ccna question types

ccna question types.Ethernet UTP crossover cables connect two sets of wires in a crossover fashion: pin 1 at one end to pin 3 at the other end, and pin 2 to pin 6 O Use crossover cables when connecting DTE devices to DTE devices or DCE devices to DCE devices. For the following connection types, use a crossover cable (as shown in Figure 3.4).Crossover cables: ----------- Figure 3.4 Crossover connections. Hub to hub. . Switch to switch. . Hub to switch..PC, router, or file server to PC, router, or file server.Exam Points.In Ethernet, use a crossover cable when connecting a DTE to a DTE or a DCE to a DCE, and use a straight-through cable when connecting a DTE to a DCE. a DTE device is a PC, file server, or router; a DCE device is a hub or switch. Ethernet crossover cables connect pin 1 to pin 3 and pin 2 to pin 6.Sometimes the Ethernet NIC jacks provide clues as to which cable to use. If the port is marked with an X and the other ports are not, you should use a straight-through cable; if the ports both have an X or neither has an X, you should use a crossover cable. In some cases, this setting can be modified in software using a command or in hardware via a double in-line (DIP) switch to use the cable type that is on hand.Practical Experience Many vendors' switches and devices support automatic cable type detection. For example, it may be possible to connect two switches using straight-through cables, but for the exam, you must know what is described in the preceding "Exam Essentials" .Fiber optic cables are often used to provide ultra-high speed, ultra-long distance connections, for example, up to 100 Gbit/s and over 10 km with fiber optics, which are out of reach for copper cables. However, fiber optic cables have their drawbacks: they are expensive and difficult to install and troubleshoot.Fiber optic cables are not affected by EMI and RFI, whereas copper cables are. Given the limited transmission distance of copper cables, fiber optics is recommended for establishing connections between buildings in campus networks.