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IP Wireless Security Motorized Camera
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messages to each other over media. They represent the sender and receivers.
The data they send is the message. The cabling or transmission method they
use is the medium.
Connection
In networking, two devices establish a connection to communicate with each
other.
D
DHCP
Dynamic Host Configuration Protocol was developed by Microsoft a protocol
for
assigning dynamic IP addresses to devices on a network. With dynamic
addressing, a device can have a different IP address every time it connects to
the network. In some systems, the device's IP address can even change while it
is still connected. DHCP also supports a mix of static and dynamic IP
addresses. This simplifies the task for network administrators because 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
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