Development of Wireless Router
With the development of information technology, the Internet has become indispensable to modern family life, part of the modern families often require multiple computers simultaneously Internet and with wireless Internet access has become a trend. But now the market standard for wireless routing protocol there are many, which makes the user does not know how to choose, then we will contrast different perspectives of two standard 11G and 11N advantages and disadvantages, so that consumers make more informed choices.
People enjoy the convenience of wireless networks in the same time, also suffer from a wireless Internet connection was weak or no signal to connect the signal "blind spots" and the rate of unsatisfactory range of issues. IEEE 802.11n protocol is born in such circumstances, 300M wireless transmission rate and signal a broader range of coverage to meet people on the bandwidth, speed and convenience needs.
Sights on the needs of public wireless networks, with the major manufacturers have launched their own characteristics, all priced 802.11n wireless router. On the current market situation, is still the mainstream product's 54M 802.11g wireless router, more and more fierce market competition. 11n wireless router with the route continued price cuts, now 54M and 300M wireless router price gap between the minimum has been within a hundred dollars, to face such a situation, most consumers will choose to purchase higher performance, but high prices can not How many of 11n wireless products, 802.11n and 802.11g wireless router that the gap between, are just products is between 300M and 54M this simple digital difference?
Santa Rosa platform code is still used in Merom Core 2 Duo processor, while a code Robson (English name: Turbo Memory) and NAND flash memory technology has also been introduced. Of course, for wireless users, the Centrino four most striking of its three generations 3945ABG wireless module will be upgraded to support 802.11n in 4965AG/AGN (Intel PRO / Wireless 4965 802.11 a / b / g / n). Performance compared to the Imperial IEEE 802.11a / g standards, has been greatly improved and boasting beyond the 802.11a / g five times the transfer rate and twice the signal range.
Major manufacturers introduced their own products, have joined their own unique technology that enables 802.11n wireless router signal stronger, more stable network, faster speed, they have accelerated the rate of adoption of 11n wireless routing. 11g and 11n of the transfer speed compared
11g and 11n of the transfer speed compared
Compared to current mainstream 11g, 802.11n standard is the biggest feature in the speed has been greatly improved.
Let's take a look at the characteristics of 802.11g - IEEE 802.11g and previous 802.11 standards use than its 2.4G band OFDM modulation, the actual data transfer rate up to 20Mbps or more; 802.11g and 802.11b standards to the WIFI system connected with each other, were in the same AP network, the protection of the backward compatibility.
802.11g, like 802.11b work with the 2.4-2.4835GHz band, frequency band, total bandwidth of 83.5MHz, 83.5MHz frequency band will be divided into 14 sub-channels, each channel bandwidth of 22MHz. Can provide up to 1,6,11 or 13, etc. 3 non-overlapping channels simultaneously. The transmission rate under the 54/48/36/24/18/12/9/6M adaptive 11g, 11b under the 11/5.5/2/1M adaptive.
Thus, the current 802.11g standard theoretical maximum speed of 54Mbps, the maximum actual data transfer rate up to 20Mbps or more.
The 802.11n standard as the latest wireless standard, WLAN transfer rate of 54Mbps from the 802.11a and 802.11g increased to more than 108Mbps, the maximum rate of up to 540/600Mbps.
Thanks to the MIMO (Multiple Input Multiple Output) and OFDM (orthogonal frequency division multiplexing) technology combines the application of the MIMO OFDM technology, this technology not only improves the quality of wireless transmission, but also to greatly enhance the transfer rate.
At present, manufacturers introduced products based on 802.11n draft standard, which can provide the maximum theoretical speed of 300/270Mbps (not yet complete as standard up to 140Mbps or so), the maximum actual data transfer rate up to 70Mbps or more. In the 11n standard, respectively, to support 270/243/216/162/108/81/54/27Mbps, 135/121.5/108/81/54/40.5/27/13.5Mbps, 130/117/104/78/52 / 39/26/13Mbps, 65/58.5/52/39/26/19.5/13/6.5Mbps adaptive transmission speed.
