What is a Network Interface Card or NIC Adapter?

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NIC stands for Network Interface Card. NIC are also known as network interface cards, network adapter or LAN adapter. A NIC adapter is the most important device in building network. The network adapter card is physically attached to the network cabling. It is responsible for receiving and transmitting data at the physical level.

A NIC adapter transmits data onto the network and receives data from the network. It works at the data link protocol level. A NIC provides an attachment point for a specific type of cable, such as coaxial cable, twisted-pair cable, or fiber-optic cable. NICs for wireless LANs typically have an antenna for communication with a base station. A network adapter has a unique IP address.

Modern network adapter hardware exists in several forms. Besides traditional PCI Ethernet cards, some network adapters are PCMCIA devices or USB devices. Some wireless network adapter gear for laptop computers are integrated circuit chips pre-installed inside the computer.

There are four techniques used for transfer of data a NIC may use one or more of these techniques.

  1. Polling is where the CPU examines the status of the peripheral under program control.
  2. Programmed I/O is where the microprocessor alerts the designated peripheral by applying its address to the system’s address bus.
  3. Interrupt-driven I/O is where the peripheral alerts the microprocessor that it is ready to transfer data.
  4. DMA or Direct Memory Access is when a controller takes charge of the system bus and transfers data from the NIC to a memory location, thus reducing CPU load.

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What is a Network Card?

A network card also called Ethernet card, Network Adapter, Network Interface Card, or NIC. A network card acts as the interface between a computer and the rest of devices that forms the network.

What types of Ethernet Card there are?

Ethernet cards are also known as network interface cards or network adapters. Ethernet cards are available in several forms:
ISA cards were the first standard for PCs, requiring users to open their computer case for installation

What is the function of a Network Card?

The primary function of a network interface card is to provide a physical link to a computer network. A network card is the physical interface between the computer and the network cable.

How to Enable or Disable a Network Adapter?

Network adapters can normally be enable or disabled through their software.  When a network connection suddenly stops functioning, disabling and re-enabling it can repair the problem.

How to install a PCMCIA Wireless Network Adapter?

Most laptops have wireless networking built-in. But if you need to install a wireless network adapter, check out the below instructions:
Insert the wireless card into the available PCMCIA slot of the laptop. There is no need to shut down the laptop.

How to install a USB Network Adapter?

A network adapter card is required to connect a computer to a network or Internet. Most computers have wireless networking built-in. Older computers may need to have a network adapter added to them before using them on a network. USB Network adapters can come in different models.

How to install a PCI Wireless Network Card?

A PCI wireless adapter card connects to a desktop computer’s PCI bus contained inside the computer:
Turn off the computer and unplugged it.

How to install an Internal PCI Network Adapter?

Some old desk computers may need a network adapter added to them before be able to access a network. To install and Internal Network Adapter follow the below steps:
Ensure the computer is powered down and unplugged.

How verify if a Network Adapter is working properly?

First of all if a Network Adapter has been installed and set up properly in a computer, this will have Internet access. For computers running Windows open the Windows Device Manager.

How to know if a Network Adapter is installed in my computer?

You may determine whether a computer already possesses a network adapter looking for an RJ-45 jack on the back of the computer. The RJ-45 jack appears similar to a phone line jack but is slightly larger.

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