Naeem

Saturday, May 2, 2009

CSU/DSU


A Network Interface Card (NIC) is a device which plugs into a computer and adapts the network interface to the appropriate standard. NICs come in all sort of adapter types: ISA, PCI, PCMCIA, USB, and more. The NIC is a physical card which provides a connection for the physical network. The NIC operates in the Data Link layer of the OSI model.

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