Fiber optic cabling consists of center glass core surrounded by several layers of protective materials. It transmits light rather than electronic signals eliminating the problem of electical interference. This makes it ideal for certain environments that contain a large amount of electrical interference. It has also made it the standard for connecting networks between buildings, due to its immunity to the effects of moisture and lighting. Fiber optic cable has the ability to transmit signals over much longer distances than coaxial and twisted pair. It also has the capability to carry information at vastly greater speeds. This capacity broadens communication possibilities to include services such as video conferencing and interactive services. The cost of fibes optic cabling is comparable to copper cabling; however, it is more difficult to install and modify. 10 BaseF refers to the specifications for fiber optic cable carryin Ethernet signals.
The standard connector for unshielded twisted pair cabling is an RJ-45 connector. This is a plastic connector that looks like a large telephone-style connector. A slot allows the RJ-45 to be inserted only one way. RJ stands for Registered Jack, implying that the connector follows a standard borrowed from the telephone industry. This standard designated which wire goes with each pin inside the connector.
Cable is the medium through which information usually moves from one network device to another. There are several types of cable which are commonly used with LANs. In some cases, a network will utilize only one type of cable, other networks will use a variety of cable types. The type of cable chosen for a network is related to the network's topology, protocol, and size. Understanding the characteristics of different types of cable and how they relate to other aspects of a network is necessary for the development of a successful network.
Commonly knowns as "Function Keys", F1 through F12 may have variety of different uses or no use at all. Depending on the installed operating system and the software program currently open will change how each of these keys operate. A program is capable of not only using each of the function keys but also combining the function keys with the ALT or CTRL key, for example, microsoft windows users can press ALT+F4 to close the program is currently active.