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Right CHOICE is (d) Switching Technique

Easiest explanation: GPRS is a packet based network. HSCSD dedicates circuit switched channels to specific users whereas GPRS SUPPORTS MANY more users, but in a bursty MANNER.

Correct answer is (b) Sixty four

Explanation: IS-95 supports upto 64 users which are ORTHOGONALLY CODED and simultaneously transmitted on each 1.25 MHz. The services of IS-95 STANDARD are short messaging service, SLOTTED paging, over-the-air activation, enhanced mobile station IDENTITIES etc.

Right choice is (a) IS-95

The EXPLANATION: Interim Standard 95 (IS-95) is the most popular CDMA standard of second generation networks. IS-136 is a TDMA standard of 2G. EDGE is a standard of 2.5G and ETACS is a 1G standard.

The CORRECT answer is (b) High Performance Radio Local Area Network

Best explanation: HIPER-LAN stands for High Performance Radio Local Area Network. It was DEVELOPED in Europe in MID 1990S. It was intended to provide individual wireless LANs for computer COMMUNICATION.

Right choice is (b) GPRS

Easiest explanation: 3G Cdma2000 is based on the original IS-95 and IS-95A CDMA standards, as well as the 2.5G IS-95B air interface. While upgrading, Cdma2000 maintains backward compatibility with existing IS-95, IS-95A and IS-95B equipments. Thus, Cdma2000 ALLOW wireless carriers to INTRODUCE a FAMILY of new HIGH data rate INTERNET access capabilities within existing systems.

Right choice is (d) Limited Internet Browsing

To EXPLAIN I would SAY: 2G technologies USE circuit SWITCHED data modems that limits data users to a single circuit switched VOICE channel. The advantages of 2G network are that they are digital in nature and supports SMS service.

Correct answer is (b) Qualcomm

Explanation: IS-95 was proposed by Qualcomm in EARLY 1990s. LATER it was adopted as a standard by Telecommunications Industry ASSOCIATION in TIA/EIA/IS-95 release PUBLISHED in 1995.

Right option is (a) Universal Mobile TELEPHONE System

For explanation I would say: UMTS (Universal Mobile Telephone System) is a visionary AIR interface standard that was INTRODUCED in 1996. EUROPEAN carriers, manufacturers, and government regulators collectively developed the early VERSION of UMTS as an open air interface standard for third generation wireless telecommunication.

Correct choice is (d) VPN

For EXPLANATION: An open standard is a standard that is publicly available. It has various rights to use associated with it. Bluetooth is an open standard that has been embraced by over thousand manufacturers of electronic appliances. VPN (VIRTUAL Private Network) is a private network.

Correct answer is (a) UNII

To elaborate: FCC allocated 300 MHz of UNLICENSED SPECTRUM in the ISM bands. This allocation is called the Unlicensed National Information Infrastructure (UNII) BAND. It was allocated for the express purpose of supporting low power license FREE spread spectrum DATA communication.

The correct option is (a) CLUBBING adjacent radio channels

For explanation: The increase in the BANDWIDTH is ACHIEVED through clubbing the adjacent radio channels of CdmaOne and USING multicarrier technologies. For example, Cdma2000 3xRTT uses these technologies by combining THREE adjacent 1.25 MHz bandwidth of CdmaOne channels.

Right option is (b) Project based on cdma2000

For explanation I would say: 3GPP2 is a 3G Partnership Project for Cdma2000 standards based on backward compatibility with earlier CdmaOne 2G CDMA TECHNOLOGY. It was initiated by IMT-2000 to cover high speed, BROADBAND and Internet Protocol (IP) based mobile SYSTEMS. It mainly focuses on North American and Asian regions.

Right choice is (a) Frequency hopping TDD scheme

To explain I WOULD SAY: Frequency hopping TDD (Time Division Duplexing) scheme is used by Bluetooth. Frequency hopping PROVIDES a form of multiple ACCESS among co-located devices in different piconets.

Right choice is (C) Qualcomm

To explain I would say: Cdma2000 is an evolutionary advancement for CDMA. It was developed by Qualcomm INC. It is a proprietary high data rate (HDR) packet standard that can be OVERLAID UPON existing IS-95, IS-95B and Cdma2000 NETWORKS.

