What network card is good? Can you elaborate on that

Network card: The connection between the computer and the external LAN is through the insertion of a network interface board in the main chassis (or a PCMCIA card in the laptop).

A network card is a network component that works at the data link layer, and is an interface that connects computers and transmission media in a local area network.

It's a mystery! Let me tell you, the network card is used to surf the Internet, and you can't access the Internet without it. With it, you won't necessarily be able to access the internet. But if you don't have it, you can't get on it.

It's something you have to install if you want to go online, a chip-like thing, which generally comes with it.

The network card is used to access the Internet, and the computer motherboard produced in recent years has all integrated the network card, so there are few ordinary independent network card applications, and the second-hand market is all ten yuan each.

It's that you don't need to buy it to access the Internet without a network cable, but it consumes data, and traffic is proportional to ...... cash

The board in your case for surfing the Internet = =

The network card is used for surfing the Internet, with which you can take your laptop and surf the Internet on the road.

Wireless network card, Internet access without cable.

A network card, also known as a network adapter, is used to connect to the network, it is just a device that sends and receives signals. Different networks require different NICs.

The network card is something inside the computer, it is responsible for the Internet access of the computer, just like the human mouth is responsible for eating, generally with the computer has a network card, most of them are integrated, a very small part is independent, that is, the long rectangular mouth behind the computer, there is this mouth, indicating that your machine has the most basic Internet access conditions, and then call a ** to your local Netcom or telecommunications business hall, let them install a network cable, that is, install a**, open a broadband Internet service, if there is a ** directly open an Internet service at home).

Call them salesman, install it for you, debug it, **aspect, install ** generally do not need money, to about 50, will point to the money of the ** line network fee is generally 500 to 720 a year, in addition to rent a set of equipment, including a signal splitter, a modem (cat), a few network cables or ** lines, and a power supply on the cat (rent-free, but the pressure is about 150).

That's it, the first investment with a year's Internet fee is about 800.

You don't have to worry about this thing, generally motherboards have integration.

Usefulness of network cards:

1. Serial parallel conversion.

2. When the computer wants to send an IP datagram, the network card will be handed down by the protocol to the network card to assemble a frame and send it to the local area network.

The role of the network card:

Communication between the NIC and the LAN is carried out in serial mode by cable or twisted pair. The communication between the network card and the computer is carried out in parallel transmission via the IO bus on the computer motherboard. Therefore, an important function of the NIC is to perform serial parallel conversion.

Since the data rate on the network is not the same as the data rate on the computer bus, a memory chip must be installed in the network card to cache the data.

The NIC is not a separate autonomous unit because it does not have a power supply itself, but must use the power of the computer it is plugged into, and is controlled by that computer. Therefore, the network card can be seen as a semi-autonomous unit. When the NIC receives an erroneous frame, it discards the frame without notifying the computer it is inserted into.

When the NIC receives a correct frame, it uses an interrupt to notify the computer and deliver it to the network layer in the protocol stack. When a computer wants to send an IP datagram, it is handed down by the protocol to the network card to assemble a frame and sent to the local area network.

With the continuous improvement of integration, the number of chips on the network card continues to decrease, although there are many kinds of network cards produced by manufacturers, but their functions are similar.

A network card is a piece of computer hardware used to connect your computer to the outside network. I know that there are 8129 and 8139 network cards, and now there is a kind of diskless network card that is generally 8139 network card, which can be used to boot the chip; The 8129 cannot be used on the boot chip, and for private customers, both can generally be used.

One of the key pieces of hardware in a network system is its adapter, commonly known as a network card. In a local area network, the network card plays an important role. The network card is used for the input and output of signals between computers.

The NIC has its own interrupt number (IRQ) and I 0 ditan. Network cards include ISA cards, EISA cards, and Ethernet cards used on Apple Mac machines. At present, 16-bit ISA network cards and 32-bit PCI network cards are widely used.

The network card has buffer memory in order to store data. Similar to sound cards, network cards usually come with their own drivers. When in use, the network card is inserted into the expansion slot of the computer.

There is an indicator light on the network card, which indicates whether it is working properly or not.

The transmission rate supported by the network card is different, some are 10 megabits per second, some are 100 megabits per second, and some can self-adapt to 10 megabits or 100 megabits.

A network card with a remote boot chip that can be used on diskless workstations. Diskless workstations without hard disks or floppy drives. Starting the computer through the network card can ensure the security of the system and avoid viruses. In addition, it is possible to reduce the cost.

In laptops, a smart PCMCIA card is used to exchange data with other computers. In high-speed networks, there are FDDI network cards used in optical fiber data distribution interfaces, and ATM network cards used in different card transmission modes. The network card used for the bus structure topology in the LAN is the network card of the BNC port, and the transmission medium is a section of 50 thin coaxial cables, and the two ends of a network segment need to be sealed with terminators to form a network loop.