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Wireless technologies

Wireless technologies. LAN Switching and Wireless – Chapter 7 and Fundamentals of Wireless LANs course basics. Objectives. Describe the components and operations of basic wireless LAN topologies. Describe the components and operations of basic wireless LAN security.

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Wireless technologies

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  1. Wireless technologies LAN Switching and Wireless– Chapter 7 and Fundamentals of Wireless LANs course basics

  2. Objectives • Describe the components and operations of basic wireless LAN topologies. • Describe the components and operations of basic wireless LAN security. • Configure and verify basic wireless LAN access. • Configure and troubleshoot wireless client access.

  3. What is Wireless LAN? • Wireless LAN (WLAN) - provides all the features and benefits of traditional LAN technologies such as Ethernet and Token Ring, but without the limitations of wires or cables.

  4. Other Wireless Technologies • Cellular • Bluetooth or PAN (Personal Area Network) • 3G (3rd Generation) • UWB (Ultra Wide Band) • FSO (Free Space Optics) • Radio waves off meteor trails!

  5. 54 Mbps Speed 860 Kbps 1 and 2 Mbps 1 and 2 Mbps 11 Mbps Standards-based Network Proprietary 5 GHz Radio 900 MHz 2.4 GHz 2.4 GHz 1986 1998 2000 2002 1988 1990 1992 1994 1996 WLAN evolution • Warehousing • Healthcare • Education • Businesses • Home 802.11 Ratified 802.11a,b Ratified 802.11g Drafted • IEEE 802.11Begins Drafting

  6. 54 Mbps Speed 860 Kbps 1 and 2 Mbps 1 and 2 Mbps 11 Mbps Standards-based Network Proprietary 5 GHz Radio 900 MHz 2.4 GHz 2.4 GHz 1986 1998 2000 2003 1988 1990 1992 1994 1996 Current standards – 802.11 a/b/g • 802.11a • Up to 54 Mbps • 5 GHz • Not compatible with either 802.11b or 802.11g • 802.11b • Up to 11 Mbps • 2.4 GHz • 802.11g • Up to 54 Mbps • 2.4 GHz 802.11 Ratified 802.11a,b Ratified 802.11g Ratified • IEEE 802.11Begins Drafting 802.11g is backwards compatible with 802.11b, but with a drawback (later)

  7. Physical Layer radio modulations • 802.11b (11MBit / 2.4GHz) • FHSS – Frequency Hopping Spread Spectrum • DSSS – Direct Sequence Spread Spectrum • 802.11g (54MBit / 2.4 GHz) • OFDM – Ortogonal Frequency Division Multiplexing • 802.11a (54MBit / 5 GHz) • OFDM – Ortogonal Frequency Division Multiplexing

  8. Explain the Components and Operations of Basic Wireless LAN Topologies • Describe why wireless LANs are a popular choice for small business LAN implementations

  9. Explain the Components and Operations of Basic Wireless LAN Topologies • Describe the components of a 802.11-based wireless infrastructure

  10. Wireless LANs components • Describe the components of a 802.11-based wireless infrastructure In-building Infrastructure • 1200 Series (802.11a and 802.11b) • 1100 Series (802.11b) • 350 Series (802.11b) not shown

  11. Antennas • Describe the components of a 802.11-based wireless infrastructure Antenna • 2.4GHz Antennas • 5 GHz Antennas

  12. Cables / Accessories Cable and Accessories • Low Loss Cable • Antenna Mounts • Lightening Arrestor • Describe the components of a 802.11-based wireless infrastructure Antenna • 2.4GHz Antennas • 5 GHz Antennas

  13. Explain the Components and Operations of Basic Wireless LAN Topologies • Basic Service Set (BSS) / Infrastructure • Extended Service Set (ESS) • Independent Basic Service Set (IBSS) / Ad-hoc

  14. ESS roaming feature • Describe how to plan a wireless LAN • A WLAN designer must determinewhether clients will require seamlessroaming from access point to access point. • Not yet standardized by IEEE 802.11IAPP (Inter-Access Point Protocol)

  15. Explain the Components and Operations of Basic Wireless LAN Security • Describe the threats to wireless LAN security

  16. Explain the Components and Operations of Basic Wireless LAN Security • Describe the wireless protocols. The description will include a description of 802.1x, a comparison of WPA and WPA2 as well as comparison of TKIP and AES

  17. Explain the Components and Operations of Basic Wireless LAN Security • Describe how to secure a wireless LAN from the key security threats

  18. Configure and Verify Basic Wireless LAN Access • Configure a wireless access point

  19. Configure and Verify Basic Wireless LAN Access • Configure a wireless NIC

  20. Configure and Troubleshoot Wireless Client Access • Describe how to solve access point firmware issues

  21. Configure and Troubleshoot Wireless Client Access • Describe how to solve authentication problems associated with wireless LANs

  22. Summary • Wireless LANs use standards such as • IEEE 802.11a • IEEE 802.11b • IEEE 802.11g • IEEE 802.11n • Basic Service set • Mobile clients use a single access point for connectivity • Extended service set • Multiple access point that share an SSID

  23. Summary • WLAN security practices/methods include • MAC address filtering • SSID making • Implementing WPA2 • Configuration of wireless NIC and access point • Configure both of them the same way • SSID • Ensure that the latest firmware is installed • Troubleshooting WLANs include doing the following: • Check channel setting • Check for interference

  24. Záver prezentácie Ďakujem za pozornosť. Moderné vzdelávanie pre vedomostnú spoločnosť.Projekt je spolufinancovaný zo zdrojov EÚ.

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