1. OV 3 - 1 Copyright © 2015 Logical Operations, Inc. All rights reserved. Unbounded Network Media  Wireless Networking  Wireless Network Devices and Components  Install a Wireless Network

2. OV 3 - 2 Copyright © 2015 Logical Operations, Inc. All rights reserved. OSI Model Location Application 7 Presentation 6 Session 5 Transport 4 Network 3 Data Link 2 Physical 1

3. OV 3 - 3 Copyright © 2015 Logical Operations, Inc. All rights reserved. Wireless Communication Signals are transmitted over a distance without the use of a physical medium

4. OV 3 - 4 Copyright © 2015 Logical Operations, Inc. All rights reserved. The IEEE 802.11 Standard StandardSpeed (Mbps)Frequency (Ghz) Range (meters) MIMO Streams 802.11a545201 802.11ac433/channel5358 802.11b112.41001 802.11g542.41001 802.11n1502.4 or 5704

5. OV 3 - 5 Copyright © 2015 Logical Operations, Inc. All rights reserved. Frequencies and Overlap of Wireless Channels 2 2.417 1 2.412 3 2.422 4 2.427 5 2.432 6 2.437 7 2.442 8 2.447 9 2.452 10 2.457 11 2.462 12 2.467 13 2.472 14 2.484 Channel Center Frequency (GHz)

6. OV 3 - 6 Copyright © 2015 Logical Operations, Inc. All rights reserved. Radio Networking Signals are sent via RF waves

7. OV 3 - 7 Copyright © 2015 Logical Operations, Inc. All rights reserved. Broadcast Radio Non-directional single frequency transmission

8. OV 3 - 8 Copyright © 2015 Logical Operations, Inc. All rights reserved. Spread Spectrum Signal is sent over more than one frequency

9. OV 3 - 9 Copyright © 2015 Logical Operations, Inc. All rights reserved. Types of Spread Spectrum  OFDM  DSSS

10. OV 3 - 10 Copyright © 2015 Logical Operations, Inc. All rights reserved. Infrared Transmission  Signals sent as infrared light pulses.  Transmit at 300 GHz to 300,000 GHz.  Receiver needs unobstructed view of sender.  Signal can reflect off hard surfaces.  Used for:  Remote control systems.  Security sensors.  Manufacturing sensors.

11. OV 3 - 11 Copyright © 2015 Logical Operations, Inc. All rights reserved. Bluetooth 30 meters

12. OV 3 - 12 Copyright © 2015 Logical Operations, Inc. All rights reserved. Microwave Transmission Sender transmits electromagnetic signals Receiver has an unobstructed view

13. OV 3 - 13 Copyright © 2015 Logical Operations, Inc. All rights reserved. Wireless Access Points Device that provides a connection between wireless devices WAP

14. OV 3 - 14 Copyright © 2015 Logical Operations, Inc. All rights reserved. Wireless Controllers  Provide wireless LAN management for multiple access points.  Used in combination with the LWAPP.  Can be a physical device or a software application.  LWAPP is a protocol that controls multiple Wi-Fi wireless access points.

15. OV 3 - 15 Copyright © 2015 Logical Operations, Inc. All rights reserved. Wireless Bridges Wireless Router Wireless Bridge Receives signal from wireless router and provides connection to wired devices

16. OV 3 - 16 Copyright © 2015 Logical Operations, Inc. All rights reserved. Wireless Antennas Wireless TowerDish Antenna

17. OV 3 - 17 Copyright © 2015 Logical Operations, Inc. All rights reserved. Wireless Antenna Types Directional AntennaOmni-directional Antenna

18. OV 3 - 18 Copyright © 2015 Logical Operations, Inc. All rights reserved. Wireless Antenna Performance Factors  Infrared:  Sunlight  Obstacles  Smoke, dust, fog  Radio:  Antenna signal characteristics  Wire mesh in walls, thick walls  Ambient electrical noise  Conductive obstacles  Other electrical equipment  Data transmission rate  Microwave:  Weather  Antenna signal characteristics  Line of sight  Distance between transmitting stations

19. OV 3 - 19 Copyright © 2015 Logical Operations, Inc. All rights reserved. WLAN Overview Wireless connectivity device Client systems

20. OV 3 - 20 Copyright © 2015 Logical Operations, Inc. All rights reserved. WLAN Architecture  STA  AP  Service sets  BSS and BSSID  ESS and ESSID  IBSS  DS

21. OV 3 - 21 Copyright © 2015 Logical Operations, Inc. All rights reserved. 802.11 Modes ESS Distributed System Infrastructure mode

22. OV 3 - 22 Copyright © 2015 Logical Operations, Inc. All rights reserved. 802.11 Modes (Cont.) Ad-hoc mode

23. OV 3 - 23 Copyright © 2015 Logical Operations, Inc. All rights reserved. SSID Broadcasts  Continuous announcement by WAP.  Transmits its name (SSID).  Often referred to as a beacon.  If a WAP is password-protected, devices can see it but not connect to it.

24. OV 3 - 24 Copyright © 2015 Logical Operations, Inc. All rights reserved. Mobile Devices  Mobile phone  Laptop  Tablet  Gaming device  Media device

25. OV 3 - 25 Copyright © 2015 Logical Operations, Inc. All rights reserved. Guidelines for Implementing a Basic Wireless Network  Create a list of requirements.  Consider devices and how they meet your requirements.  Consider environmental limitations.  Consider equipment limitations.  Consider compatibility requirements.  Choose appropriate 802.11 technology.  Choose appropriate AP placement locations.  Install APs.  Test after installation:  Appropriately sized  Secure  Operational  Document steps and establish a baseline.

26. OV 3 - 26 Copyright © 2015 Logical Operations, Inc. All rights reserved. Reflective Questions 1.In your opinion, what are the primary considerations for implementing a wireless network? 2.What problems have you encountered when setting up a wireless network?