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Question 1 of 60 Quiz ID: q1

Which of the following is NOT a primary reason for using wireless networks?

Mobile devices that are not stationary

Nomadic access for users working in several places

Ad hoc networking for temporary peer-to-peer networks

Higher data transmission speeds compared to wired networks

Question 2 of 60 Quiz ID: q2

What is the hidden terminal problem in wireless networks?

A challenge where nodes cannot detect each other's transmissions

Difficulty in finding the physical location of wireless devices

Signal interference from external sources

Loss of connection during device handoff

Question 3 of 60 Quiz ID: q3

Which challenge is NOT typically associated with wireless networks compared to wired networks?

Path loss and fading

Multipath propagation

Fixed addressing schemes

Handoff procedures

Question 4 of 60 Quiz ID: q4

What is the primary advantage of spread spectrum encoding?

Higher data transmission rates

Less susceptibility to signal jamming

Reduced power consumption

Simpler hardware implementation

Question 5 of 60 Quiz ID: q5

In Frequency Hopping Spread Spectrum (FHSS), what happens to the carrier frequency?

It remains constant throughout transmission

It changes according to a predetermined sequence

It is divided into multiple parallel channels

It is eliminated to reduce interference

Question 6 of 60 Quiz ID: q6

In Direct Sequence Spread Spectrum (DSSS), each data bit is represented by:

A single bit in the transmitted signal

Multiple bits using a spreading code

A frequency-hopped sequence

An analog waveform

Question 7 of 60 Quiz ID: q7

What type of sequence is used as a spreading code in DSSS?

Sequential binary pattern

Pseudorandom sequence of '1' and '0's

Alphabetical character sequence

Fixed alternating pattern

Question 8 of 60 Quiz ID: q8

In DSSS, how is the data stream combined with the spreading code at the sender?

Using AND operation

Using OR operation

Using XOR operation

Using multiplication

Question 9 of 60 Quiz ID: q9

Code Division Multiple Access (CDMA) is:

A modulation technique for single users

A multiplexing technique used with spread spectrum

A frequency allocation method

A power control mechanism

Question 10 of 60 Quiz ID: q10

In CDMA, what must be true about the chipping codes used by different users?

They must be identical

They must be sequential

They must be orthogonal

They must be of equal length

Question 11 of 60 Quiz ID: q11

In CDMA, how is a data bit '1' represented using the chipping code?

By the complement of the chipping code

By the chipping code as it is

By doubling the chipping code

By inverting the chipping code

Question 12 of 60 Quiz ID: q12

Which IEEE standard family governs wireless LAN specifications?

IEEE 802.3

IEEE 802.5

IEEE 802.11

IEEE 802.15

Question 13 of 60 Quiz ID: q13

What does BSS stand for in 802.11 terminology?

Basic System Set

Basic Service Set

Base Station System

Binary Service Standard

Question 14 of 60 Quiz ID: q14

A Basic Service Set (BSS) consists of:

Multiple access points connected together

A set of stations executing the same MAC protocol

Different wireless standards operating together

Base stations from different manufacturers

Question 15 of 60 Quiz ID: q15

What is the purpose of a Distribution System (DS) in 802.11?

To distribute power to wireless devices

To interconnect BSS and LANs to create an ESS

To manage frequency distribution

To control data packet distribution

Question 16 of 60 Quiz ID: q16

An Independent BSS (IBSS) is characterized by:

Connection to multiple access points

No access to a distribution system

Higher data transmission rates

Centralized control mechanism

Question 17 of 60 Quiz ID: q17

In infrastructure mode, what role do base stations play?

They only relay data packets

They provide services like addressing and routing

They store data permanently

They generate wireless signals

Question 18 of 60 Quiz ID: q18

Ad hoc networks are characterized by:

Centralized control through base stations

Nodes providing services themselves without infrastructure

Higher security compared to infrastructure networks

Fixed topology that cannot change

Question 19 of 60 Quiz ID: q19

What is handoff in wireless networks?

Transferring data between applications

Changing attachment point from one base station to another

Switching between different wireless standards

Passing control from user to network

Question 20 of 60 Quiz ID: q20

What does DFWMAC stand for in 802.11?

Distributed Foundation Wireless MAC

Dynamic Frequency Wireless Multiple Access Control

Digital Foundation Wireless Media Access

Direct Function Wireless MAC

Question 21 of 60 Quiz ID: q21

Which function provides distributed access control in 802.11 DFWMAC?

Point Coordination Function (PCF)

Distributed Coordination Function (DCF)

Medium Access Control (MAC)

Collision Detection Function (CDF)

Question 22 of 60 Quiz ID: q22

CSMA/CA is an example of which 802.11 function?

Point Coordination Function (PCF)

Distributed Coordination Function (DCF)

Centralized Control Function

Collision Detection Function

Question 23 of 60 Quiz ID: q23

What frequency band does 802.11a operate in?

2.4 GHz

5 GHz

900 MHz

Both 2.4 GHz and 5 GHz

Question 24 of 60 Quiz ID: q24

Which modulation technique does 802.11a use?

DSSS

FHSS

OFDM

QAM

Question 25 of 60 Quiz ID: q25

What is the maximum data rate supported by 802.11a?

11 Mbps

54 Mbps

100 Mbps

150 Mbps

Question 26 of 60 Quiz ID: q26

Which frequency band and modulation does 802.11b use?

5 GHz OFDM

2.4 GHz DSSS

900 MHz FHSS

2.4 GHz OFDM

Question 27 of 60 Quiz ID: q27

What are the data rates supported by 802.11b?

