Communication has four components: sender, receiver,
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.
In networking, two devices establish a connection to
communicate with each other.
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.
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.
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.
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