Netgear FWG114P v2 ユーザーズマニュアル

E-8

Wireless Networking Basics

The available channels supported by the wireless products in various countries are different. 

For example, Channels 1 to 11 are supported in the U.S. and Canada, and Channels 1 to 13 are 
supported in Europe and Australia.

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 United States. It is 
recommended that you start using channel 1 and grow to use channel 6, and 11 when necessary, as 
these three channels do not overlap.

Wi-Fi Protected Access (WPA) is a specification of standards-based, interoperable security 
enhancements that increase the level of data protection and access control for existing and future 
wireless LAN systems. 

The IEEE introduced the WEP as an optional security measure to secure 802.11b (Wi-Fi) WLANs, 
but inherent weaknesses in the standard soon became obvious. In response to this situation, the 
Wi-Fi Alliance announced a new security architecture in October 2002 that remedies the 
shortcomings of WEP. This standard, formerly known as Safe Secure Network (SSN), is designed 
to work with existing 802.11 products and offers forward compatibility with 802.11i, the new 
wireless security architecture being defined in the IEEE. 

4

2427 MHz

2414.5 MHz - 2439.5 MHz

5

2432 MHz

2419.5 MHz - 2444.5 MHz

6

2437 MHz

2424.5 MHz - 2449.5 MHz

7

2442 MHz

2429.5 MHz - 2454.5 MHz

8

2447 MHz

2434.5 MHz - 2459.5 MHz

9

2452 MHz

2439.5 MHz - 2464.5 MHz

10

2457 MHz

2444.5 MHz - 2469.5 MHz

11

2462 MHz

2449.5 MHz - 2474.5 MHz

12

2467 MHz

2454.5 MHz - 2479.5 MHz

13

2472 MHz

2459.5 MHz - 2484.5 MHz