Mobile Wireless Networks: A Comprehensive Guide for Beginners

Question 1

Examine the economic and business models of mobile wireless networks. Discuss how competition, regulation, and technological advancements influence the industry's landscape.

Accepted Answer

Competition, regulation, and technological advancements are crucial factors shaping the economic and business models of mobile wireless networks.

Answer

Mobile wireless networks operate in a purely competitive market, with many small players competing solely on price.

Answer

Government regulations have no effect on the economic and business models of mobile wireless networks.

Answer

Technological advancements have a negligible impact on the economic and business models of mobile wireless networks.

Question 2

Which multiple access technique is employed in GSM networks?

Accepted Answer

Time Division Multiple Access (TDMA)

Answer

Frequency Division Multiple Access (FDMA)

Answer

Code Division Multiple Access (CDMA)

Answer

Orthogonal Frequency Division Multiple Access (OFDMA)

Question 3

Which of the following is **not** a central component of a mobile wireless network architecture?

Accepted Answer

Router

Answer

Base Transceiver Station (BTS)

Answer

Mobile Switching Center (MSC)

Answer

Home Location Register (HLR)

Question 4

The primary function of a Base Transceiver Station (BTS) in a mobile network is to:

Accepted Answer

Relay signals between wireless devices and the core network

Answer

Connect wireless devices to the network

Answer

Provide power to wireless devices

Answer

Manage network traffic

Question 5

The key difference between GSM and CDMA mobile networks lies in their:

Accepted Answer

Multiple access techniques

Answer

Frequency assignment methods

Answer

Modulation schemes

Answer

Network topologies

Question 6

The Home Location Register (HLR) in a mobile network is primarily responsible for:

Accepted Answer

Storing subscriber information

Answer

Tracking subscriber location

Answer

Providing routing information

Answer

Managing network security

Question 7

The main purpose of a radio resource management system in a mobile network is to:

Accepted Answer

Manage network resources for efficient utilization

Answer

Configure network parameters

Answer

Monitor network performance

Answer

Detect and resolve network issues

Question 8

How do handover mechanisms affect the performance, reliability, and user experience of mobile wireless networks?

Accepted Answer

Handover mechanisms have a significant impact on performance, reliability, and user experience.

Answer

Handover mechanisms have a negligible impact on network performance, reliability, and user experience.

Answer

All handover mechanisms provide the same level of performance, reliability, and user experience.

Question 9

In the context of the Internet of Things (IoT), discuss the significance of mobile wireless networks. Analyze the challenges and opportunities that arise from connecting numerous devices and sensors.

Accepted Answer

Mobile wireless networks enable IoT connectivity, empowering the IoT ecosystem.

Accepted Answer

IoT connectivity challenges include security risks and data management complexities.

Answer

Mobile wireless networks are not suitable for IoT due to bandwidth and coverage limitations.

Answer

IoT benefits outweigh any potential challenges or drawbacks.

Question 10

Describe the significance of interference management in mobile wireless networks and explain the fundamental algorithms employed to minimize its impact.

Accepted Answer

Interference management is achieved through algorithms that optimize resource allocation and transmission power to minimize interference.

Answer

Interference management is not necessary for mobile wireless networks, as signals do not overlap.

Answer

Interference management primarily involves employing directional antennas to focus signals towards intended receivers.

Question 11

Which network topology is commonly used in mobile wireless networks due to its flexibility and scalability?

Accepted Answer

Mesh topology

Answer

Star topology

Answer

Bus topology

Answer

Ring topology

Question 12

Which protocol is responsible for finding and maintaining routes for data transmission in mobile wireless networks?

Accepted Answer

OLSR

Answer

HTTP

Answer

TCP

Answer

IP

Question 13

Which metric is commonly used to measure the responsiveness of a mobile wireless network?

Accepted Answer

Delay

Answer

Throughput

Answer

Packet loss

Answer

Availability

Question 14

What is the primary function of a base station in a mobile wireless network?

Accepted Answer

To facilitate communication between mobile devices and the network

Answer

To provide power to mobile devices

Answer

To perform advanced data processing tasks

Answer

To manage the network resources

Question 15

What is the significance of handover in mobile wireless networks?

