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Communication
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.
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 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