CAPE MOB Unit 1 flashcards
CAPE MOB Unit 1 · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Mobile computing
- A computing environment in which users can access services and applications while moving, using portable devices and wireless networks, despite constraints such as limited battery, bandwidth, and intermittent connectivity.
- Three-tier mobile architecture
- A layered model consisting of the presentation tier (client device), application tier (middleware or server), and data tier (database), enabling separation of user interface, logic, and storage.
- User mobility
- A mobility type where the person moves with the device across different locations or networks, requiring services to adapt to changing context and connectivity.
- Device mobility
- A mobility type where the device itself moves between networks or access points, potentially changing its point of attachment while maintaining communication.
- Session mobility
- A mobility type where an active session persists and is transferred across different devices or network connections, allowing continuity of user interaction.
- Context awareness
- The ability of a mobile system to sense and adapt to its environment using sensors such as GPS, accelerometer, light, and proximity, tailoring services to location, time, and activity.
- Battery constraint
- A fundamental limitation of mobile devices where energy storage is finite, requiring efficient hardware and software design to extend operational time between charges.
- Intermittent connectivity
- A condition in mobile computing where network access is not continuous, requiring applications to support offline operation, caching, and synchronization.
- Heterogeneity
- The diversity of mobile devices, operating systems, and networks, which challenges developers to create interoperable and adaptable applications.
- Seamless handoff
- The ability to transfer an active connection between networks or access points without noticeable interruption to the user, preserving session continuity.
- Radio waves
- A wireless communication medium using electromagnetic waves in the radio frequency spectrum, offering long range and non-line-of-sight operation, commonly used in Wi-Fi, cellular, and Bluetooth.
- Infrared communication
- A wireless medium using infrared light for short-range, line-of-sight communication, limited by obstacles and requiring direct alignment between transmitter and receiver.
- Wearable device
- A mobile device worn on the body, such as a smartwatch or fitness tracker, often used for health monitoring and context sensing with limited screen and processing resources.
- Embedded sensor
- A small device integrated into the environment or objects to collect data (e.g., temperature, motion) and often connected wirelessly as part of IoT systems.
- Mobile middleware
- Software that sits between the mobile application and the network or operating system, providing services such as adaptation, security, and data synchronization.
- Privacy in mobile computing
- The protection of user data collected by mobile devices and sensors, requiring consent, anonymization, and secure storage to prevent unauthorized access or misuse.
- 1G cellular
- The first generation of cellular networks, using analog technology for voice calls only, with no support for data services or SMS.
- 2G cellular
- The second generation of cellular networks, introducing digital voice, SMS, and limited data services such as GPRS and EDGE.
- 3G cellular
- The third generation of cellular networks, designed for mobile data with higher speeds, enabling video calls and mobile internet access.
- 4G LTE
- The fourth generation of cellular networks, an all-IP broadband system providing high-speed data, low latency, and support for multimedia services.
- 5G
- The fifth generation of cellular networks, offering enhanced mobile broadband, ultra-reliable low-latency communication, and massive machine-type communication for IoT.
- CSMA/CA
- Carrier Sense Multiple Access with Collision Avoidance, the medium access method used in IEEE 802.11 Wi-Fi, where stations sense the channel and use acknowledgments to detect collisions.
- IEEE 802.11
- The family of standards for wireless local area networks (Wi-Fi), defining physical and MAC layer specifications for wireless connectivity.
- Bluetooth piconet
- A small wireless network formed by Bluetooth devices, consisting of one master and up to seven active slaves communicating in a frequency-hopping scheme.
- Mobile IP
- A protocol that allows a mobile node to maintain its home IP address while moving across networks, using home agent, foreign agent, care-of address, and tunneling.
- Care-of address
- A temporary IP address assigned to a mobile node when visiting a foreign network, used by the home agent to forward packets to the mobile node's current location.
- Hard handoff
- A handoff method where the connection to the current base station is broken before establishing a connection to the new one, often causing a brief interruption.
- Soft handoff
- A handoff method where the connection to the new base station is established before breaking the old one, minimizing interruption and improving reliability.
- WPA2
- A Wi-Fi security protocol using AES-CCMP encryption for stronger protection than WEP, widely deployed in wireless networks.
- WPA3
- The latest Wi-Fi security protocol, introducing SAE for robust authentication and providing forward secrecy, replacing WPA2 in modern networks.
- MANET
- Mobile Ad Hoc Network, an infrastructure-less, self-configuring wireless network where nodes act as routers, using protocols such as AODV and OLSR for routing.
- Snoop TCP
- A TCP enhancement for wireless networks where a proxy at the base station caches and retransmits lost packets locally, preventing TCP from misinterpreting wireless loss as congestion.