Accepted Answer

To maintain uninterrupted connectivity as mobile devices move between different coverage areas

Answer

To improve network performance

Answer

To increase security

Answer

To reduce power consumption

Question 16

Which technique is commonly employed to enhance the security of mobile wireless networks by encrypting data transmissions?

Accepted Answer

Encryption

Answer

Firewall

Answer

Intrusion detection system

Answer

Virtual private networks (VPNs)

Question 17

What is a key benefit of employing a cellular network architecture in mobile wireless networks?

Accepted Answer

Enhanced coverage and increased capacity

Answer

Reduced signal interference

Answer

Improved latency

Answer

Lower cost of implementation

Question 18

Explain the primary function of the MAC protocol in a mobile wireless network.

Accepted Answer

Control data transmission over the wireless medium.

Answer

Establish a connection between the mobile device and the network.

Answer

Manage IP addresses and routing.

Answer

Provide security and encryption.

Question 19

Mobile wireless networks are characterized by their:

Accepted Answer

Mobility

Answer

High latency

Answer

Low bandwidth

Answer

Immobility

Question 20

What is the primary advantage of using a hierarchical network architecture in a mobile wireless network?

Accepted Answer

Improved Scalability

Answer

Reduced Latency

Answer

Enhanced Security

Answer

Increased Bandwidth

Question 21

How do mobile wireless networks contribute to the economic growth and development of developing economies?

Accepted Answer

Increased productivity and efficiency in various sectors

Accepted Answer

Creation of new industries and job opportunities

Accepted Answer

Improved communication and access to essential services

Question 22

How has the evolution of mobile wireless networks from 2G to 5G affected bandwidth and latency?

Accepted Answer

Increased bandwidth and reduced latency

Answer

Increased cost and reduced coverage

Answer

Reduced bandwidth and increased latency

Question 23

In industrial settings, what are the main advantages, obstacles, and factors to consider when deploying and managing private mobile wireless networks?

Accepted Answer

Advantages: enhanced security, reliability, and control

Accepted Answer

Obstacles: high initial investment and ongoing maintenance costs

Accepted Answer

Considerations: spectrum availability and adherence to regulations

Answer

Advantages: reduced costs and greater flexibility

Question 24

Which of these is NOT a major research area in mobile wireless networks?

Accepted Answer

Robotics

Answer

Network Virtualization

Answer

Edge Computing

Answer

Machine Learning

Question 25

Which approach is not aligned with sustainable practices for mobile wireless networks?

Accepted Answer

Utilization of non-renewable energy sources

Answer

Energy-efficient network design

Answer

Responsible disposal of electronic waste

Answer

Integration of renewable energy sources

Question 26

Which of the following is the primary function of the Medium Access Control (MAC) layer in mobile wireless networks?

Accepted Answer

Controls network access, ensuring fair resource utilization, and prevents collisions

Answer

Handles data transmission and reception between devices

Answer

Provides routing and forwarding services

Answer

Manages device configuration and security

Question 27

What is the purpose of the Global Positioning System (GPS) in mobile wireless networks?

Accepted Answer

Provides precise location information for mobile devices

Answer

Enables network synchronization and timekeeping

Answer

Facilitates data transmission over long distances

Answer

Supports user authentication and authorization

Question 28

Which primary advantage is offered by utilizing a cellular network for mobile devices?

Accepted Answer

Extensive coverage area

Answer

High-speed bandwidth

Answer

Low latency

Question 29

In mobile wireless networks, which network architecture type is commonly employed to connect mobile devices to the core network?

Accepted Answer

Base station and radio access network

Answer

Peer-to-peer

Answer

Client-server

Answer

Ring topology

Question 30

Within mobile wireless networks, which protocol is responsible for managing data transfer between a mobile device and the network?

Accepted Answer

MAC (Media Access Control)

Answer

IP (Internet Protocol)

Answer

TCP (Transmission Control Protocol)

Answer

DNS (Domain Name System)

Question 31

In mobile wireless networks, what is the primary role of a mobility management protocol?

