Wireless LAN is defined so-called Wi-Fi, is the use of radio waves as an information transmission medium consisting of a wireless local area network (WLAN), and the cable network uses a very similar, the biggest difference lies in the different transmission media, the use of radio technology to replace the network cable, can be wired network backup for each other, but unfortunately too slow.
Wireless Internet access
Wi-Fi wireless card is a terminal device, a wireless terminal device connected to the network to access the Internet via Wi-use wireless coverage wireless LAN. Specifically, the wireless card is to make your computer to the Internet can use a wireless device, but also need to have a wireless network card can connect to a wireless network, if you have a wireless router or wireless AP at home or location (AccessPoint Wireless Access point) coverage, you can wirelessly connect to a wireless network through a wireless network card can access.
Wireless card works microwave radio technology, the notebook has WIFI, GPRS, CDMA and other types of wireless data transmission mode to the Internet, the latter two by China Mobile and China Telecom (China Unicom will sell to China Telecom CDMA) to achieve the former Telecom or China Netcom has been involved, but most of the main access to the Internet WIFI own base station (in fact, WIFI router, etc.) and a notebook with a WIFI card. The basic concept is similar to say, for data transmission via wireless format. Follow 802.1q standard for wireless Internet through wireless transmission, wireless access point signals with wireless cards to receive and send data.
Wireless LAN standards:
1. IEEE802.11a: use the 5GHz band, the transmission speed of 54Mbps, is not compatible with 802.11b
2. IEEE 802.11b: use the 2.4GHz band, the transmission speed of 11Mbps
3. IEEE802.11g: use the 2.4GHz band, the transmission speed of 54Mbps, backward compatible with 802.11b
4. IEEE802.11n (Draft 2.0): used on Intel's new Centrino 2 notebooks and high-end routing, backward compatible, the transmission speed 300Mbps.
LC fiber optic interface card meanings:
LC interface origin of the name is based on the definition of fiber optic interface module named. Fiber optic module can be divided according to their interface: SC, LC, ST, FC and other types.
SC interface, due to its ease of operation, has been widely used. In recent years, fiber to the desktop (FTTD) are widely used, making the SC fiber optic interface cards gained popularity.
SC fiber optic interface card meanings:
Fiber NIC interface origin of the name is based on the interface definition SC fiber optic module named. Fiber optic module can be divided according to their interface: SC, LC, ST, FC, MTRJ other types. Due to the convenience of SC fiber interface operation, allowing the card SC interface with optical modules, Widely used, and often been instituted, as also the birth: SC fiber optic interface cards this term.
Fiber ports operating wavelength and transmission distance: Operating wavelength optical interface of network media working distance
SC / APC single fiber, single-mode wavelength 1310 / 1550nm 10 / 20KM
SC / PC dual-fiber, single-mode wavelength 1310nm 10/20 / 40KM
SC / PC dual-fiber, multimode wavelengths 850nm 550M
SFP fiber network card meanings: SFP is (Small Form-factor Pluggables) can be simply understood as GBIC upgrade Version.
SFP module (GBIC module volume ratio reduced by half, you can configure more than double the number of ports on the same panel. Since the SFP module functionally consistent with GBIC, therefore, also be some switch vendors called miniaturization GBIC (Mini -GBIC).
SFP fiber network card, named Incredibles, is a small, heat-dial fiber network card insert module. Integrated SFP slots in the card, the user can according to actual needs, insert multimode or single-mode SFP optical module, and can be based on the actual transmission distance, insert the optical module of different traditions distance; it does not need to card itself. This gives the user a lot of options.
Follow are some Network Drivers:
intel 6235/6300/6250/6205/6200 wifi driver This package provides the driver for the Intel 6235/6300/6250/6205/6200 WiFi and is supported on the Precision and Latitude models that are running the following Windows Operating Systems: Windows 7/8 32-bit.
R292488.exe is Dell Wireless 1701 802.11 b/g/n, Wireless WLAN 1503 Half Mini-Card, The version is 5.100.82.15.
r276178.exe is Intel Intel (R) WiFi Link 6250, v.TRWFW1318D, A04 Customer Install release for Intel(R) Module 6250 WiFi on Win7 32 bit.
dell wireless 1501/1503/1701 half mini card driver This package provides the Dell Wireless 1501/1503/1701 Half Mini Card Driver and is supported on Inspiron N4050/M4040/N5040/N5050/M5040 and Vostro Notebook 1440/1450/1540/1550 that are running the following Windows Operating Systems: Vista and Windows 7.
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