Advice 1: What network adapter and what is it for

The network adapter is the link between the computer and the network. This device can replace the network card if it's not on the computer or if the internal card does not support the required standard.
The network adapter is helpful when the computer's network card not working

What are the network adapters

There are two basic network types: wireless and wired. Network adapters can be used with both types of network. In addition, for wireless networks there is a greater number of network adapters, as these types of networks.

Computer using adapter, you can connect to the network using a cable. For wired networks using a device that represents the USB key with the special port for Ethernet cable. This cable can connect, for example, the router and the adapter.
The adapter may be attached to the software, but most modern operating systems will recognize USB adapter and find the necessary driver.

But most commonly involve a network adapter device for wireless networks. These adapters are popular because of their mobility. They allow the computer to join wireless network nearby.

Wireless network adapter similar in appearance to a memory card or flash drives. It's a small USB device with signal light that indicates charge and willingness to work. When it is connected to the computer it scans the Internet channels local providers and reports software on the computer networks. The computer, in turn, shows these networks to the user. To get a computer connected to the network, just click on its name and enter the password if required. The next time you turn the computer already automatically connects to that network.

In many modern computers wireless network adapters already integrated in the car. They represent the microchips.

Finally, there are network adapters, which is merely software. They simulate the functions of a network card. They are called "virtual network adapters".

Why you need network adapters

Most laptops have a built-in wi-fi card or wireless network card. But sometimes the map does not work. This is especially true in cases when the wireless standards are changing to a new and faster connection Protocol. Then the old cards that support legacy protocols, will not work with a router that supports the new standard.
Buying a new network adapter, you need to pay attention to the Protocol that it supports. It's small and need a lot of device can be found in any store Hi-Tech.

When the internal network card does not support the new standard, an alternative to the network adapter can become a new network card. It is easy enough to replace on a desktop computer. But in the notebooks and laptops to make it much more difficult. In such cases it is convenient to use the network adapter.

Advice 2: What is a network card

Network card (network adapter, network interface card, NIC - Network Interface card) is usually called a specialized computer component, which provides communication and data transmission between multiple computers on your network.
What is a network card
Network cards are divided into:

integrated into the motherboard (mostly in laptops);
- external, requiring connection to a computer.

External network card, in turn, differ in the way they connect to the computer and the bus, which enables the exchange of data between the motherboard and network card. To date, the most widely network card with a connector for twisted pair and wireless.

The main characteristics of the network adapters are:

- bit depth - 8, 16, 32 and even 64 bits;
data bus - ISA, EISA, VL-Bus, PCI;
the controller chip (chip);
- support network environment of the transmission - BNC, RJ45, AUI;
- speed;
- FullDuplex;
- The MAC address.

The interface differences make the difference in the configuration of network cards, though the vast majority of modern devices support the Plug&Play technology.

The generic drivers included with the operating systems, allow you to use all the basic functions of the network adapters of the last generation. The drivers offered by the manufacturer of the network cards differ a great set of features.

Of special note are the cards based on USB technology, enhancing convenience and ease of use. a necessary requirement in this case becomes version support USB 2.0 motherboard of the computer.

Additional arguments for choosing a network card can be:

support adapter technology Boot ROM that provides the ability to boot a computer without hard drive on the network;
- support card Wake On Lan, responsible for the switching function of the computer via the network;
the set of indicators the rear panel of the model chosen card.

Recommended by manufacturers of network cards are Intel and 3Com. Also of note is products CNet, LG, Surecom, Allied Telesyn, At-Link and SMC.

Advice 3: How does the network adapter

Network adapter or network card is an integral part of any computer connected to the network, which provides communication and data transfer with other devices and Internet access. To understand their principle of operation, it is necessary to know the characteristics of the network boards.
How does the network adapter
You will need
  • Computer with Internet connection and a network card.
For identification in the network, each device manufacturer assigns the serial number (MAC address). Network fee, passing network traffic, looking for your MAC address in each data packet. If it finds one, the adapter decodes the packet. Typically the MAC address is written in the following form: 12:34:56:78:90:AV
The bit depth or bandwidth of the card determines the speed of data transmission. There are 8, 16, 32, 64-bit adapters. In stationary computers often use 32-bit adapters, and servers better suited 64 bit. The more bandwidth, the higher the connection speed and data transfer over the network. The following speed settings: 10, 100 and 1000 Mbit/s Normal speed for work and used by most adapters is 100 MB/s. But with the growth of Internet users there is a need in maps 1000 MB/s with the aim of a higher connection. If the provider this speed does not provide, this card won't do any good.
Using this bus information is exchanged between the network card and the motherboard. There are different types of interfaces: ISA, EISA, VL-Bus, PCI, CF. In modern computers mostly used by the PCI interface supports 32 and 64-bit data exchange. To connect the external network card uses a USB to connect laptop CF slot.
If you plan to make the network connection on coaxial cable (is thick and thin Ethernet cable), then this requires a network card with BNC connector. When used for data transmission twisted pair cable use RJ45 connectors. Data two types of connections are used most often.
Most modern network cards are additionally equipped with a ROM chip that provides a number of advantages. This chip provides necessary download computer not from local disk and from the network server, even if you do not have any discs and does not affect the operation of the card.
This mode determines whether the data transmission and reception network card. If in properties of a network connection are written, for example, "100 MB/s Full Duplex", it means that the network card operates at 100 MB/s and can send and receive data simultaneously, in contrast to Half Duplex. But the Full it is necessary that the device with which the connection is made, also supported the regime. In modern computers for the purpose of convenience and cost-effective network adapters integrated into the motherboard, although often used and external. The network cable is installed in the appropriate connector on the network card.
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