Accepted Answer

To maintain connectivity and manage handovers as devices move

Answer

To optimize network resource allocation

Answer

To ensure secure data transmission

Question 32

Identify the primary distinction between GSM and CDMA, two widely used mobile wireless standards:

Accepted Answer

GSM employs time-division multiplexing, while CDMA utilizes code-division multiplexing

Answer

GSM offers higher bandwidth than CDMA

Answer

CDMA offers more extensive coverage than GSM

Answer

GSM is a 4G technology, whereas CDMA is a 3G technology

Question 33

What is the purpose of a femtocell within a mobile wireless network?

Accepted Answer

To extend coverage and enhance capacity in limited areas

Answer

To facilitate network traffic management

Answer

To provide security measures

Answer

To connect devices to the internet

Question 34

In mobile wireless networks, what is the major advantage of utilizing OFDMA (Orthogonal Frequency-Division Multiple Access)?

Accepted Answer

Improved spectral efficiency and reduced interference

Answer

Increased bandwidth

Answer

Enhanced security

Answer

Reduced latency

Question 35

Which protocol is used by devices in a Wireless Local Area Network (WLAN) to discover available networks and establish connections?

Accepted Answer

802.11 Beacon

Answer

RIPv2

Answer

IPv4 DHCP

Answer

TCP

Question 36

Which type of mobile wireless network is designed for high mobility and supports wide-area coverage?

Accepted Answer

Cellular Network

Answer

PAN

Answer

MAN

Answer

WLAN

Question 37

In a Long-Term Evolution (LTE) network, what is the primary function of a Mobility Management Entity (MME)?

Accepted Answer

To manage the mobility of User Equipment (UE) as they move between different base stations.

Answer

To encrypt and decrypt data traffic.

Answer

To provide Quality of Service (QoS) guarantees to users.

Question 38

Which advantage is associated with the use of Orthogonal Frequency Division Multiplexing (OFDM) in LTE networks?

Accepted Answer

Higher data rates and improved resistance to multipath fading.

Answer

Lower power consumption

Answer

Reduced latency

Question 39

What is the primary function of a Packet Data Network Gateway (PDN-GW) in a mobile wireless network?

Accepted Answer

To provide a gateway to external networks like the Internet.

Answer

To manage user authentication and authorization.

Answer

To assign IP addresses to mobile devices.

Question 40

Which technology is utilized to enhance the coverage and capacity of cellular networks by deploying smaller base stations?

Accepted Answer

Small Cells

Answer

Satellite

Answer

Wi-Fi

Answer

MESH

Question 41

In a mobile wireless network, what is the purpose of a handover procedure?

Accepted Answer

To seamlessly transfer an ongoing call or data session from one base station to another during device movement.

Answer

To assign IP addresses to devices

Answer

To authenticate new users

Question 42

Which component is NOT part of a mobile wireless network architecture?

Accepted Answer

Firewall

Answer

Mobile device

Answer

Core network

Answer

Base station

Question 43

Identify the modulation technique employed in GSM networks:

Accepted Answer

Gaussian Minimum Shift Keying (GMSK)

Answer

Orthogonal Frequency-Division Multiplexing (OFDM)

Answer

Quadrature Phase-Shift Keying (QPSK)

Answer

Code-Division Multiple Access (CDMA)

Question 44

Describe the primary responsibility of the MAC layer within a mobile wireless network:

Accepted Answer

Manage access to the shared wireless medium

Answer

Control power and frequency of device transmissions

Answer

Handle authentication and encryption processes

Answer

Provide routing services between devices

Question 45

Which attribute is a defining characteristic of LTE networks?

Accepted Answer

Employs Orthogonal Frequency-Division Multiple Access (OFDMA)

Answer

Implements a Time-Division Multiple Access (TDMA) scheme

Answer

Utilizes Code-Division Multiple Access (CDMA) technology

Question 46

What is the purpose of a handover in the context of mobile wireless networks?