1 and 2 Mbps

5.5 and 11 Mbps

6 and 54 Mbps

1, 2, 5.5, and 11 Mbps

Question 28 of 60 Quiz ID: q28

How does 802.11g extend 802.11b?

By changing to 5 GHz frequency

By extending to data rates greater than 20 Mbps

By using FHSS modulation

By reducing power consumption

Question 29 of 60 Quiz ID: q29

What technology does 802.11n introduce to achieve higher throughput?

FHSS

MIMO

CDMA

TDMA

Question 30 of 60 Quiz ID: q30

Which frequency bands does 802.11n support?

Only 2.4 GHz

Only 5 GHz

Both 2.4 GHz and 5 GHz

900 MHz and 2.4 GHz

Question 31 of 60 Quiz ID: q31

What is the maximum payload size in an 802.11 frame?

1500 bytes

2312 bytes

4096 bytes

1024 bytes

Question 32 of 60 Quiz ID: q32

How many address fields are there in an 802.11 frame?

Question 33 of 60 Quiz ID: q33

What does Address 1 represent in an 802.11 frame?

MAC address of the transmitting station

MAC address of the receiving station

MAC address of the router interface

MAC address of the access point

Question 34 of 60 Quiz ID: q34

Address 4 in 802.11 frames is used for:

Infrastructure mode only

Ad-hoc mode operation

Both infrastructure and ad-hoc modes

Router identification only

Question 35 of 60 Quiz ID: q35

Which generation of mobile telecommunications first introduced digital voice?

Question 36 of 60 Quiz ID: q36

What was the primary service offered by 1G mobile systems?

Digital voice

Analog voice

Data services

Internet access

Question 37 of 60 Quiz ID: q37

Which generation introduced higher capacity packetized data services?

2.5G

Question 38 of 60 Quiz ID: q38

What is the data rate capability of 3G systems?

384 kbps

2 Mbps

200 Mbps

20 Gbps

Question 39 of 60 Quiz ID: q39

4G mobile systems are characterized by being:

Partially IP based

Circuit switched only

Completely IP based

Analog based

Question 40 of 60 Quiz ID: q40

What is the theoretical maximum data rate for 5G systems?

200 Mbps

2 Gbps

20 Gbps

200 Gbps

Question 41 of 60 Quiz ID: q41

Which multiplexing technique is used in 1G systems?

TDMA

CDMA

FDMA

OFDMA

Question 42 of 60 Quiz ID: q42

Both 4G and 5G systems use which multiplexing technique?

FDMA

TDMA

CDMA

OFDMA

Question 43 of 60 Quiz ID: q43

The core network for 1G and 2G systems was based on:

IP backbone

PSTN

Internet protocols

Packet networks only

Question 44 of 60 Quiz ID: q44

What are the two main components of a basic mobile communications system?

Transmitter and receiver

Base station and mobile station

Antenna and amplifier

Controller and switch

Question 45 of 60 Quiz ID: q45

In mobile communications, what is the forward link also called?

Uplink

Downlink

Sidelink

Backlink

Question 46 of 60 Quiz ID: q46

For full-duplex communication in mobile systems, what is required?

A single RF channel

A pair of RF channels

Three RF channels

Multiple antennas only

Question 47 of 60 Quiz ID: q47

Which type of mobile communication system is designed for sparsely populated areas?

Cordless telephone systems

Cellular systems

Mobile satellite systems

WiFi networks

Question 48 of 60 Quiz ID: q48

The most widespread mobile communication technique is:

Cordless systems

Cellular systems

Satellite systems

Microwave systems

Question 49 of 60 Quiz ID: q49

What is the cellular concept primarily based on?

High-power transmitters and large coverage zones

Low-power transmitters and small coverage zones

Medium-power transmitters and variable zones

Ultra-high power transmitters and nationwide coverage

Question 50 of 60 Quiz ID: q50

Frequency reuse in cellular systems allows:

Using the same frequencies in all cells

Using the same frequencies in non-adjacent cells

Avoiding frequency interference completely

Increasing power in all cells

Question 51 of 60 Quiz ID: q51

Cell splitting in cellular systems is used to:

Reduce interference

Increase capacity in high traffic areas

Simplify network management

Reduce power consumption

Question 52 of 60 Quiz ID: q52

What is the primary function of the MTSO in cellular systems?

Signal amplification

Frequency allocation

All call control functions

Power management

Question 53 of 60 Quiz ID: q53

Voice channels in cellular systems are also known as:

Control channels

Traffic channels

Paging channels

Access channels

Question 54 of 60 Quiz ID: q54

What does FOCC stand for in cellular channel structure?

Forward Operations Control Channel

Forward Control Channel

Frequency Operations Control Channel

Full Operations Control Channel

Question 55 of 60 Quiz ID: q55

In FDMA cellular systems like AMPS, what is the typical channel bandwidth?

25 kHz

30 kHz

200 kHz

1.25 MHz

Question 56 of 60 Quiz ID: q56

GSM is an example of which multiple access technique?

FDMA

TDMA

CDMA

OFDMA

Question 57 of 60 Quiz ID: q57

In GSM's TDMA system, how many time slots are typically used per frame?

Question 58 of 60 Quiz ID: q58

IS-95 is an example of which cellular system generation and access method?

1G FDMA

2G TDMA

2G CDMA

3G WCDMA

Question 59 of 60 Quiz ID: q59

During mobile initialization, what does the mobile unit do first?

Transmits its identity

Selects the strongest control channel

Requests a voice channel

Performs authentication

Question 60 of 60 Quiz ID: q60

Why is power control important in cellular systems?

To increase data transmission rates

To save battery power and reduce interference

To improve call quality only

To simplify network management

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