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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
Intranet This is a private network, inside an organization or company, that
uses the same software you will find on the public Internet. The
only difference is that an Intranet is used for internal usage only.
Internet The Internet is a globally linked system of computers that are
logically connected based on the Internet Protocol (IP). The
Internet provides different ways to access private and public