Wireless technologies LAN Switching and Wireless Chapter 7

Objectives § Describe the components and operations of basic wireless LAN topologies. § Describe

What is Wireless LAN? § Wireless LAN (WLAN) - provides all the features and

Other Wireless Technologies § Cellular § Bluetooth or PAN (Personal Area Network) § 3

WLAN evolution §Warehousing §Healthcare §Education §Businesses §Home Speed 860 Kbps Radio 900 MHz 2.

Current standards – 802. 11 a/b/g Speed 860 Kbps Radio 900 MHz 2. 4

Physical Layer radio modulations § 802. 11 b (11 MBit / 2. 4 GHz)

Explain the Components and Operations of Basic Wireless LAN Topologies § Describe why wireless

Explain the Components and Operations of Basic Wireless LAN Topologies § Describe the components

Wireless LANs components § Describe the components of a 802. 11 -based wireless infrastructure

Antennas § Describe the components of a 802. 11 -based wireless infrastructure Antenna •

Cables / Accessories § Describe the components of a 802. 11 -based wireless infrastructure

Explain the Components and Operations of Basic Wireless LAN Topologies Basic Service Set (BSS)

ESS roaming feature § Describe how to plan a wireless LAN § A WLAN

Explain the Components and Operations of Basic Wireless LAN Security § Describe threats to

Explain the Components and Operations of Basic Wireless LAN Security § Describe the wireless

Explain the Components and Operations of Basic Wireless LAN Security § Describe how to

Configure and Verify Basic Wireless LAN Access § Configure a wireless access point ITE

Configure and Verify Basic Wireless LAN Access § Configure a wireless NIC ITE 1

Configure and Troubleshoot Wireless Client Access § Describe how to solve access point firmware

Configure and Troubleshoot Wireless Client Access § Describe how to solve authentication problems associated

Summary § Wireless LANs use standards such as IEEE 802. 11 a IEEE 802.

Summary § WLAN security practices/methods include –MAC address filtering –SSID making –Implementing WPA 2

ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public

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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. ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 2

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. ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 3

Other Wireless Technologies § Cellular § Bluetooth or PAN (Personal Area Network) § 3 G (3 rd Generation) § UWB (Ultra Wide Band) § FSO (Free Space Optics) § Radio waves off meteor trails! ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 4

WLAN evolution §Warehousing §Healthcare §Education §Businesses §Home Speed 860 Kbps Radio 900 MHz 2. 4 GHz 1986 ITE 1 Chapter 6 Standards-based Proprietary Network 1988 1990 © 2006 Cisco Systems, Inc. All rights reserved. 11 Mbps 54 Mbps 1 and 2 Mbps IEEE 802. 11 Begins Drafting 1992 Cisco Public 1994 5 GHz 2. 4 GHz 1996 802. 11 Ratified 802. 11 a, b 802. 11 g Ratified Drafted 1998 2000 2002 5

Current standards – 802. 11 a/b/g Speed 860 Kbps Radio 900 MHz 2. 4 GHz 1986 Standards-based Proprietary Network 1988 11 Mbps 54 Mbps 1 and 2 Mbps 1990 IEEE 802. 11 Begins Drafting 1992 1994 5 GHz 2. 4 GHz 1996 802. 11 Ratified 802. 11 a, b 802. 11 g Ratified 1998 2000 2003 § 802. 11 a Up to 54 Mbps 5 GHz Not compatible with either 802. 11 b or 802. 11 g § 802. 11 b Up to 11 Mbps 2. 4 GHz § 802. 11 g Up to 54 Mbps ITE 1 Chapter 6 Cisco Systems, Inc. All rights reserved. 2. 4© 2006 GHz 802. 11 g is backwards compatible with 802. 11 b, but with a drawback (later) Cisco Public 6

Physical Layer radio modulations § 802. 11 b (11 MBit / 2. 4 GHz) FHSS – Frequency Hopping Spread Spectrum DSSS – Direct Sequence Spread Spectrum § 802. 11 g (54 MBit / 2. 4 GHz) OFDM – Ortogonal Frequency Division Multiplexing § 802. 11 a (54 MBit / 5 GHz) OFDM – Ortogonal Frequency Division Multiplexing ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 7

Explain the Components and Operations of Basic Wireless LAN Topologies § Describe why wireless LANs are a popular choice for small business LAN implementations ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 8

Explain the Components and Operations of Basic Wireless LAN Topologies § Describe the components of a 802. 11 -based wireless infrastructure ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 9

Wireless LANs components § Describe the components of a 802. 11 -based wireless infrastructure In-building Infrastructure • 1200 Series (802. 11 a and 802. 11 b) • 1100 Series (802. 11 b) • 350 Series (802. 11 b) not shown ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 10

Antennas § Describe the components of a 802. 11 -based wireless infrastructure Antenna • 2. 4 GHz Antennas • 5 GHz Antennas ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 11

Cables / Accessories § Describe the components of a 802. 11 -based wireless infrastructure Cable and Accessories • Low Loss Cable • Antenna Mounts Antenna • Lightening Arrestor • 2. 4 GHz Antennas • 5 GHz Antennas ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 12

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

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) ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 14

Explain the Components and Operations of Basic Wireless LAN Security § Describe the wireless protocols. The description will include a description of 802. 1 x, a comparison of WPA and WPA 2 as well as comparison of TKIP and AES ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 16

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

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

Summary § Wireless LANs use standards such as IEEE 802. 11 a IEEE 802. 11 b IEEE 802. 11 g IEEE 802. 11 n § Basic Service set –Mobile clients use a single access point for connectivity § Extended service set –Multiple access point that share an SSID ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 22

Summary § WLAN security practices/methods include –MAC address filtering –SSID making –Implementing WPA 2 § 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 ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 23