Thus, the current draft 802.11n standard products listed, although not enough because the standard of maturity, has not reached the Intel claimed that the "new wireless technology commonly used than the current 802.11g network speeds around 5 times faster on" However, three times faster is an indisputable fact. From this point of view, the current draft 802.11n standard products already have good washability. 11g compatibility with the 11n contrast
11g compatibility with the 11n contrast
Although the different chipset manufacturers of 802.11n or MIMO products there are compatibility issues with each other, but the draft 802.11n products are kept on 11g / b products a good compatibility. As we all know, 802.11g and 802.11b standards to the WIFI system connected with each other, coexist in the same wireless network to ensure the backward compatibility, so that existing WLAN system can smooth the transition to high-speed wireless local area network to extend the 802.11b products service life and reduce the user's investment.
802.11b and 802.11g 802.11n technology and the compatibility of different technologies are talking about the past, its main advantage for mixed-mode operation and backward compatibility. In the draft 802.11n, 802.11n products required to include 802.11g and 802.11b in mixed mode operation and backward compatibility. The mixed-mode operation designates that, unlike previous proprietary networking technologies, 802.11n networks operating with legacy products and must maintain optimum speeds. Backward compatibility ensures that under the conditions of the use of 802.11n, wireless products based on existing standards for the operation to achieve their best.
In an 802.11n wireless network, access to the user including 802.11b, 802.11g and 802.11n for the user, in which case, 802.11b users and the router is using the 802.11b standard, 802.11g user connection is The 802.11g standard uses, 802.11n 802.11n connection the user is in the process of connecting all types of transmission can be achieved coexistence, this way users can better protect the investment for 802.11n.
In the new 4th generation Santa Rosa Centrino, although literally removed their support for 802.11b, 802.11g standards, but in fact it can still be completely through the compatibility of 802.11b standard and products. We have a number of 802.11n wireless router settings mode you can see, it can work in 11n, 11g, 11g and 11b, 11n and 11g and 11b, 11n and 11g and other state, which means that 802.11n products also have good downward compatibility. But the need here is to remind everyone that the composition of the mixture in the two networks, the standard should be the lower of (802.11g) encryption, or usage patterns of the subject, saying that the straightforward point is automatically Xiangzhi 802.11n 设备802.11g or 11b of the mode. 11g and 11n of safety between
11g and 11n of safety between
In the process of using the wireless routing, in addition to transmission rate, the people may be more concerned about the security problem. 802.11g products only support WPA encryption, while 802.11n products richer than 802.11g products, such as WPA Personal encryption state can choose WPA2, WPA and WPA2 and WPA mixed mode encryption. WPA2 is the second version of WPA, and WPA (IEEE 802.11i draft 3) compared, WPA2 (IEEE 802.11i) increased the more powerful of the CCMP (AES, AES-CCMP) encryption, WPA2 can better meet Some businesses and government agencies, the user needs to import AES.
Some wireless network equipment, said the WPA-PSK/WPA2-PSK is WPA/WPA2, but its to pre-share key or passphrase authentication mode to replace the IEEE 802.1X/EAP authentication mode, as PSK mode does not have to Use the authentication server (such as RADIUS Server), so its particularly suitable for home or SOHO products or users.
In the operating system, Windows XP SP2 comes with the perfect support WZC to WPA/WPA2, because it already contains the Windows WPA Client, and if you are using the Windows operating system much earlier, you must download from Microsoft Windows WPA Client installation before it can be set on WPA/WPA2, in order to achieve good compatibility.
Total Results:
Introduced by the above comparison we can find, 802.11n products and 11g products in use and there are no major differences in the transmission speed has greatly increased, in coverage, with minor penetration strong, and also maintained a good down compatibility, security, the improvement is more. After the wireless network in 2008 after the rapid development, 802.11n products are now in the market were gradually accepted by consumers, product prices fell from the original thousand dollars to several hundred dollars now, which for the consumer to that is the best news. 802.11n to functionality and performance as the basis, with the advantage of declining prices are a little bit of occupation belonging to the 11g home wireless network equipment market, I believe that the formal regularization with the 802.11n protocol, real life will belong to our network come.
