1. Wireless standards Unit objective Compare and contrast different wireless standards Install and configure a wireless network Implement appropriate wireless security measures

2. Topic A Topic A: Wireless standards Topic B: Install and configure wireless networks Topic C: Implement wireless security

3. The 802.1x standard Frequency band divisions –Military –Broadcasters –Amateur radio operators Broadcast signal is a security issue IEEE 802.1x –Port-based authentication framework for access to Ethernet networks –Designed for wired Ethernet networks –Applies to 802.11 WLANs continued

4. 802.1x, continued Requires three roles in authentication process –Device requesting access –Authenticator –Authentication server Allows multiple authentication algorithms Is an open standard

5. The 802.11 standard Operates in 2.4–2.5 GHz band Used for wireless networks OSI Data Link layer Two ways to configure a network –Ad hoc –Infrastructure Places specifications on Physical and MAC layers

6. Access point Transparent bridge between wireless clients and wired network Includes –At least one interface to connect to wired network –Transmitting equipment to connect with wireless clients –IEEE 802.1D bridging software

7. Major wireless protocols StandardSpeedsFrequencyIndoor distance Outdoor distance Interference 802.11b<= 11 Mbps 2.4 GHz45 m90 mYes 802.11a<= 54 Mbps 5 GHz15 m30 mNo; Not compatible with 802.11b 802.11g20+ Mbps Advertised 54 Mbps 2.4 GHz45 m90 mYes; Compatible with 802.11b 802.11n<= 600 Mbps 2.4 or 5 GHz 70 m250 mNo; Compatible with 802.11g, b, a 802.16<= 11 Mbps 10–66 or 2–11 GHz 31 milesNo

8. Device compatibility 802.11a not compatible with 802.11b –Some devices equipped to support either 802.11a or 802.11b 802.11n backward-compatible with 802.11b and 802.11g –Many modern access points support multiple standards

9. Channels 802.11g and b use 2.4–2.5 GHz with 11 channels 5 MHz apart Most routers default to channel 6 Closely located wireless networks using the same or adjacent channels can interfere with one another Can change the default channel on the wireless AP to decrease interference –Apply to both AP and its clients

10. Channel bonding Allows devices to use two adjacent channels at once Doubles bandwidth Primary or control channel Secondary or extension channel Works with both 2.4 and 5 GHz frequencies Works best in 5 GHz band with 802.11n standard

11. MIMO Multiple-input and multiple-output Pronounced my-moh or me-moh Uses multiple antennas at both transmitter and receiver Increases data throughput and wireless link range Available in 802.11n and 802.11g Not suitable for long-range point-to- point links using external antenna

12. Activity A-1 Comparing wireless networking standards

13. Topic B Topic A: Wireless standards Topic B: Install and configure wireless networks Topic C: Implement wireless security

14. 802.11 networking Wireless NICs Access point –Speeds –Placement

15. Configuration options Encryption Firmware updates Change default administrator accounts Change default SSID Disable SSID RADIUS DMZ Disable DHCP MAC filtering 802.1X

16. Activity B-1 Configuring a wireless access point (instructor demo)

17. Configuring wireless clients Windows Zero Configuration Options 802.1X

18. RADIUS Authentication RADIUS client requests from APs Shared keys

19. Activity B-2 Configuring a wireless client (instructor demo)

20. Topic C Topic A: Wireless standards Topic B: Install and configure wireless networks Topic C: Implement wireless security

21. Wireless security Access control Encryption Authentication Isolation

22. Transmission encryption WEP WPA Personal WPA2 WPA Enterprise RADIUS 802.11i EAP, LEAP, PEAP

23. Activity C-1 Discussing wireless security measures

24. Unit summary Compared and contrasted different wireless standards Installed and configured a wireless network Implemented appropriate wireless security measures