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Questions and Answers
Which of the following represents user mobility?
What limitation is imposed by mobility?
What does wireless communication involve?
Transmission of information over a distance without wires or cables.
What is a characteristic of a signal?
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Wireless communication can be used for __________.
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Which of the following is NOT an example of wireless communication applications?
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What are the limitations of mobile computing related to the mobile computer?
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Network mobility allows the user to move from one bearer to another.
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Study Notes
###Â Mobility Attributes
- User Mobility: Users can access the same service from different physical locations (e.g., London to New York).
- Network Mobility: Users can access the same service from different networks (e.g., Hong Kong to Singapore).
- Bearer Mobility: Users can switch between different communication methods (e.g., from WAP to voice or SMS) to access the same service.
- Device Mobility: Users can access the same service from different devices (e.g., from a PC to a mobile phone).
- Session Mobility: Users can move unfinished sessions from one device to another (e.g., from a mobile device to a desktop computer), maintaining the session's data.
- Service Mobility: Users can move between different services (e.g., switch from email to another application) seamlessly.
- Host Mobility: Users can move a device that is acting as a host for a network (e.g., a laptop for grid computing) while maintaining its host function.
###Â Limitations of Mobile Computing
- Wireless Network Limitations:
- Network fragmentation and heterogeneity can create issues for seamless connectivity.
- Frequent disconnections due to signal issues are common.
- Limited bandwidth can impact data transfer speeds.
- Mobility Limitations:
- Lack of system/application awareness of mobility can lead to disruptions.
- Route interruptions due to user movement are a potential problem.
- Mobile Computer Limitations:
- Short battery life is a significant concern.
- Limited processing power, memory capacity, and other resources can hinder performance.
###Â Introduction to Wireless Communication
- Wireless communication involves transmitting information over a distance without physical cables or wires.
- It encompasses various technologies and devices for connecting and communicating wirelessly.
- Applications of wireless communication include GPS, wireless keyboard-mouse sets, headsets, radio receivers, satellite and broadcast television, cordless phones, and more.
###Â Signals - Basics
- A signal is an electrical or electromagnetic current that carries data between devices or networks.
- Signals are essential for communication, computing, networking, and electronic devices.
- Signals can be either analog or digital.
- Electromagnetic signals, specifically, are used for transmitting information wirelessly.
- They are functions of time and can be represented as functions of frequency.
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Description
This quiz explores various mobility attributes in mobile communication, including user, network, bearer, and device mobility. Understand how users can seamlessly transition between different networks, devices, and services while maintaining session integrity. Test your knowledge on these essential concepts in mobile technology.