Accepted Answer

Enable seamless transfer of a mobile device between base stations during movement

Answer

Initiate a call between two mobile devices

Answer

Establish a connection to the core network

Question 47

In a GSM network, what is the primary function of a mobile switching center (MSC)?

Accepted Answer

Controls the establishment, routing, and termination of calls

Answer

Provides a gateway to external networks

Answer

Manages radio resource allocation

Question 48

When evaluating the performance of mobile wireless networks, which metric is primarily used as an indicator of overall network efficiency?

Accepted Answer

Throughput

Answer

Signal strength

Answer

Latency

Answer

Packet loss rate

Question 49

Which trend is shaping the evolution of modern mobile wireless networks?

Accepted Answer

Adoption of network virtualization and software-defined networking (SDN) principles

Answer

Increased deployment of mesh topologies

Answer

Shift towards using frequency bands below 1 GHz

Question 50

Which of the following is NOT a fundamental component of a mobile wireless network?

Accepted Answer

Web Server

Answer

Base station

Answer

Core network

Answer

Mobile device

Question 51

Which protocol is primarily used for IP-based communication in mobile wireless networks?

Accepted Answer

TCP/IP

Answer

HTTP

Answer

IPsec

Answer

UDP

Question 52

Which of these is NOT a key component of a typical mobile wireless network?

Accepted Answer

Subnet mask

Answer

Mobile device

Answer

Core network

Answer

Base station

Question 53

What is the primary purpose of a MAC address in mobile wireless networks?

Accepted Answer

Device identification

Answer

Encryption

Answer

Error correction

Answer

Data routing

Question 54

What is a femtocell in the context of mobile wireless networks?

Accepted Answer

A small, low-power base station

Answer

A mobile device

Answer

A high-power antenna

Answer

A network gateway

Question 55

Which organization is responsible for developing and maintaining the GSM standard?

Accepted Answer

3GPP

Answer

IEEE

Answer

ITU

Answer

Wi-Fi Alliance

Question 56

What is the key distinguishing feature between 4G and 5G mobile wireless networks?

Accepted Answer

Speed and latency

Answer

Network architecture

Answer

Frequency range

Question 57

Which of the following is NOT a typical component of a mobile wireless network?

Accepted Answer

Email server

Answer

Base station

Answer

Core network

Answer

Mobile device

Question 58

What is the primary function of a base station in a mobile wireless network?

Accepted Answer

To provide coverage and connectivity to mobile devices within its cell.

Answer

To authenticate and authorize user access to the network.

Answer

To manage network traffic across the entire network.

Question 59

Which protocol is predominantly used for data routing within the core network of a mobile wireless network?

Accepted Answer

Internet Protocol (IP)

Answer

Transmission Control Protocol (TCP)

Answer

User Datagram Protocol (UDP)

Answer

Spanning Tree Protocol (STP)

Question 60

What is the main purpose of handover in a mobile wireless network?

Accepted Answer

To seamlessly transfer a mobile device from one base station to another as it moves, maintaining connectivity.

Answer

To increase the overall capacity of the network by distributing traffic.

Answer

To improve signal strength and quality for a mobile device.

Question 61

What is the key difference between a circuit-switched and a packet-switched network?

Accepted Answer

Circuit-switched networks establish a dedicated path for communication, while packet-switched networks break data into packets and route them independently.

Answer

Circuit-switched networks are generally more reliable, while packet-switched networks offer better efficiency.

Question 62

What is a significant advantage of using OFDMA in mobile wireless networks?

Accepted Answer

Increased flexibility and ability to serve multiple users simultaneously.

Answer

Enhanced security features for data transmission.

Answer

Reduced latency for data delivery.

Question 63

Which of the following is **NOT** a characteristic of a cellular network?

Accepted Answer

Centralized control

Answer

Frequency reuse

Answer

Handoff capability

Answer

Use of multiple base stations

Question 64

In a GSM network, what is the primary function of the Mobile Switching Center (MSC)?

Accepted Answer

Managing call setup and handoff between cells

Answer

Providing authentication and authorization for users

Answer

Transmitting data between the mobile device and the internet

Answer

Managing the allocation of radio frequencies