Wireless local area network

Wireless local area network (WLAN) is a type of computer network that allows devices to connect and communicate with each other without the use of physical cables or wires, utilizing radio waves and microwaves as transmission media, as described by James Clerk Maxwell and Heinrich Hertz. This technology has revolutionized the way people access and share information, enabling devices such as laptops, smartphones, and tablets to connect to the internet and communicate with each other, as seen in the development of Wi-Fi by Vic Hayes and the IEEE 802.11 standard. The use of WLANs has become widespread, with many organizations, including Google, Microsoft, and Apple, incorporating them into their networks, and with the help of Cisco Systems and Juniper Networks. WLANs have also been adopted by various institutions, such as Harvard University, Stanford University, and Massachusetts Institute of Technology.

Introduction

The concept of WLANs was first introduced in the 1970s by Norman Abramson and his team at the University of Hawaii, who developed the ALOHAnet system, a precursor to modern WLANs, which was later improved upon by Robert Metcalfe and David Boggs at Xerox PARC. The development of WLANs was further accelerated by the introduction of the IEEE 802.11 standard in 1997, which provided a framework for the development of WLAN technologies, as outlined by Vic Hayes and the IEEE 802.11 working group. Today, WLANs are used in a wide range of applications, including home networks, enterprise networks, and public hotspots, with companies like AT&T, Verizon Communications, and T-Mobile US providing WLAN services. WLANs have also been used in various events, such as the Olympic Games and the Super Bowl, to provide wireless connectivity to attendees, with the help of Intel Corporation and IBM.

Architecture

The architecture of a WLAN typically consists of a number of components, including access points (APs), wireless routers, and client devices such as laptops and smartphones, as designed by Cisco Systems and Juniper Networks. The APs act as a bridge between the wireless and wired networks, providing a connection point for client devices to access the network, as described by Radia Perlman and Yogen Dalal. The wireless routers, on the other hand, provide the necessary infrastructure for the WLAN, including DHCP and NAT services, as developed by Microsoft and Apple. Client devices use wireless network interface cards (WNICs) to connect to the WLAN, which are designed by companies like Intel Corporation and Broadcom Corporation. The architecture of a WLAN can be designed to provide a range of services, including internet access, file sharing, and printer sharing, as seen in the development of Windows and macOS by Microsoft and Apple.

Standards

The development of WLAN standards has been driven by the IEEE 802.11 working group, which has produced a number of standards for WLAN technologies, including IEEE 802.11b, IEEE 802.11g, and IEEE 802.11n, as outlined by Vic Hayes and the IEEE 802.11 working group. These standards provide a framework for the development of WLAN technologies, including the physical layer and media access control (MAC) layer, as described by Robert Metcalfe and David Boggs. Other organizations, such as the Wi-Fi Alliance, have also played a key role in the development of WLAN standards, including the Wi-Fi Direct and Wi-Fi Protected Setup standards, as developed by Google, Microsoft, and Apple. The use of standards has helped to ensure interoperability between different WLAN devices and has driven the widespread adoption of WLAN technologies, as seen in the development of Android and iOS by Google and Apple.

Security

The security of WLANs is a critical concern, as they are vulnerable to a range of threats, including hacking and eavesdropping, as described by Bruce Schneier and Kevin Mitnick. To address these threats, a number of security measures have been developed, including WEP, WPA, and WPA2, as outlined by IEEE 802.11 and the Wi-Fi Alliance. These measures provide a range of security features, including encryption and authentication, as developed by RSA Security and VeriSign. Other security measures, such as firewalls and intrusion detection systems, can also be used to protect WLANs from threats, as seen in the development of Cisco Systems and Juniper Networks. The use of security measures has helped to protect WLANs from threats and has driven the widespread adoption of WLAN technologies, as used by Google, Microsoft, and Apple.

Applications

WLANs have a wide range of applications, including home networks, enterprise networks, and public hotspots, as developed by AT&T, Verizon Communications, and T-Mobile US. They are also used in a range of industries, including healthcare, finance, and education, as seen in the development of Electronic health record and Online banking by Epic Systems and Bank of America. WLANs have also been used in various events, such as the Olympic Games and the Super Bowl, to provide wireless connectivity to attendees, with the help of Intel Corporation and IBM. The use of WLANs has helped to improve productivity and efficiency, and has driven the widespread adoption of mobile devices, as developed by Apple, Samsung Electronics, and Huawei.

Comparison_to_other_networks

WLANs have a number of advantages and disadvantages compared to other types of networks, including wired local area networks (WLANs) and wide area networks (WANs), as described by Robert Metcalfe and Vint Cerf. WLANs offer a number of advantages, including mobility and flexibility, as seen in the development of Laptop and Smartphone by Apple and Samsung Electronics. However, they also have a number of disadvantages, including security risks and interference, as outlined by Bruce Schneier and Kevin Mitnick. Compared to WANs, WLANs offer a number of advantages, including higher speeds and lower costs, as developed by AT&T and Verizon Communications. However, they also have a number of disadvantages, including limited range and interference, as seen in the development of Cellular network by Qualcomm and Ericsson. Overall, WLANs offer a number of benefits and are widely used in a range of applications, as used by Google, Microsoft, and Apple. Category:Computer networks