Wireless cards and wireless internet card small knowledge

Wireless network card definition of the so-called wireless networks, is the use of radio waves as a medium of information transmission of the wireless local area network (WLAN), and the use of wired network is very similar to the largest difference in the transmission medium, the use of radio technology to replace the network cable, and wired network for backup, but too slow

Wireless network card is the equipment of the terminal wireless networks, wireless LAN wireless coverage under the wireless network for Internet access to the use of radio terminals. Specifically, the wireless network card is to enable your computer to use wireless to access the device, but with a wireless card also requires a connection to the wireless networks, if you are in the home or location of the wireless router or wireless AP (Accesspoint wireless access point) coverage, The wireless network can be wirelessly connected to the Internet via the wireless card.

Wireless network card standard 1.IEEE 802.11a: Use 5GHz band, transmission speed 54Mbps, and 802.11b incompatible;

2.IEEE 802.11b: Use 2.4GHz band, transmission speed 11Mbps;

3.IEEE 802.11g: Use 2.4GHz band, transmission speed 54Mbps, can be backward-compatible with 802.11b;

4.IEEE 802.11n (Draft 2.0): For Intel's new Centrino 2 notebooks and high-end routes, backward-compatible, transfer speed 300Mbps.

Wireless Card interface Type 1. Desktop-specific PCI interface wireless network card

2. Notebook computer Special Pcmica Interface network card

3.USB Interface Wireless network card

4. Notebook computer built-in MINI-PCI wireless network card

The difference between a wireless card and a wireless adapter the wireless network card and the wireless internet cards look very much like, but the function is very different. Through this comparison a more visible, although both can realize the wireless network function, but its realization way and the way is very different. All wireless network cards can only be limited to the scope of the existing wireless LAN. If you want to be outside the scope of wireless LAN coverage, that is, wireless Internet access through the wide area network, the computer will have a wireless network card on the basis of the same time configure wireless internet cards.

Because the mobile phone signal coverage is much larger than the wireless LAN environment, all wireless Internet card greatly reduce the dependence on the geographical area, for the vast number of individual users more convenient to apply. So, wireless card and wireless network card although can realize wireless function, but the way and the way is completely different.

Wireless network card is mainly used in wireless LAN for LAN connection, there is no line by or wireless AP Such access equipment can be used, and wireless network card is like a normal 56K modem like the use of mobile phone signals can be covered anywhere Internet access, the novice should pay attention to the difference

Wireless network card using a light wireless card can not connect to wireless networks, but also must have a wireless AP, the equivalent of a wired network of hubs. You can connect to a wireless network only if you have the appropriate settings in the area where the wireless AP is covered.

Wireless Internet access is rely on wireless network card, of course, matching also need no Line by (wireless cat).

Wireless card is equivalent to the receiver, no line by (wireless cat) equivalent to the transmitter. In fact, the need for wired Internet access to the wireless cat, and then the signal into wireless signal sent out, received by the wireless network card.

Generally no line can be towed 2~4 wireless card, working distance within 50 meters, the effect is better, far the quality of communication is poor. This wireless solution, strictly speaking, is just a wireless fabric, and the working environment must be next to the wired network.

The price of a set varies from 120~200.

The other is pure wireless, which requires communication equipment, such as **********, or Internet-capable mobile phones, etc., which are connected to the computer through dedicated data lines, receiving signals from satellite or wireless network services, but not very fast and expensive to communicate. And the price of satellite receiver and mobile phone is also very expensive, usually in 650~2000 range, the advantage is that even if you are in the barren Hills Wild Ridge also can surf the internet (of course, have a computer).

Both of these options can be used on laptops and desktops, of course, the desktop is not easy to move, wireless is not much significance.