CompTIA’s Network+ certification Study Guide part 10 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. | 76 CHAPTER 2 Network Media provides such a connection between a cable and a device. Because the media used on a network can differ a number of different connectors have been developed over the years. Twisted-Pair and Coaxial Cable Connectors Several types of connectors are available for coaxial cable. Depending on the need connectors that connect to different cable and devices are available for twisted-pair and coaxial. These include D connectors RJ connectors DIX connectors BNC connectors F-Type connectors D Connectors The D connector gets its name from its shape. As shown in Figure with some imagination the D connector can be seen as looking like a letter D turned on its side. A male connector is one that has pins protruding from it while a female connector has holes into which the pins fit. The number of pins used in a D connector varies but always correspond to the number used in the D connector s name. These include DB9 which has nine pins. DB15 which has 15 pins and we ll discuss further in this chapter when we examine DIX connectors. DB25 which has 25 pins. RJ Connectors RJ connectors are used with twisted-pair cabling and can be used to provide connectivity to a cable used by telephone and data devices. Because they are used for different purposes there are several different variations of RJ connectors available. FIGURE DB15 Connector. RJ-11 RJ-11 connectors are used on twistedpair cables that are used by telephones. You can easily find an RJ-11 connector in your home by looking at the ends of the cable running from Connectors 77 your phone into the wall jack. They are also used to plug dial-up modems into the phone line so that computers can dial into the Internet or access networks remotely using the phone line. They are primarily used in North America and are not widely used in other countries throughout the world. RJ-11 connectors have four pins to support four of the wires in a twistedpair cable. Although the connector can be used with .
