【 Weak current College 】 common external wireless network adapter selection guide and tips

With the rapid development of wireless network, currently in the select network connection start gradually from Wired to wireless. Wireless networks use not only let the layout more compact, but also for the personal computer equipment of mobile portability can offer a lot of convenience, to join the wireless network of camps on current hot topics. Current external wireless network card there are three main:

1.PCI interface, apply to the desktop.

2.PCMCIA interface, suitable for notebooks.

3.USB interface for laptops and desktops.

First, let's from versatility, stability, signal strength, prices, compare the three network cards.

1. versatility

From versatility, because of the USB can clean desktop and notebook USB, no doubt, the best available and when the signal is strong enough, you can with a USB extension cable to the network card is placed in the window or door.

2. stability

PCI interface card, regardless of power consumption, maximum PCB dimensions, heat is not a problem, so the best stability. PCMCIA interface card, because to take into account the electricity consumption, PCB size is larger, the calorific value is greater, the stability is inferior to the PCI card USB network adapter, the PCB size is very small, maximum calorific value, often due to heat large causing no Internet, domestics in TP-Link and tengda products often have this problem.

3. signal strength

PCI card with external antenna signal strongest; PCMCIA times (when the USB network connection does not signal, I use PCMCIA network card); USB adapter signal worst.

4. price

USB network adapters because the space is small, the use of Crystal antenna, so the highest prices; PCMCIA network card and PCI network card price is almost the same. Select a adapter typically consider these factors: the type of computer, network, signal, and price. Now we press the computer type:
1) desktop:

-If you leave the route more recently, the absence of a signal, it is recommended to select with PCI interface. The reason is simple, stable and overwhelming.

-If the signal is poor, the preferred USB adapter + USB extension cord. Second, consider using an external antenna for PCI card + outsourcing of antenna.

2) notebook:

-If you leave the route more recently, the absence of a signal, it is recommended to select with PCMCIA interface.

-If the signal is poor, the choice of USB adapter + USB extension cord.

2. purchase tips

1, security. Personal opinion, WLAN product safety is the most important, and in fact protect data against interception and theft also has been a WLAN users care most about. Because the WLAN in the data transfer is fully exposed to the air, and signal coverage, if security is not good, legitimate user's data to easily be illegal to intercept and decipher the user. At the same time, illegal user can masquerade as a legitimate user, and the legitimate users of common use of network resources, so that the legitimate interests of users. But the good news is currently the vast majority of wireless networking products manufacturers employ encryption technology or to provide users with a comprehensive set of wireless security solution that allows illegal user wants to trolling.

Due to various factors, the present different manufacturers provide data encryption technology and security solution, this is to buy wireless card with extreme caution. Some manufacturers provide multi-level security system, including the spread spectrum encoding and encryption technology, and information through 40 and 128 bit WiredEquivalentPrivacy (WEP) encryption method, without loss of performance offers and the same security cable network.

2. data transmission speed. Wireless card the size of the transfer rate depends primarily on the adoption of the specification. At present, wireless networking standard, as compared to other standard IEEE802.11b, great advantages, so now most of the wireless networking products have been used, IEEE802.11b standard IEEE802.11b compliant product theoretical transmission speeds is 11Mbps, most based on 802 .11b WLAN products are nominal "speed 11M", but this is exactly the ideal environmental conditions, the actual use subject to the influence of environmental factors also affected by the impact of product quality, product quality, the transfer speed will be a gap, that we should pay attention to the selection.

3 compatibility. If you want to separate the purchase and your existing WLAN products of different manufacturers of network cards, we should consider the compatibility. Now most of WLAN products are used for the production of standard IEEE802.11b, generally speaking, if the manufacturer is able to fully comply with the specifications to production of WLAN products, produced by products can and other meets this standard product compatibility, otherwise it is possible to completely incompatible or compatibility is not good. Want to know this is not difficult, we see that the products have passed Wi-Fi certified, or have no access to Wi-Fi certification. Wi-Fi certified is based on the wireless LAN IEEE802.11b standard products, only through the certification of products in order to ensure and other products based on 802.11B specification compatible.

At present, the market, including the wireless card, many wireless networking products are compatible with IEEE802.11B standard specification, but they have passed Wi-Fi certified? this is what we have to seriously consider. Wi-Fi testing is very strict, according to the requirements for the same manufacturer of different models and different versionsProducts are tested separately, OEM products need to be tested again.

4. network interface type. Wireless network card PCI main interface type, PCMCIA, USB, etc. Among them, the PCI interface is used primarily for desktop because it and memory interface, more suitable for built-in and portable system is more appropriate to use PCMCIA interface, USB interface is suitable for all kinds of computers, it transferred faster, but is not very convenient to carry, because PCI and PCMCIA interface can be plugged into the notebook or desktop, it can be placed inside the computer, the USB network adapter you want to bring the user additional, more trouble. However specific candidates which interface depends on the user's actual situation, such as some notebook user PCMIA interface have been occupied by other equipment, or USB interface.

5, ease of use. Some wireless network installation and maintenance is more complex, there is no professional technicians is very difficult to complete the driver and other aspects of the installation, and some wireless network card setup maintenance but relatively simple, we want to buy in to watch out for. For ease of use of the product, even if the dealer has promised you help you install debugging, also try not to buy, because it would give later maintenance a lot of trouble.

6, price. WLAN compared to wired local area network products, prices are more expensive, this is also the increasing popularity of restricting the WLAN. At present, various wireless card price difference is larger, there's a cost factor, quality and brand, we buy the best selection of the more famous brands.

Finally, we recommend the purchase of WLAN products purchased separately when it is best not to complete the purchase, it will not only avoid compatibility issues, and device performance will play a more impressive, secure solutions will become more perfect, however, for notebook users, of course, is not guaranteed to go to where to go for WLAN devices with your wireless network card is the same brand.