1 / 24

Wireless technologies

This course provides a comprehensive overview of Wireless Local Area Networks (WLANs), discussing their components, operations, and security essentials. Learn about various wireless topologies, including Basic Service Set (BSS) and Extended Service Set (ESS), and the significant advancements in WLAN standards such as IEEE 802.11a/b/g. The course covers how to configure and verify basic wireless access, troubleshoot client connectivity issues, and implement security protocols like WPA and WPA2. Ideal for anyone seeking a solid foundation in wireless networking.

seth-horne
Download Presentation

Wireless technologies

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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.

More Related