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Ethernet The most popular LAN communication technolo
.
There are a variet
of t
pes of Ethernet, includin
10
Mbps (traditional Ethernet), 100 Mbps (Fast Ethernet),
and 1,000 Mbps (Gi
abit Ethernet). Most Ethernet
networks use Cate
or
5 cablin
to carr
information,
in the form of electrical si
nals, between devices.
Ethernet is an implementation of CSMA/CD that
operates in a bus or star topology.
F
Fast Ethernet Fast Ethernet, also called 100BASE-T, operates at 10
or 100Mbps per second over UTP, STP, or fiber-optic
media.
Firewall Firewall is considered the first line of defense in
protecting private information. For better securit
, data
can be encr
pted. A s
stem desi
ned to prevent
unauthorized access to or from a private network.
Firewalls are frequentl
used to prevent unauthorized
Internet users from accessin
private networks
connected to the Internet, especiall
Intranets all
messa
es enterin
or leavin
the intranet pass throu
h
the firewall, which examines each messa
e and blocks
those that do not meet the s
ecified securit
criteria.
G
Gateway A
atewa
links computers that use different data
formats together.
Group Groups consist of several user machines that have
similar characteristics such as bein
in the same
department.
