At present, there are a wide range of wireless cards on the market. Which disturbed consumers is how to select an appropriate and portable wireless network card. USB wireless network card is such an appropriate wireless card.
Accordance with the interface and types of points, wireless network card into PCMCIA, PCI interface and USB interface of three. Which, PCMCIA dedicated notebook, PCI interface for desktop machines can be directly plugged into the desktop motherboard PCI slot, while the USB interface, while both can be used in notebook computers, but also can be used in desktop , with plug and play, easy to carry, use and flexible and so on. If you want to choose USB-type, what should pay attention to?
First is the standard of wireless network. Currently on the market of wireless LAN equipment can be divided into support for IEEE 802.11b and IEEE 802.11g support of the two products. The wireless USB network adapter card supports IEEE 802.11b standard, the maximum rate of 11Mbps, the card supports IEEE 802.11g standard, the maximum rate of up to 54Mbps, backward compatible with IEEE 802.11b standard, so the best choice when purchasing card support for IEEE 802.11g standard products.
Second is the interface mode. Support USB 2.0/1.1/1.0 currently on the market products that are, but most of the USB interface, USB2.0 interface products have been adopted. USB2.0 interface standard can provide 480Mbps data communication bandwidth, while the speed of USB1.0 is much slower.
Again is the transmission power. USB wireless network card has a certain amount of transmission power. The higher power can be transmitted from the more distant, so try to choose products with a higher transmission power. Especially the recently introduced antenna technology, but also can improve the signal coverage of wireless network card for the mobile office and wireless LAN high-speed Internet to provide new options.
In addition, the current main box USB wireless network adapter type and U Disc two kinds of appearance form. 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.
Summarize, if you need to buy USB wireless network card, choose to support the IEEE 802.11g standard and uses USB2.0 interface, U-disk-based wireless network card is quite a good choice.
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