The correct answer is (c) 2.048 Mbps

The best explanation: If the user is stationary, W-CDMA supports PACKET data rates upto 2.048Mbps PER user. Thus, it allows high QUALITY data, MULTIMEDIA, streaming AUDIO video and broadcast type services to consumers. Future version of WCDMA will support stationary user data rates in excess of 8Mbps.

The correct option is (a) Year

The best I can explain: The International Telecommunication Union (ITU) DEFINED the THIRD generation (3G) of mobile telephony standards, IMT-2000 to facilitate growth, increase bandwidth, and support more DIVERSE applications. The number 2000 in IMT-2000 indicates the start of the system (year 2000) and the SPECTRUM USED (around 2000 MHz).

The correct answer is (c) DSSS IEEE 802.11b

Explanation: The DSSS IEEE 802.11b STANDARD has been NAMED Wi-Fi by the Wireless Ethernet Compatibility ALLIANCE. It is a group that promotes ADOPTION of 802.11 DSSS WLAN.

Correct option is (c) IEEE 802.11

The best I can explain: IEEE 802.11 is a set of media ACCESS control and physical layer specification for implementing WLAN computer communication. It was FOUNDED in 1987 to BEGIN standardization of spread spectrum WLANs for use in the ISM bands.

The correct option is (C) Cdma2000 1xEV-DO

The best explanation: Cdma2000 1xEV-DO option provides data RATES of about 2.4 MBPS and SUPPORTS data traffic only. No voice communication is supported. It relaxes the minimum latency requirement. But this mode is not backward compatible with Cdma2000.

Right CHOICE is (b) IEEE 802.15

To elaborate: IEEE 802.15 standards committee is formed to provide an international forum for developing Bluetooth and other PANs. PANs are USED to interconnect POCKET PCs, PERSONAL digital assistants (PDAs), cell phones, light PROJECTORS and other appliances.

Right choice is (c) 1-20 Mbps

Easiest EXPLANATION: HIPER-LAN provides asynchronous user data rates of between 1 to 20 Mbps, as well as time BOUNDED messaging of rates of 64 KBPS to 2.048 Mbps. It uses 5.2 GHZ and 17.1 GHz frequency BANDS.

Right option is (d) G3G-MC-CDMA-1X

For explanation: Cdma2000 1xRTT is also known as G3G-MC-CDMA-1X. The INITIALS MC STAND for multicarrier. RTT stand for Radio Transmission Technology, a language SUGGESTED by IMT-2000 BODY. Usually, MC and RTT are omitted for convenience.

The correct OPTION is (d) IEEE 802.11b

Best explanation: IEEE 802.11b was a high RATE STANDARD APPROVED in 1999. It provided new data rate capabilities of 11 Mbps, 5.5 Mbps in addition to the original 2 Mbps and 1 Mbps user rates of IEEE 802.11.

Right option is (d) Downloading RATE UPTO 1 Gbps

To explain: 3G applications include GPS (Global Positioning SYSTEM), MMS (Multimedia Messaging System), video conferencing, LOCATION based services, video on demand, wireless voice telephony and high data rates with peak downloading rate of 100 Mbps. For 4G networks, the peak downloading rate is 1 Gbps.

Right answer is (d) LTE based network

Explanation: Multi-megabit Internet access, communication using Voice over internet Protocol (VoIP), voice activated calls, unparalleled network capacity are some of the CHARACTERISTICS of 3G network. 3G systems promise unparalleled WIRELESS access which is not possible in 2G systems. LTE (Long term Evolution) is a standard of 4G systems.

The CORRECT answer is (d) W-CDMA

The explanation: UMTS USES Wideband CDMA (W-CDMA) to carry the radio transmissions. Therefore, it is ALSO referred as W-CDMA. W-CDMA offers greater spectral EFFICIENCY and BANDWIDTH to mobile network operators.

Correct answer is (b) I-mode

For explanation I WOULD say: I-mode is a wireless data service and Internet microbrowser TECHNOLOGY introduced by NTT DoCoMo on its PDC network in 1998. It is currently used by other wireless SERVICES THROUGHOUT the WORLD.

Correct answer is (C) Group Special Mobile

The explanation: GSM was EARLIER KNOWN as Group Special Mobile. As it became more global, the meaning of acronym was changed to Global System for Mobile.

The correct answer is (a) EIGHT

The explanation is: GSM is a circuit SWITCHED system that divides each 200 KHZ channel into eight 25 KHz time slots, i.e. each radio channel is divided into eight voice channels.