People enjoy the convenience of wireless networks in the same time, also suffer from a wireless Internet connection was weak or no signal to connect the signal "blind spots" and the rate of unsatisfactory range of issues. IEEE 802.11n protocol is born in such circumstances, 300M wireless transmission rate and signal a broader range of coverage to meet people on the bandwidth, speed and convenience needs.
Sights on the needs of public wireless networks, with the major manufacturers have launched their own characteristics, all priced 802.11n wireless router. On the current market situation, is still the mainstream product's 54M 802.11g wireless router, more and more fierce market competition. 11n wireless router with the route continued price cuts, now 54M and 300M wireless router price gap between the minimum has been within a hundred dollars, to face such a situation, most consumers will choose to purchase higher performance, but high prices can not How many of 11n wireless products, 802.11n and 802.11g wireless router that the gap between, are just products is between 300M and 54M this simple digital difference?
Santa Rosa platform code is still used in Merom Core 2 Duo processor, while a code Robson (English name: Turbo Memory) and NAND flash memory technology has also been introduced. Of course, for wireless users, the Centrino four most striking of its three generations 3945ABG wireless module will be upgraded to support 802.11n in 4965AG/AGN (Intel PRO / Wireless 4965 802.11 a / b / g / n). Performance compared to the Imperial IEEE 802.11a / g standards, has been greatly improved and boasting beyond the 802.11a / g five times the transfer rate and twice the signal range.
Major manufacturers introduced their own products, have joined their own unique technology that enables 802.11n wireless router signal stronger, more stable network, faster speed, they have accelerated the rate of adoption of 11n wireless routing. 11g and 11n of the transfer speed compared
11g and 11n of the transfer speed compared
Compared to current mainstream 11g, 802.11n standard is the biggest feature in the speed has been greatly improved.
Let's take a look at the characteristics of 802.11g - IEEE 802.11g and previous 802.11 standards use than its 2.4G band OFDM modulation, the actual data transfer rate up to 20Mbps or more; 802.11g and 802.11b standards to the WIFI system connected with each other, were in the same AP network, the protection of the backward compatibility.
802.11g, like 802.11b work with the 2.4-2.4835GHz band, frequency band, total bandwidth of 83.5MHz, 83.5MHz frequency band will be divided into 14 sub-channels, each channel bandwidth of 22MHz. Can provide up to 1,6,11 or 13, etc. 3 non-overlapping channels simultaneously. The transmission rate under the 54/48/36/24/18/12/9/6M adaptive 11g, 11b under the 11/5.5/2/1M adaptive.
Thus, the current 802.11g standard theoretical maximum speed of 54Mbps, the maximum actual data transfer rate up to 20Mbps or more.
The 802.11n standard as the latest wireless standard, WLAN transfer rate of 54Mbps from the 802.11a and 802.11g increased to more than 108Mbps, the maximum rate of up to 540/600Mbps.
Thanks to the MIMO (Multiple Input Multiple Output) and OFDM (orthogonal frequency division multiplexing) technology combines the application of the MIMO OFDM technology, this technology not only improves the quality of wireless transmission, but also to greatly enhance the transfer rate.
At present, manufacturers introduced products based on 802.11n draft standard, which can provide the maximum theoretical speed of 300/270Mbps (not yet complete as standard up to 140Mbps or so), the maximum actual data transfer rate up to 70Mbps or more. In the 11n standard, respectively, to support 270/243/216/162/108/81/54/27Mbps, 135/121.5/108/81/54/40.5/27/13.5Mbps, 130/117/104/78/52 / 39/26/13Mbps, 65/58.5/52/39/26/19.5/13/6.5Mbps adaptive transmission speed.
