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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 numbers.
I