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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.

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 10Mbps

(traditional Ethernet), 100Mbps (Fast Ethernet), and

1,000Mbps (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.

Fast Ethernet

Fast Ethernet, also called 100BASE-T, operates at 10 or

100Mbps per second over UTP, STP, or fiber-optic media.