1. WLAN Deployment and Vertical Markets Chapter-11 Module-8B Jerry Bernardini Community College of Rhode Island 6/30/20151Wireless Networking J. Bernardini

2. Presentation Reference Material CWNA Certified Wireless Network Administration Official Study Guide (PWO-104), David Coleman, David Westcott, 2009, Chapter-11 6/30/2015Wireless Networking J. Bernardini2

3. Corporate Data Access Network access and Mobility – Reason for wireless network in corporations Wireless network is not always a replacement fro a wired network Pro/Con Pro: – Mobility, difficult locations, cheaper ($200/port wired) Con: – Slower, reliability For Access not Distribution and Core 6/30/2015Wireless Networking J. Bernardini3

4. Network Extension As 802.11 became affordable it was used for network extension Extent home networks Extend to warehouses Extent offices Fewer cables Cheaper than wiring 6/30/2015Wireless Networking J. Bernardini4

5. Bridging Networks Used to connect two or more buildings Cheaper than copper, fiber and leased line Slower than Fiber Possible leap over other private property Must have a clear line of sight Point-to-point (PTP) Point-to-multipoint (PTMP) Hub and spoke network- single point of failure Use multiple PTP bridges for reliabilite 6/30/2015Wireless Networking J. Bernardini5

6. Wireless Internet Service Provider WISP or Last –Mile network Last-mile is the connection between the end-user and the service provider (central office) Last-mile < 18,000 feet puts a limit on DSL WISP provides wireless network connection to the Internet WISP’s do not use 802.11 technology WISP’s could use WiMax 6/30/2015Wireless Networking J. Bernardini6

7. Small Office/Home Office (SOHO) For many home-based businesses Inexpensive way to set up a home-based business Uses inexpensive AP-routers, ¼ cost of corporate AP- routers Easy to setup Location flexible 6/30/2015Wireless Networking J. Bernardini7

8. Mobile Office Network Allows for setting up a network as needed and then removing No running wires, just unplug and remove Temporary offices Office extensions (with a bridge) Military maneuvers Disaster relief Concerts Flea markets Construction sites 6/30/2015Wireless Networking J. Bernardini8

9. Education Networks Safe and easy way of connecting students to a school network More cost effective than installing Ethernet jacks all over the building – Jacks would ware out with multiple-day connects and disconnects Flexible seating arrangement possible Students can work anywhere in the building Students can use their own computer 6/30/2015Wireless Networking J. Bernardini9

10. Warehousing and Manufacturing Networks One of the first applications of wireless networks – Even before 802.11 standards Vast space coverage required Mobility required Networks designed for coverage and not capacity Often specially designed hand-held wireless devices In warehouses, wireless barcode scanners have been used for some time 6/30/2015Wireless Networking J. Bernardini10

11. Healthcare Networks Require quick, secure and accurate to data Require mobile computing Wireless medical carts are common Wireless patience monitoring for vitals VoWiFi is a common application Real-time location systems (RTLS) using RFID for inventory control Potential RF interference important in hospitals Must track frequency spectrum and use in hospitals 6/30/2015Wireless Networking J. Bernardini11

12. Municipal Networks Many announcements but few implementations Communities have underestimated the cost of providing the service Tax dollars have not found its way to compleating the networks Many projects canceled Some projects scaled back to smaller area Some projects are supported by a business group 6/30/2015Wireless Networking J. Bernardini12

13. Hotspots Free or pay-for-use Internet access Available in cafes, bookstores, hospitality locations, airports and hotels To attract and service customers Up to $40/month for a subscription not working Authentication using a Captive Portal – A browser page is used for authentication and use-agreement Hotspots are not secure Must use VPN for security 6/30/2015Wireless Networking J. Bernardini13

14. Transportation Networks Wireless networks for trains, planes, ships and ferries A mobile uplink service is necessary WiMAX, cellular telephone or satellite is used WiMAX is being more and more as it is deployed Airlines are starting to provide WiFi in flight using cellular to ground stations – Airlines must use bandwidth metering to prevent monopolizing the connection 6/30/2015Wireless Networking J. Bernardini14

15. Law-Enforcement Networks WiFi is a supplement to public-safety wireless networks WiFi inside police stations is common Outside WiFi signals highly encrypted Many use Supervisory control and data acquisition (SCADA) – non-WiFi Police car equipped with video surveillance automatically download file when in WiFi range (upon return to station) 6/30/2015Wireless Networking J. Bernardini15

16. First-Responder Networks Upon arriving on a scene a mobile 802.11 network can be setup Can cover the entire scene area A WiFi bridge can be used to connect to an emergency network During a disaster the network can be used for tagging and triage 6/30/2015Wireless Networking J. Bernardini16

17. Fixed Mobile Convergence (FMC) Currently convergence of WiFi and cellular technology (WiMAX soon) A single wireless device will switch between networks, always using the lowest cost In the office WiFi is used for communications Outside the office cellular is used FMC roaming allows start a call on WiFi and seamlessly switching to cellular IEEE 802.11u could standardize FMC communications 6/30/2015Wireless Networking J. Bernardini17

18. WLAN and Health Is it safe to use WiFi and Cellular? World Health Organizations says its safe WiFi signals are lower power than other devices No know adverse health effects But concerns still exist – especially for cellular 6/30/2015Wireless Networking J. Bernardini18

19. WLAN Vendors Vendors provided varied products and services WLAN Categories Infrastructure- Aruba, Cisco, Motorola, Xirrus, … Mesh Infrastructure- BelAir, Firetide, Meraki, Tropos, … Troubleshooting and Design- Airmagnet, Wildpackets, … Management- Airwave, Wavelink,.. Security Solutions-AirDefense, AirTight, Juniper, … VoWiFi Solutions-Acom, Polycom, Vocera, … Fixed Mobile Convergence- Agito, DiVitas RTLS Solutions-AeroScout, Newbury, … SOHO-Apple, Buffalo, Belkin, Linksys, SMC, … Refer to Pages 378-380 for vendor links 6/30/2015Wireless Networking J. Bernardini19