Netgear Router WGR614 User Manual

Reference Manual for Cable/DSL Wireless Router WGR614 
Preparing Your Network C-21
 
Restarting the Network
Once you’ve set up your computers to work with the firewall, you must reset the network for the 
devices to be able to communicate correctly. Restart any computer that is connected to the firewall.
After configuring all of your computers for TCP/IP networking and restarting them, and 
connecting them to the local network of your WGR614 router, you are ready to access and 
configure the firewall. 

Reference Manual for Cable/DSL Wireless Router WGR614 
C-22 Preparing Your Network
 
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Wireless Networking Basics D-1
 
Appendix D
Wireless Networking Basics
This chapter provides an overview of Wireless networking.
Wireless Networking Overview
The WGR614 router conforms to the Institute of Electrical and Electronics Engineers (IEEE) 
802.11 standard for wireless LANs (WLANs) and a product update will bring the WGR614 into 
conformance to the 802.11g standard when it is ratified. On an 802.11b or g wireless link, data is 
encoded using direct-sequence spread-spectrum (DSSS) technology and...

Reference Manual for Cable/DSL Wireless Router WGR614 
D-2 Wireless Networking Basics
 
In the infrastructure mode, the wireless access point converts airwave data into wired Ethernet 
data, acting as a bridge between the wired LAN and wireless clients. Connecting multiple Access 
Points via a wired Ethernet backbone can further extend the wireless network coverage. As a 
mobile computing device moves out of the range of one access point, it moves into the range of 
another. As a result, wireless clients...

Reference Manual for Cable/DSL Wireless Router WGR614 
Wireless Networking Basics D-3
 
Authentication and WEP
The absence of a physical connection between nodes makes the wireless links vulnerable to 
eavesdropping and information theft. To provide a certain level of security, the IEEE 802.11 
standard has defined two types of authentication methods, Open System and Shared Key. With 
Open System authentication, a wireless PC can join any network and receive any messages that are 
not encrypted. With...

Reference Manual for Cable/DSL Wireless Router WGR614 
D-4 Wireless Networking Basics
 
• Shared Key Authentication requires that the station and the access point have the same WEP 
Key to authenticate. These two authentication procedures are described below.
Open System Authentication
The following steps occur when two devices use Open System Authentication:
1.The station sends an authentication request to the access point.
2.The access point authenticates the station.
3.The station associates with the...

Reference Manual for Cable/DSL Wireless Router WGR614 
Wireless Networking Basics D-5
 
5.The station connects to the network.
If the decrypted text does not match the original challenge text (i.e., the access point and station do 
not share the same WEP Key), then the access point will refuse to authenticate the station and the 
station will be unable to communicate with either the 802.11 network or Ethernet network.
This process is illustrated in below.
Figure 7-5:  Shared key authentication
Overview...

Reference Manual for Cable/DSL Wireless Router WGR614 
D-6 Wireless Networking Basics
 
3. Use WEP for Authentication and Encryption: A transmitting 802.11 device encrypts the data 
portion of every packet it sends using a configured WEP Key. The receiving 802.11 device 
decrypts the data using the same WEP Key. For authentication purposes, the 802.11 network uses 
Shared Key Authentication.
Note: Some 802.11 access points also support Use WEP for Authentication Only (Shared Key 
Authentication without...

Reference Manual for Cable/DSL Wireless Router WGR614 
Wireless Networking Basics D-7
 
WEP Configuration Options
The WEP settings must match on all 802.11 devices that are within the same wireless network as 
identified by the SSID. In general, if your mobile clients will roam between access points, then all 
of the 802.11 access points and all of the 802.11 client adapters on the network must have the same 
WEP settings. 
Note: Whatever keys you enter for an AP, you must also enter the same keys for...

Reference Manual for Cable/DSL Wireless Router WGR614 
D-8 Wireless Networking Basics
 
The radio frequency channels used are listed in Ta b l e 7-1:
Note: The available channels supported by the wireless products in various countries are different.
The preferred channel separation between the channels in neighboring wireless networks is 25 
MHz (5 channels). This means that you can apply up to three different channels within your 
wireless network. There are only 11 usable wireless channels in the...