1. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE I Chapter 6 1 Wireless technologies LAN Switching and Wireless – Chapter 7 and Fundamentals of Wireless LANs course basics

2. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 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. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 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. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 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. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 5 WLAN evolution 860 Kbps 900 MHz 1 and 2 Mbps 2.4 GHz Proprietary  Warehousing  Healthcare  Education  Businesses  Home 802.11 Ratified 802.11a,b Ratified 802.11g Drafted 1986 19881990199219941996 199820002002 1 and 2 Mbps2.4 GHz11 Mbps 54 Mbps Standards-based 5 GHz Radio Network Speed  IEEE 802.11Begins Drafting

6. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 6 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 860 Kbps 900 MHz 1 and 2 Mbps 2.4 GHz Proprietary 802.11 Ratified 802.11a,b Ratified 1986 19881990199219941996 199820002003 1 and 2 Mbps2.4 GHz11 Mbps 54 Mbps Standards-based 5 GHz Radio Network Speed  IEEE 802.11Begins Drafting 802.11g is backwards compatible with 802.11b, but with a drawback (later) 802.11g Ratified

7. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 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. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 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. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 9 Explain the Components and Operations of Basic Wireless LAN Topologies  Describe the components of a 802.11-based wireless infrastructure

10. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 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. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 11 Antennas  Describe the components of a 802.11-based wireless infrastructure Antenna 2.4GHz Antennas 5 GHz Antennas

12. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 12 Cables / Accessories  Describe the components of a 802.11-based wireless infrastructure Antenna 2.4GHz Antennas 5 GHz Antennas Cable and Accessories Low Loss Cable Antenna Mounts Lightening Arrestor

13. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 13 Explain the Components and Operations of Basic Wireless LAN Topologies  Independent Basic Service Set (IBSS) / Ad-hoc  Basic Service Set (BSS) / Infrastructure  Extended Service Set (ESS)

14. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 14 ESS roaming feature  Describe how to plan a wireless LAN  A WLAN designer must determine whether clients will require seamless roaming from access point to access point.  Not yet standardized by IEEE 802.11 IAPP (Inter-Access Point Protocol)

15. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 15 Explain the Components and Operations of Basic Wireless LAN Security  Describe the threats to wireless LAN security

16. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 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. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 17 Explain the Components and Operations of Basic Wireless LAN Security  Describe how to secure a wireless LAN from the key security threats

18. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 18 Configure and Verify Basic Wireless LAN Access  Configure a wireless access point

19. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 19 Configure and Verify Basic Wireless LAN Access  Configure a wireless NIC

20. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 20 Configure and Troubleshoot Wireless Client Access  Describe how to solve access point firmware issues

21. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 21 Configure and Troubleshoot Wireless Client Access  Describe how to solve authentication problems associated with wireless LANs

22. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 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. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 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. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 24 Záver prezentácie Ďakujem za pozornosť. Moderné vzdelávanie pre vedomostnú spoločnosť. Projekt je spolufinancovaný zo zdrojov EÚ.