Скачать в pdf «Network+»

The final advantage to these devices is their ease and speed of setup.

It would take most network technicians about three hours to add another server to a network. Quantum, however, expresses setup times for its network attached storage devices in minutes and seconds. Basically, all an administrator has to do is plug in the power, plug in the network cable, turn the device on, and set up security and access, and the device will be ready to use.

Physical Topologies

topology is basically a map of a network. The physical topology of a network describes the layout of the cables and workstations and the location of all network components. Often, physical topologies are compared to logical topologies, which define how the information or data flows within the network. The topologies are usually similar. It is important to note, however, that a network can have one type of physical topology and a completely different logical topology. You’ll learn more about this later in this chapter.

The cables or connections in a physical topology are often referred to as network media (or physical media). Choosing how computers will be connected in a company’s network is critical. A wrong decision in the physical topology makes the media difficult to correct, because it is costly and disruptive to change an entire installation once it is in place. The typical organization changes the physical layout and physical media of a network only once about every 10 years, so it is important to choose a configuration that you can live with and that allows for growth.

In the next section, we’ll look at physical media. In this section, we’ll look at the five most common topologies:

Скачать в pdf «Network+»