?– The MAC address is burned onto each NIC by the manufacturer, providing a unique,
physical network address that permits the device to participate in the network.
?– The cable and connector speci?¬?cations used to support Ethernet implementations are
derived from the EIA/TIA standards body.
?– The categories of cabling de?¬?ned for the Ethernet are derived from the EIA/TIA-568
(SP2840) Commercial Building Telecommunications Wiring Standards.
?– Several connection media are used for Ethernet with RJ-45 and GBIC being the most
common.
?– A GBIC is a hot-swappable I/O device that plugs into a Gigabit Ethernet port on a
network device to provide a physical interface.
?– UTP cable is a four-pair wire. Each of the eight individual copper wires in UTP cable
is covered by an insulating material, and the wires in each pair are twisted around each
other.
?– A crossover cable connects between similar devices like router to router, PC to PC, or
switch to switch.
?– A straight-through cable connects between dissimilar devices like switch to router or
PC to switch.
Chapter Summary
A network is a connected collection of devices that can communicate with each other.
Networks in homes, small businesses, or large enterprises allow users to share resources
such as data and applications (e-mail, web access, messaging, collaboration, and
databases), peripherals, storage devices, and backup devices.
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