Thus, the current draft 802.11n standard products listed, although not enough because the standard of maturity, has not reached the Intel claimed that the "new wireless technology commonly used than the current 802.11g network speeds around 5 times faster on" However, three times faster is an indisputable fact. From this point of view, the current draft 802.11n standard products already have good washability. 11g compatibility with the 11n contrast
11g compatibility with the 11n contrast
Although the different chipset manufacturers of 802.11n or MIMO products there are compatibility issues with each other, but the draft 802.11n products are kept on 11g / b products a good compatibility. As we all know, 802.11g and 802.11b standards to the WIFI system connected with each other, coexist in the same wireless network to ensure the backward compatibility, so that existing WLAN system can smooth the transition to high-speed wireless local area network to extend the 802.11b products service life and reduce the user's investment.
802.11b and 802.11g 802.11n technology and the compatibility of different technologies are talking about the past, its main advantage for mixed-mode operation and backward compatibility. In the draft 802.11n, 802.11n products required to include 802.11g and 802.11b in mixed mode operation and backward compatibility. The mixed-mode operation designates that, unlike previous proprietary networking technologies, 802.11n networks operating with legacy products and must maintain optimum speeds. Backward compatibility ensures that under the conditions of the use of 802.11n, wireless products based on existing standards for the operation to achieve their best.
In an 802.11n wireless network, access to the user including 802.11b, 802.11g and 802.11n for the user, in which case, 802.11b users and the router is using the 802.11b standard, 802.11g user connection is The 802.11g standard uses, 802.11n 802.11n connection the user is in the process of connecting all types of transmission can be achieved coexistence, this way users can better protect the investment for 802.11n.
In the new 4th generation Santa Rosa Centrino, although literally removed their support for 802.11b, 802.11g standards, but in fact it can still be completely through the compatibility of 802.11b standard and products. We have a number of 802.11n wireless router settings mode you can see, it can work in 11n, 11g, 11g and 11b, 11n and 11g and 11b, 11n and 11g and other state, which means that 802.11n products also have good downward compatibility. But the need here is to remind everyone that the composition of the mixture in the two networks, the standard should be the lower of (802.11g) encryption, or usage patterns of the subject, saying that the straightforward point is automatically Xiangzhi 802.11n 设备802.11g or 11b of the mode. 11g and 11n of safety between
11g and 11n of safety between
In the process of using the wireless routing, in addition to transmission rate, the people may be more concerned about the security problem. 802.11g products only support WPA encryption, while 802.11n products richer than 802.11g products, such as WPA Personal encryption state can choose WPA2, WPA and WPA2 and WPA mixed mode encryption. WPA2 is the second version of WPA, and WPA (IEEE 802.11i draft 3) compared, WPA2 (IEEE 802.11i) increased the more powerful of the CCMP (AES, AES-CCMP) encryption, WPA2 can better meet Some businesses and government agencies, the user needs to import AES.
Some wireless network equipment, said the WPA-PSK/WPA2-PSK is WPA/WPA2, but its to pre-share key or passphrase authentication mode to replace the IEEE 802.1X/EAP authentication mode, as PSK mode does not have to Use the authentication server (such as RADIUS Server), so its particularly suitable for home or SOHO products or users.
In the operating system, Windows XP SP2 comes with the perfect support WZC to WPA/WPA2, because it already contains the Windows WPA Client, and if you are using the Windows operating system much earlier, you must download from Microsoft Windows WPA Client installation before it can be set on WPA/WPA2, in order to achieve good compatibility.
Total Results:
Introduced by the above comparison we can find, 802.11n products and 11g products in use and there are no major differences in the transmission speed has greatly increased, in coverage, with minor penetration strong, and also maintained a good down compatibility, security, the improvement is more. After the wireless network in 2008 after the rapid development, 802.11n products are now in the market were gradually accepted by consumers, product prices fell from the original thousand dollars to several hundred dollars now, which for the consumer to that is the best news. 802.11n to functionality and performance as the basis, with the advantage of declining prices are a little bit of occupation belonging to the 11g home wireless network equipment market, I believe that the formal regularization with the 802.11n protocol, real life will belong to our network come.
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