Week 11 - Data Communications and Networking 2 PDF

Southville International School and Colleges Wireless Networks [email protected]  Data Communications and Networking 2 A.Y. 2024 - 2025 Wireless Networks A wireless network lets people communicate and access information without using physical...

Southville International School and Colleges Wireless Networks [email protected]  Data Communications and Networking 2 A.Y. 2024 - 2025 Wireless Networks A wireless network lets people communicate and access information without using physical wires. It allows freedom to move around and use applications in different areas, whether in a building, city, or even worldwide. Wireless networks use radio waves or infrared light to send data between users, servers, and databases. This type of communication is invisible to us, and we don't see the signals traveling through the air. Data Communications and Networking 2 A.Y. 2024 - 2025 Wi-Fi Back to Basics  Data Communications and Networking 2 A.Y. 2024 - 2025 Wi-Fi Back to Basics 1970s - Early wireless network development The University of Hawaii develop an early wireless network in the 1970s, known as ALOHA. It was designed to allow communication between computers across the Hawaiian Islands, using radio waves. ALOHA was a pioneering system that laid the groundwork for modern wireless communication technologies, including Wi-Fi.  Data Communications and Networking 2 A.Y. 2024 - 2025 Wi-Fi Back to Basics 1991 - IEEE and WLAN standards In 1991, the Institute of Electrical and Electronics Engineers (IEEE) began to discuss standardizing wireless local area networks (WLAN). This was the start of work toward the development of a widely accepted standard for wireless communication.  Data Communications and Networking 2 A.Y. 2024 - 2025 Wi-Fi Back to Basics 1997 - 802.11 standard In 1997, the IEEE ratified the 802.11 standard, which is the technical foundation for Wi-Fi. This standard defined how wireless devices communicate over short distances. "802.11" is the official name of the Wi-Fi technology, though "Wi-Fi" became the more common term for the technology we use today. Data Communications and Networking 2 A.Y. 2024 - 2025 Reasons for Wireless Networks  Data Communications and Networking 2 A.Y. 2024 - 2025 Reasons for Wireless Networks People need to communicate while on the move. It's hard or impossible to use wired connections in certain areas, like remote or outdoor locations. Wireless systems can be set up quickly. It's cheaper to install wireless systems at the start. The same information needs to be shared with many different places at once. Data Communications and Networking 2 A.Y. 2024 - 2025 Problems with Wireless Networks  Data Communications and Networking 2 A.Y. 2024 - 2025 Problems with Wireless Networks Wireless networks work in less predictable environments, so they are more likely to face problems like interference, signal loss, noise, or people eavesdropping on the communication. Wireless networks usually have slower data speeds compared to wired (guided) networks. It's easier to reuse frequencies with wired networks than with wireless ones. This means wired networks can handle more connections without interference. Data Communications and Networking 2 A.Y. 2024 - 2025 Types of Wireless Networks Data Communications and Networking 2 A.Y. 2024 - 2025  Data Communications and Networking 2 A.Y. 2024 - 2025 Wireless Personal Area Network (WPAN) Wireless PAN enables the Interconnection of Computer Devices within Close Reach of the User.  Data Communications and Networking 2 A.Y. 2024 - 2025 Wireless Personal Area Network (WPAN) A WPAN (Wireless Personal Area Network) is a type of network that works within a short range, typically about 20 feet. Most WPANs use radio waves to send data wirelessly through the air, like Bluetooth devices. Some WPANs use infrared light instead of radio waves to transfer data. These are not affected by radio interference, but they do need a clear line of sight between devices (meaning they have to be in direct view of each other) for the connection to work properly.  Data Communications and Networking 2 A.Y. 2024 - 2025 Wireless Local Area Network (WLAN) A Wireless LAN enables the interconnection of Computer Devices within a building.  Data Communications and Networking 2 A.Y. 2024 - 2025 Wireless Local Area Network (WLAN) A WLAN (Wireless Local Area Network) covers a larger area than a WPAN, typically up to 100 meters between the access point (AP) and devices, or between devices themselves. WLANs work much like traditional wired Ethernet networks, meaning they offer similar performance, cost, and operation, but without the need for physical cables.  Data Communications and Networking 2 A.Y. 2024 - 2025 Wireless Metropolitan Area Network (WMAN) Wireless MAN is an alterative for Homes and Companies Needing to Connect to an Internet Service.  Data Communications and Networking 2 A.Y. 2024 - 2025 Wireless Metropolitan Area Network (WMAN) This technology connects multiple networks over a larger area, like different buildings in a city. It's a good alternative or backup to running expensive copper or fiber cables. The most well-known example of this technology is WiMax.  Data Communications and Networking 2 A.Y. 2024 - 2025 Wireless Wide Area Network (WWAN) A Wireless WAN is capable of supporting Mobile Applications over a Wide Area.  Data Communications and Networking 2 A.Y. 2024 - 2025 Wireless Wide Area Network (WWAN) These networks can cover large areas, like cities or even whole countries, using multiple satellites or antenna sites managed by an Internet Service Provider (ISP). These are called 2nd Generation systems. However, WWANs (Wireless Wide Area Networks) are expensive to set up because they need to cover such a large area.  Southville International School and Colleges Wireless Networks [email protected]