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b
ecause the software keeps track of IP addresses rather than
requiring an administrator to manage the task. This means a new
computer can be added to a network without the hassle of
manually assigning it a unique IP address. DHCP allows the
specification for the service provided by a router, gateway, or
other network device that automatically assigns an IP address to
any device that requests one
DNS
Domain Name System is an Internet service that translates domain
names into IP addresses. Since domain names are alphabetic,
they're easier to remember. The Internet however, is really based
on IP addresses every time you use a domain name the DNS will
translate the name into the corresponding IP address. For example,
the domain name www.network_camera.com might translate to
192.167.222.8.
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 10 Mbps (traditional
Ethernet), 100 Mbps (Fast Ethernet), and 1,000 Mbps (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
103
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
IEEE
Institute of Electrical and Electronic Engineers.