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message, and medium. In networks, devices and
application tasks and processes communicate 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
Developed by Microsoft, DHCP (Dynamic Host
Configuration Protocol) is 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. It 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. 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
An enterprise network consists of collections of networks
connected to each other over a geographically dispersed