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distributed company and operates the company’s mission-
critical applications.
Ethernet The most popular LAN communication technology. There are
a variety of types of Ethernet, including 10Mbps (traditional
Ethernet), 100Mbps (Fast Ethernet), and 1,000Mbps (Gigabit
Ethernet). Most Ethernet networks use Category 5 cabling to
carry information, in the form of electrical signals, 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 security, data can be
encrypted. A system designed to prevent unauthorized access
to or from a private network. Firewalls are frequently used to
prevent unauthorized Internet users from accessing private
networks connected to the Internet, especially Intranets all
messages entering or leaving the intranet pass through the
firewall, which examines each message and blocks those that
do not meet the specified security criteria.
G
Gateway A gateway links computers that use different data formats
together.
Group Groups consist of several user machines that have similar
characteristics such as being in the same department.
H
HEX Short for hexadecimal refers to the base-16 number system,
which consists of 16 unique symbols: the numbers 0 to 9 and
the letters A to F. For example, the decimal number 15 is
represented as F in the hexadecimal numbering system. The
hexadecimal system is useful because it can represent every
byte (8 bits) as two consecutive hexadecimal digits. It is easier
for humans to read hexadecimal numbers than binary