1. Wireless Networking
Chapter 23

2. Wireless Networking Components
Infrared or radio waves
Wireless access point (WAP)
Power over Ethernet (PoE)
Bluetooth tends to be built into PC
Wireless Networking Software
Carrier sense multiple access/collision avoidance (CSMA/CA)
Request to Send/Clear to Send (RTS/CTS)
(ACK)
Wireless Network Modes
Ad hoc mode
Peer-to-peer
Independent Basic Service Set (IBSS)
Infrastructure mode
Extended Basic Service Set (EBSS)

3. Wireless Networking Components
Wireless Networking Security
SSID – Service Set Identifier
Network name
Do not broadcast, but at least change
Access point placement and radio power
MAC Address Filtering
Accepted user list
WEP - Wired Equivalent Privacy
Not end-to-end encryption
40 bit, possibly 104 bit
Flawed

4. Wireless Networking Security
WPA – Wi-Fi Protected Access
Temporal Key Integrity Protocol (TKIP). New key per packet
Encryption key integrity checking
User authentication – Extensible Authentication Protocol (EAP)
flawed
WPA2
IEEE i standard followed
Advanced Encryption Standard (AES)
WPS – Wi-Fi Protected Setup
Push button connection setup

5. Wireless Networking Components
Speed and Range Issues
Solid objects limit the range of the signal
Signal strength and dropped packets will limits the data transfer rate

6. Wireless Networking Standards
IEEE based Wireless Networking
Lower frequency has longer range
802.11a
5.8 GHz, 54 Mbps
802.11b
2.4 GHz, 11 Mbps
802.11g
2.4 GHz, 54 Mbps
802.11n
Requires multiple antennas for (MIMO) multiple in/multiple out
2.4 GHz and 5.8 GHz, 100+Mbps
Table 22-1

7. Wireless Networking Standards
Other Wireless Standards
Infrared Wireless Networking
Infrared Data Association (IrDA) protocol
4 Mbps, 1 meter
Page 960
Bluetooth
Personal area networks (PANs)
1 Mbps or 3 Mbps
3 power/range classes
79 channels in 2.45 GHz range
Cellular

8. Installing and Configuring Wireless Networking
Wi-Fi Configuration
Ad hoc mode
Infrastructure mode
Placing access points
Omni-directional and Centered
Gaining Gain
The larger the antenna, the better the range
Bluetooth Configuration
Cellular Configuration