Netw4009 Lecture 2 Exam

A Personal Area Network (PAN) refers to a network that connects devices within a short range, typically within a person's immediate surroundings. Bluetooth is a wireless technology that enables communication and connectivity between devices in close proximity, making it an example of a PAN. Therefore, Bluetooth is the correct answer as it aligns with the definition and characteristics of a Personal Area Network.

Wi-Max IEEE 802.16 is a radio system technique that provides high-speed data rates and medium-range distances, making it suitable for various broadband applications. The typical bitrates of Wi-Max range from 10 to 100 Mbps. This means that the data transmission speed can vary within this range, depending on the specific conditions and requirements of the network.

IEEE 802.16e and 802.20 are wireless standards for Mobile WiMAX and Wireless Broadband. Mobile WiMAX refers to a wireless communication standard that allows for high-speed internet access on mobile devices, such as smartphones and tablets. Wireless Broadband, on the other hand, refers to a wireless internet connection that provides high-speed data transmission over a wide area. Therefore, these standards are specifically designed to support mobile connectivity and provide fast and reliable internet access on the go.

WiMax stands for Worldwide Interoperability for Microwave Access, which is a wireless communications technology that provides high-speed internet access over long distances. It is considered the cheapest option among the given choices because it offers a cost-effective solution for providing broadband connectivity in areas where wired infrastructure is limited or expensive to deploy. WiMax operates on licensed or unlicensed frequencies, allowing for flexible deployment options and reducing the overall cost of implementation. Additionally, WiMax offers better coverage and higher data rates compared to 3G and Mobile-Fi, making it a more affordable choice for wireless communication.

WiMAX networks offer better speed and price compared to 3G mobile networks. This means that WiMAX networks provide faster data transfer rates and are more cost-effective for users. With faster speeds, users can enjoy quicker downloads, smoother streaming, and better overall internet performance. Additionally, the affordability of WiMAX networks makes them a more attractive option for users who are looking for high-speed connectivity without breaking the bank.

IEEE 802.20 is a wireless standard that specifically focuses on wireless broadband networks. It is designed to provide high-speed data transmission over a wide area, making it suitable for applications such as mobile internet access and multimedia streaming. This standard defines the protocols and specifications necessary for the implementation of wireless broadband networks, ensuring interoperability and compatibility between different devices and networks.

Ubiquitous networking encompasses various research areas and applications such as distributed computing, mobile computing, sensor networks, and human-computer interaction. Artificial intelligence can be considered as another important aspect within this field. It involves the development of intelligent systems that can mimic human intelligence and perform tasks such as problem-solving, decision-making, and learning. Incorporating artificial intelligence into ubiquitous networking can enhance the efficiency and effectiveness of the network, enabling intelligent decision-making and adaptive behaviors.

802.16 IEEE is a wireless standard that is commonly known as Wireless Interoperability Microwave Access (WiMAX). This standard is specifically designed for wireless broadband networks, allowing for high-speed internet access over long distances. WiMAX technology enables the delivery of broadband services to both fixed and mobile users, making it a suitable solution for areas with limited wired infrastructure. Unlike WiFi, which is commonly used for short-range wireless connections, WiMAX provides a wider coverage area and higher data transfer rates, making it ideal for applications such as internet access, voice over IP, and multimedia streaming.

The primary radio configuration settings that significantly impact signal coverage (range) in an Access Point are the transmit power and antenna type. The transmit power determines how strong the signal is and can affect the distance it can reach. The antenna type also plays a crucial role as different types of antennas have different radiation patterns and gain, which can affect the coverage area. Therefore, adjusting the transmit power and using the appropriate antenna type are key factors in determining the signal coverage of an Access Point.

Ubiquitous computing refers to the concept of having many devices for one user. It involves the idea of seamlessly integrating various devices such as smartphones, tablets, wearables, and IoT devices into a user's daily life. The goal is to create an environment where these devices work together to provide a seamless and personalized user experience. This concept allows users to access and interact with their digital resources and services anytime and anywhere, making technology more pervasive and accessible in their everyday lives.

Auto-healing algorithms are used by wireless networks to solve problems related to link failure. When a link fails, it means that the connection between two devices or nodes in the network is disrupted or lost. Auto-healing algorithms are designed to automatically detect and address these failures by rerouting the traffic or establishing alternative connections. This helps to ensure that the network remains operational and the communication between devices is not interrupted.

The correct answer is "All above are wrong" because ubiquitous computing refers to the idea of having multiple interconnected devices and technologies that are seamlessly integrated into our everyday lives, allowing for constant and pervasive access to information and services. It is not limited to any specific combination of users and computers, but rather focuses on the seamless integration of technology into various aspects of our lives, regardless of the number of users or computers involved.

The correct answer is "A Wireless LAN repeater extends the range of a wireless LAN." This is because a wireless LAN repeater is a device that receives a wireless signal and retransmits it, effectively extending the range of the wireless network. An access point in a wireless LAN is similar to a hub/router in a wired LAN, as they both serve as a central connection point for devices to connect to the network. Therefore, the statement that "Access Point function in Wireless LAN is not similar with the Hub/Router in Wired LAN" is incorrect. The statement "Answer a and b are correct" is also incorrect, as only answer b is correct.

Mobile WiMAX operates in frequency bands between 2 and 6 GHz. This means that the frequencies used for Mobile WiMAX communication fall within this range. The frequency bands are important because they determine the available spectrum for Mobile WiMAX networks. By operating within the 2-6 GHz range, Mobile WiMAX can utilize a wide range of frequencies to provide high-speed wireless connectivity.

The correct answer is that both answer a and b are correct. This means that the Access Point function in Wireless LAN is indeed similar to the Hub/Router in Wired LAN, and a Wireless LAN repeater does extend the range of a wireless LAN.

A downward vertical handover refers to the event when a mobile node transitions from a higher-level network, such as a Bluetooth network, to a lower-level network, such as a WLAN network. This type of handover allows the mobile node to maintain connectivity and switch between different networks seamlessly.