- 57 -
E
Enterprise
network
An enterprise network consists of collections of
networks connected to each other over a
geographically dispersed area. The enterprise network
serves the needs of a widely 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.
