NCR's Vic Hayes, who held the chair of IEEE 802.11 for ten years, along with Bell Labs engineer Bruce Tuch, approached the Institute of Electrical and Electronics Engineers (IEEE) to create a standard and were involved in designing the initial 802.11b and 802.11a specifications within the IEEE. In 1991 in the Netherlands, the NCR Corporation and AT&T invented the precursor to 802.11, intended for use in cashier systems, under the name WaveLAN. These frequency bands include the same 2.4 GHz bands used by equipment such as microwave ovens, and are thus subject to interference. Federal Communications Commission released parts of the ISM bands for unlicensed use for communications. As of 2019, some versions of Wi-Fi, running on suitable hardware at close range, can achieve speeds of 9.6 Gbit/s ( gigabit per second). Over time, the speed and spectral efficiency of Wi-Fi have increased. Hotspot coverage can be as small as a single room with walls that block radio waves or as large as many square kilometers using many overlapping access points with roaming permitted between them. The range of an access point is about 20 m (66 ft) indoors, while some access points claim up to a 150 m (490 ft) range outdoors. Many common obstructions, such as walls, pillars, home appliances, etc., may greatly reduce range, but this also helps minimize interference between different networks in crowded environments. Wi-Fi's radio bands work best for line-of-sight use. Channels can be shared between networks, but, within range, only one transmitter can transmit on a channel at a time.Ī newly installed home Wi-Fi network in April 2022 Wi-Fi most commonly uses the 2.4 gigahertz (120 mm) UHF and 5 gigahertz (60 mm) SHF radio bands these bands are subdivided into multiple channels. Different versions of Wi-Fi are specified by various IEEE 802.11 protocol standards, with different radio technologies determining radio bands, maximum ranges, and speeds that may be achieved. Compatible devices can network through wireless access points with each other as well as with wired devices and the Internet. Wi-Fi uses multiple parts of the IEEE 802 protocol family and is designed to work seamlessly with its wired sibling, Ethernet. As of 2019, over 3.05 billion Wi-Fi-enabled devices are shipped globally each year. As of 2017, the Wi-Fi Alliance consisted of more than 800 companies from around the world. Non-compliant hardware is simply referred to as WLAN, and it may or may not work with " Wi-Fi Certified" devices. Wi-Fi is a trademark of the Wi-Fi Alliance, which restricts the use of the term " Wi-Fi Certified" to products that successfully complete interoperability certification testing. These are the most widely used computer networks, used globally in home and small office networks to link devices and to provide Internet access with wireless routers and wireless access points in public places such as coffee shops, hotels, libraries, and airports to provide visitors. → The free trial only obfuscate results, but display them all : if a column is blank or empty, buying a Pro In-App feature won't make any new result appear.Wi-Fi ( / ˈ w aɪ f aɪ/) is a family of wireless network protocols based on the IEEE 802.11 family of standards, which are commonly used for local area networking of devices and Internet access, allowing nearby digital devices to exchange data by radio waves. → Some hostnames, comments, TCP ports or IPv6 addresses might be obfuscated in free trial Restrictions in free trial version compared to Pro In-App Purchase: → Go in Help → In-App purchases for more details → Like IPv4, some features in free trial and full unobfuscation through an In-App Purchase → Displays Link-Local (private) and Global (public) IPv6 addresses. → No limitation on the number of devices found ! → Hostname resolution: DNS, mDNS (Apple devices) and SMB (Windows devices) → Discover the SMB domain if any configured → Display the IP address, MAC address, hostname (4 max) and vendor associated → Scan public IP network ranges with Ping / SMB / mDNS packets → Scan your local network with ARP packets → Scan the IP range you like, from 1 IP to the whole IPv4 address space! → Auto-detection of configured interfaces: Airport, Ethernet, Virtual interfaces. LanScan is a simple and efficient IPv4 & IPv6 network scanner that discovers all active devices on any subnet: the local one, or any public subnet that you configure.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |