INSY 3303 -- Topic_7 => Connecting Through a Wireless Network

INSY 3303 -- Topic_7 => Connecting Through a Wireless Network

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Topic #7 – Connecting through a Wireless Network Objectives Explain current wireless networking technologies Discuss the history of wireless networks and their advantages Describe radio wave technologies Explain 802.11 radio wave networking Describe alternative radio wave technologies, such as Bluetooth, HiperLAN, and HomeRF Shared Wireless Access Protocol Discuss infrared wireless technologies Describe wireless MAN networking Describe terrestrial and satellite microwave technologies Consider design options for wireless networks Current Wireless Technologies Two drawbacks of wire-based networking Tangle of wires connecting computer and peripherals Cost of pulling wires through walls, ceilings, floors Wireless technology resolves many wire-based issues Wireless media are forms of electromagnetic radiation Three major current wireless networking technologies Radio wave technologies (short range) Infrared technologies (short range) Terrestrial and satellite microwave technologies (long range) A Short History of Wireless Networks Packet radio: early PC networking over radio waves Developed by amateur (ham) radio operators Built around TNC (terminal node controller) Wireless standards develop in parallel with ham radio 1985: Industrial, Scientific, Medical (ISM) band opened Telecommunications Act of 1996 IEEE 802.11 standard set in 1997 A few of the entities influencing standards IEEE (Institute of Electrical and Electronics Engineers) IETF (International Engineering Task Force) ISO (International Organization for Standardization) Computer Networks & Distributed 
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Advantages of Wireless Networks Needs accommodated by wireless networks Enabling communications in remote areas Reducing installation costs Providing “anywhere” access Simplifying small office and home office networking Enabling data access to fit the application Providing an Alternative to Wired Networks Scenario 1: link two buildings separated by highway Option 1: Dig out trench, lay cable, fill in trench Option 2: Create MAN using T-lines or Optical Ethernet Option 3: Install wireless network Likely to be more cost effective than option 1 or option 2 Scenario 2: network for 77 employees in rented office Installation of cable plant prohibited by owner Solve problem by setting up wireless network Scenario 3: network library restricted by covenants Install wireless network to upgrade facility Wireless option maintains compliance with covenants Saving Money and Time Factors favoring choice of wireless over cable Expense, speed, safety, low impact Scenario: network supporting university fundraiser Extra network connections needed for new staff Installation of new cables not practical Expensive proposition Not possible within time frame Solution: install wireless network Saves time and money
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