USB wireless network card purchase skills

With the IEEE 802.11 standard wireless network technologies mature, product performance enhancements, and product prices should be gradually reduced, making more and more enterprises, home users have begun to subordinates based on the IEEE802.11 standard for wireless networks.

In the user terminal, while Intel's Centrino notebook computers have built-in wireless card, and can and most mainstream wireless devices are compatible, but, taking into account those non-Centrino platform for notebook computers and desktop machines, select a the appropriate cost-effective wireless network card, dell inspiron 6000 battery so that the end product can be fast, easy access to the wireless network the trend has become inescapable. After all, the promotion of less than three years before Centrino technology, the wireless LAN market, there are still a great market space.

Interface Analysis

As a wireless network, an important part of the wireless network card can help users to immediately access the wireless network that supports mobile users, temporary workstations, shared network equipment and wireless multimedia, which makes choosing a suitable wireless card is not an easy one matter. And looking at the market all kinds of various types of wireless network card products, not difficult to find, USB interface, wireless LAN, in particular, to support the USB 2.0 standard is no doubt wireless cards have the highest cost and compatibility.

As we all know, the mainstream market, the wireless card also has a wide range of models, brand number, price varies in different performance characteristics. Just from the point of view can be divided into three kinds of interface types - Standard PCI-based, PCMCIA type, USB type, non-standard MiniPCI type, CF type as well as SD-type and so on. Among them, a standard PCI interface, a wireless network card can only be used on the desktop, PCMCIA interface, a wireless network card can only be used in notebook computers, while the USB interface, a wireless network card can be used in any computer with a USB interface, this The main advantage of it. If the user wants easy to use, choose USB wireless network card may well be an excellent choice.

Transfer rate

Today, USB interface, mainly use two criteria - USB1 .1, and USB2.0. hp nc8230 battery The former maximum data transfer speed of 12Mbps, while the latter can be as high as 480Mbps. As the wireless transmission protocol also has the highest speed limit, so in order to avoid creating bottlenecks on the market any products using the 802.11b protocol used in almost all USB1.1 standard, using the 802.11g protocol products use the USB2.0 standard. So, when a user in the purchase without having to worry about different standards brought about because of the speed bottleneck. In addition, the type of connection USB adapter can be divided into two categories: one category can be directly plugged into the computer's USB interface, this card has the advantage of portability, easy to use, easy bruising drawback is that card; and those is through a USB data cable to connect card and the computer, the advantages of such a card is easy to protect the card, pleasing in appearance, one disadvantage is that more data lines, resulting in cable interference. Users according to their own needs to choose the right card type. USB wireless network card at present There are two main forms of appearance were: box-type and U-type plate. Box-based USB wireless cards come with a data extension, most of the antenna exposed, these designs make it easier to put on the desktop. U disk-shaped USB wireless cards generally have the data to extend the line, and its USB connector can also directly access the computer's USB port, U-shaped USB disk antenna are built-in wireless card, so adjust the antenna pointing inconvenience. A comparison, or U disk-type card is more compact and convenient.

In selecting the wireless network card, and purchase other wireless devices similar to the first look at its wireless standards, wireless standards is to determine the speed and price of the main factor when users purchase a wireless access point based on their transmission speed to carry out choice, faster wireless network card in general the higher the price. Meanwhile, the security of the wireless network card is also very important factor. If your wireless AP supports advanced security features, but the wireless card is not supported, then the high level of security features to no. Therefore, the user chooses to support security features as number of wireless cards. Finally, take note that after-sales service and warranty.

Optional Note

In selecting a suitable USB wireless network card, we also support the wireless network card wireless LAN standard to choose. Currently on the market of wireless LAN equipment can be divided into two kinds of IEEE 802.11b and IEEE 802.11g. Which supported the 802.11b standard card maximum rate of 11Mbps, to support the highest rate card 802.11g standard up to 54Mbps, is 5 times the standard 802.11b and 802.11g wireless card can also support backward compatible 802.11b standard, has a higher nature and applicability, and can protect the user's equipment investment for the network card. In addition, gateway m320 battery the current 802.11b standard wireless network card products will be in the next period of time gradually eliminated by the market, so when the purchase card should try to select 802.11g standards.

Transmit Power - USB wireless network adapter is currently transmitting power more in 15 ~ 17dBm. The higher power can be transmitted from the more distant, so we try to choose products with a higher transmission power. Especially those who were well-known manufacturers introduced a new antenna technology, but also can improve the signal coverage of wireless network card for the mobile office and wireless LAN high-speed Internet offers new personalization options.