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CompTIA Network+ Certification Study Guide part 7

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CompTIA’s Network+ certification Study Guide part 7 is a globally-recognized, vendor neutral exam that has helped over 235,000 IT professionals reach further and higher in their careers. The 2009 Network+ exam (N10-004) is a major update with more focus on security and wireless aspects of networking. Our new study guide has been updated accordingly with focus on network, systems, and WAN security and complete coverage of today’s wireless networking standards. | 46 CHAPTER 2 Network Media CABLING AND CONNECTORS OVERVIEW The media that carries data makes up the basic infrastructure of a network. If you consider data as a vehicle that moves between two points then cabling and connectors are the highways and interchanges that allow data to access and travel across that network. Connectors attached to the ends of the cables are plugged into or coupled in some way with a network card or other device on your network. In doing so a physical link is created between this device and others on your network. Just as a car uses an on ramp to enter a highway the connector provides an access point for data to move along the cable to its intended destination. The purpose of a cable is to carry data across a network. A network card passes an electronic signal onto a cable and a connector is used to connect the cable to the network card or other device to the cable. The data in the form of an electronic signal is passed through the connector to a wire or fiber in the cable. Just as the wires in your house carry electricity to the lights and wall sockets in each room the cable carries these electronic signals to the computers printers or other network devices meant to receive them. Although local area networks LANs of the past often used one type of cabling many LANs today use a combination of different cable types. This is because different cables will carry the data at varying speeds and distances. Although some cables can carry the data for a hundred meters or so others can span greater distances connecting widely spaced areas. In the same way some cables will allow a network to transfer millions bits data while others can send a thousand times this amount. As we ll see later in this chapter the features of a particular type of cable can vary greatly. Because different types of cabling are available to use it follows that there are also different types of connectors that may be used. The connectors fit on the ends of the cabling and are .