L3 computer network

Network devices
workstation
a workstation is a computer intended for individual use that is faster and more capable than a personal computer. it's intended for business or professional use. workstations and applications designed for them are used by small engineering companies.
NIC.
 a Network interface card (NIC) is a computer hardware component that  allows a computer to connect to a network. most new computer have either ethernet capabilities integrated into the motherboard chipset, or use an inexpensive dedicated ethernet chip connected through the PCI Express bus.
Print
the printer features are capabilities that can be controlled by the unidrv. by listing a feature and its characteristics in a GPD file, each printer feature can assigned to one or more state and printer options are used to define the possible states.
the function of a printer is to provide the user with a copy if what is input into the printer via your computer. the multi-function printer, input/output can be in the form of print copy, the copy function comes directly from what is input from your computer.
Mail
a mail server features
Web

Proxy

File

interconnection devices
router, switch, wireless access point

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