMA systems? a) IS-95 b) IS-95B c) CdmaOne d) Cdma2000
Last Answer : d) Cdma2000
Description : What is the term used by ITU for a set of global standards of 3G systems? a) IMT 2000 b) GSM c) CDMA d) EDGE
Last Answer : a) IMT 2000
Description : _____ is used for transmission of packets in the cellular switched architecture. a) Packet switching techniques b) Circuit switching techniques c) Packet and circuit switched technique d) Datagram technique
Last Answer : a) Packet switching techniques
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 : How many users are supported by Cdma2000 1X in comparison to 2G CDMA standard? a) Half b) Twice c) Six times d) Ten times
Last Answer : b) Twice
Description : Within ITU IMT-2000 body, Cdma2000 1xRTT is also known as ____________ a) Cdma2000 1xEV-DO b) Cdma2000 1xEV-DV c) IS-95B d) G3G-MC-CDMA-1X
Last Answer : d) G3G-MC-CDMA-1X
Description : Which of the following the first 3G CDMA air interface? a) IS-95 b) IS-95B c) Cdma2000 1xRTT d) CdmaOne
Last Answer : c) Cdma2000 1xRTT
Description : 2G and 2.5G CDMA operators may selectively introduce 3G capabilities at each cell without changing entire base stations and reallocate spectrums. a) True b) False
Last Answer : a) True
Description : 2G CDMA standard, IS-95, was proposed by which company? a) Nippon Telephone and Telegraph (NTT) b) Qualcomm c) Bellcore and Motorola d) AT&T Bell Laboratories
Last Answer : b) Qualcomm
Description : Popular 2G CDMA standard IS-95 is also known as ______________ a) CdmaOne b) CdmaTwo c) IS-136 d) IS-95B
Last Answer : a) CdmaOne
Description : How much increase in spectral efficiency is provided by W-CDMA in comparison to GSM? a) Two times b) Three times c) No increase d) Six times
Last Answer : d) Six times
Description : W-CDMA requires a complete change of RF equipment at each base station. a) True b) False
Description : What is the minimum spectrum allocation required by W-CDMA? a) 5 MHz b) 20MHz c) 1.25 MHz d) 200 KHz
Last Answer : a) 5 MHz
Description : How much packet data rate per user is supported by W-CDMA if the user is stationary? a) 2.048 Kbps b) 100 Mbps c) 2.048 Mbps d) 1 Gbps
Last Answer : c) 2.048 Mbps
Description : What is the chip rate of W-CDMA? a) 1.2288 Mcps b) 3.84 Mcps c) 270.833 Ksps d) 100 Mcps
Last Answer : b) 3.84 Mcps
Description : UMTS is also known as _____________ a) IS-95 b) GPRS c) CdmaOne d) W-CDMA
Last Answer : d) W-CDMA
Description : What is 3GPP2? a) Project based on W-CDMA b) Project based on cdma2000 c) Project based on 2G standards d) Project based on 2.5G standards
Last Answer : b) Project based on cdma2000
Description : hat is 3GPP? a) Project based on W-CDMA b) Project based on cdma2000 c) Project based on 2G standards d) Project based on 2.5G standards
Last Answer : a) Project based on W-CDMA
Description : LAN? a) CDMA b) CSMA/CA c) ALOHA d) CSMA/CD
Last Answer : b) CSMA/CA
Description : Transmission protocol, PRMA stands for _________ a) Pocket reservation multiple access b) Packet register multiple access c) Pocket register multiple access d) Packet reservation multiple access
Last Answer : d) Packet reservation multiple access
Description : In______, each station is allocated a band to send its data. In other words, each band is reservedfor a specific station,and it belongs to the station all the time. A) FDMA B) TDMA C) CDMA D) none of the above
Last Answer : FDMA
Description : State advantages of TDMA over FDMA
Last Answer : 1. In TDMA since only one station is present at any given time so the crosstalk will avoided this is present in FDMA. 2. The entire channel band which can be allocated to signal channel at ... secure than FDMA. 8. Intermodulation products are absent as there is one carrier only in all time slots.
Description : Which of the following spread spectrum techniques were used in the original IEEE 802.11 standard? a) FHSS and DSSS b) THSS and FHSS c) THSS and DSSS d) Hybrid technique
Last Answer : a) FHSS and DSSS
Description : ________ requires that each station first listento the medium before sending. A) MA B) CSMA C) FDMA D) CDMA
Last Answer : CSMA
Description : In ______, the chanceof collisioncan be reduced if a station senses the medium beforetrying touse it. A) MA B) CSMA C) FDMA D) CDMA
Description : Compare TDMA and CDMA on the basis of sharing of time and B.W. Synchronization, code word ,guard band and guard time.
Last Answer : Sr. No Parameters TDMA CDMA 1 Sharing of time & B.W Sharing of time of satellite Transponder using entire BW Sharing of time and bandwidth both. 2 ... guard times and guard bands are required if it uses along with TDMA & FDMA. Otherwise not required.
Description : Distinguish between TDMA and CDMA
Last Answer : Sr. No. Parameter TDMA CDMA 1 Definition Entire bandwidth is shared among different subscribers at Fixed predetermined or dynamically assigned time intervals/slots. Entire bandwidth is ... phone, system(AMPS), Cordless telephone IS95 Wide band, CDMA 2000,2.5G and 3G
Description : Which of the following is not an application of third generation network? a) Global Positioning System (GPS) b) Video conferencing c) Mobile TV d) Downloading rate upto 1 Gbps
Last Answer : d) Downloading rate upto 1 Gbps
Description : Satellite-Switched Time-Division Multiple Access (SS/TDMA) is A. the method of determining whichdevice has access tothe transmission medium at any time. B. a medium access control technique for ... switching is used to dynamically changethechannel assignments D. All of theabove E. None of the above
Last Answer : a form of TDMA in which circuit switching is used to dynamically changethechannel assignments
Description : Which of the following is not a characteristic of 3G network? a) Communication over VoIP b) Unparalleled network capacity c) Multi-megabit Internet access d) LTE based network
Last Answer : d) LTE based network
Description : What is WPA? a) wi-fi protected access b) wired protected access c) wired process access d) wi-fi process access
Last Answer : a) wi-fi protected access
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 : 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