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Wireless Networks Background: •Number of wireless (mobile) phone subscribers now exceeds number of wired phone subscribers –4 3 billion mobile broadband subscriptions worldwide (ITU, 2017) [1] –334 6 million smartphones sold in Q1 2016 alone [2] •Number of wireless Internet-connected devices equals number of wireline Internet-connected
(e g , WiFi wireless LAN, and cellular telephony networks) No wired network; one node coordinates the transmissions of the others (e g , Bluetooth, and ad hoc 802 11) Multi-hop Base station exists, but some nodes must relay through other nodes (e g , wireless sensor networks, and wireless mesh networks) No base station exists, and some nodes must
Wireless mobility is a must-have Like an explorer’s compass, your mobile phone has become your navigator to personal communication You use it to blaze new conversations ahead while you maintain association with current and past acquaintances Wireless computing is a need-to-have on its way to a must-have reality and is leading per-
threats to home wireless networks Piggybacking If you fail to secure your wireless network, anyone with a wireless-enabled computer within range of your wireless access point can hop a free ride on the internet over your wireless connection The typical indoor broadcast range of an access point is 150 – 300 feet Outdoors,
wireless networks are called Wi-Fi, or Wireless Fidelity, networks One of the main problems in the past with wireless networks has been the speed with which users could communicate with each other Because of new standards and emerging technologies, wireless networks now have similar connectivity speeds as hard-wired networks 1 2 3 6 9 # 5 8
networks With an 802 11-compliant wireless network, you can utilize any equivalent 802 11-compliant appliance Because most vendors, including Symbol and Telxon, have migrated their products to 802 11, you have a much greater selection of appliances for 802 11 standard networks