© 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
© 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.
© 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.
© 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!
© 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 Ratified a,b Ratified g Drafted and 2 Mbps2.4 GHz11 Mbps 54 Mbps Standards-based 5 GHz Radio Network Speed IEEE Begins Drafting
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 6 Current standards – a/b/g a Up to 54 Mbps 5 GHz Not compatible with either b or g b Up to 11 Mbps 2.4 GHz g Up to 54 Mbps 2.4 GHz 860 Kbps 900 MHz 1 and 2 Mbps 2.4 GHz Proprietary Ratified a,b Ratified and 2 Mbps2.4 GHz11 Mbps 54 Mbps Standards-based 5 GHz Radio Network Speed IEEE Begins Drafting g is backwards compatible with b, but with a drawback (later) g Ratified
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 7 Physical Layer radio modulations b (11MBit / 2.4GHz) FHSS – Frequency Hopping Spread Spectrum DSSS – Direct Sequence Spread Spectrum g (54MBit / 2.4 GHz) OFDM – Ortogonal Frequency Division Multiplexing a (54MBit / 5 GHz) OFDM – Ortogonal Frequency Division Multiplexing
© 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
© 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 based wireless infrastructure
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 10 Wireless LANs components Describe the components of a based wireless infrastructure In-building Infrastructure 1200 Series (802.11a and b) 1100 Series (802.11b) 350 Series (802.11b) not shown
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 11 Antennas Describe the components of a based wireless infrastructure Antenna 2.4GHz Antennas 5 GHz Antennas
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 12 Cables / Accessories Describe the components of a based wireless infrastructure Antenna 2.4GHz Antennas 5 GHz Antennas Cable and Accessories Low Loss Cable Antenna Mounts Lightening Arrestor
© 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)
© 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 IAPP (Inter-Access Point Protocol)
© 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
© 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
© 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
© 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
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 19 Configure and Verify Basic Wireless LAN Access Configure a wireless NIC
© 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
© 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
© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 22 Summary Wireless LANs use standards such as IEEE a IEEE b IEEE g IEEE n Basic Service set –Mobile clients use a single access point for connectivity Extended service set –Multiple access point that share an SSID
© 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
© 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.