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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 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
information worldwide.
Internet address
To participate in Internet communications and on Internet Protocol-based networks, a node
must have an Internet address that identifies it to the other nodes. All Internet addresses are
IP addresses
IP
Internet Protocol is the standard that describes the layout of the basic unit of information on
the Internet (the
packet
) and also details the numerical addressing format used to route the
information. Your Internet service provider controls the IP address of any device it connects
to the Internet. The IP addresses in your network must conform to IP addressing rules. In
smaller LANs, most people will allow the DHCP function of a router or gateway to assign the
IP addresses on internal networks.
IP address
IP address is a 32-binary digit number that identifies each sender or receiver of information
that is sent in packets across the Internet. For example 80.80.80.69 is an IP address. When you
“call” that number, using any connection methods, you get connected to the computer that
“owns” that IP address.
ISP
ISP (Internet Service Provider) is a company that maintains a network that is linked to the
Internet by way of a dedicated communication line. An ISP offers the use of its dedicated
communication lines to companies or individuals who can’t afford the high monthly cost for
a direct connection.
