Chapter 10

Questions and Answers

What is the ratio of mobile phone subscribers to fixed phone subscribers as of 2019?

2-to-1

5-to-1

10-to-1 (correct)

1-to-10

Which technology is associated with higher transmission rates among wireless links as listed?

5G (correct)

4G LTE

Bluetooth

802.11b

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

To connect mobile devices to the wired network (correct)

To measure signal strength

To provide a backup power source

To transmit data without a wired connection

In which network topology does a base station play a critical role?

Infrastructure Mode Signup and view all the answers

What is a significant challenge in wireless and mobile networks?

Communication over the wireless link Signup and view all the answers

How do wireless hosts connect to the Internet?

Via base stations Signup and view all the answers

Which of the following wireless technologies has the lowest maximum transmission rate?

802.11b Signup and view all the answers

What occurs when a mobile user switches from one base station to another?

Handoff Signup and view all the answers

What does the abbreviation 'SDN' stand for in relation to wireless networks?

Software-Defined Networking Signup and view all the answers

Which wireless protocol supports up to 14 Gbps connection speeds?

802.11ax Signup and view all the answers

Study Notes

Introduction to Wireless and Mobile Networks

Mobile phone subscribers outnumber fixed phone subscribers by a ratio of 10-to-1 as of 2019.
There were five times more mobile-broadband-connected devices compared to fixed-broadband-connected devices in 2019.
4G and 5G cellular networks utilize the Internet Protocol stack and support Software-Defined Networking (SDN).
Key challenges in wireless and mobile networks include communication via wireless links and managing users' mobility as they switch network connections.

Chapter 7 Outline

Covers various aspects of wireless and mobile networks, including characteristics of wireless links, WiFi standards, and cellular network developments.
Explores mobility management principles and practices within 4G and 5G technologies.
Discusses Mobile IP and the implications of mobility on higher-layer protocols.

Elements of a Wireless Network

Comprises a wired network infrastructure integrated with wireless hosts such as laptops, smartphones, and IoT devices, which can be stationary or mobile.
Includes a base station that connects to the wired network and facilitates communication between wireless hosts and the network.
Base stations can be cell towers or 802.11 access points providing network access.
Wireless links connect mobile devices to base stations and may also serve as backbone connections, utilizing various access protocols.

Wireless Network Topologies

Infrastructure Mode:
- Involves a base station that connects mobile devices to the wired network; handoffs manage user movement between base stations.
Ad Hoc Mode:
- Operates without a base station, allowing nodes to communicate directly with one another and form networks autonomously.

Wireless Network Taxonomy

Single Hop:
- Connection from a host to a base station (WiFi or cellular), which then links to the Internet.
Multiple Hops:
- Involves relaying connections through multiple wireless nodes, creating a mesh network to access the Internet.
No Base Station, No Connection to Larger Internet:
- Characteristic of Bluetooth and ad hoc networks, often used for localized communication without broader Internet access.

Description

Explore the fundamental concepts of wireless and mobile networks, including the rise of mobile phone subscribers compared to fixed connections. Understand the implications of 4G and 5G technologies and the challenges faced in communication and mobility. This quiz covers the essentials of network protocols and user mobility in modern telecommunications.