Details Title: Cables and Connectors Description: Cables and Connectors Total Flash Cards: 32 Created: 04/05/2008 05:20:18		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Computer Science Flashcards
Cards in this set: Term Why is coaxial cable not used for ring or star topologies? Definition The ends of the cable must be terminated. Term What are the components of a coaxial cable? Definition -Two concentric metalic conductors (inner conductor caries data, mesh grounds the cable). - The insulator seperates inner conductor from the mesh ground. - PVC sheath, cable encasement. Term What are the advantages of coaxial cable? Definition -Highly resistant to EMI. -Highly resistant to physical damage. Term What are the disadvantages of coaxial cable? Definition Expensive, inflexible construction, unsupported by new standards. Term What are the four coaxial grades? Their purpose? Their rating resistance? Definition RG-58 (10base2 Ethernet, thinnet--50ohms), RG-59 (Cable TV/Networking-75ohms), RG-6 (Satellite TV--75ohms, RG-8 (10base5 Ethernet, thicknet--50ohms), Term What are the three types of coaxial cable connectors? Definition -F-Type (screw-on) -BNC (push and twist) -AUI (DB15) Term What are the three components of Fiber Optic Cable? Definition Sheath, Cladding, Core Term What are the advantages of Fiber Optics? Definition -Immune to EMI because it does not use electricity. -Resists ease dropping. -Supports very high data rates. -Allows for greater cable distances. Term What are the disadvantages of Fiber Optics? Definition -Expensive. -Difficult to work with. -Hard to install. Term What are the types of fiber optic cable? Definition Single mode (single ray of light) Multi mode Term What is the diameter of single mode fiber? What are the advantages? Definition -10 microns. -Data can be transmitted long distances (kilo meters). Term What is the diameter of multi mode fiber? Describe its function? Definition -50-100 microns (Multi ray transmission at different frequencies, cable lengths are limited). Term What does the cladding do in multimode fiber transmission? Definition It is created to reflect the rays at different angles to allow for multiple frequencies to be transmitted without interfearing with one another. Term Types of fiber connectors? Definition -ST (SM & MM) -SC (SM & MM) -LC (SM & MM) plastic connector with locking mechanisim. -MT RJ (SM & MM) plastic connector with uses tabs to ensure plug is aligned. Term IEEE1394 is what cable specification Definition Firewire Term Can you connect two computers though a USB port? Definition Yes Term How many versions of USB are there and what are their speeds? Definition -2 -USB1.0 12mbps -USB2.0 480mbps Term What is a mini-USB connector used for? Definition Digital camera Term What platform uses IEEE1394 for standard use? Definition Mac Term What are the two types of firewire ports? What is their speeds? Definition -4 wire (used for digital cameras) -6 wire (used to connect PCs) - 400mbps Term Describe the USB A type connector. Definition -Plugs directly into computer or hub. -Will connect two computers directly. Term Describe the USB B type connector. Definition -Generaly plugs into a hub, printer, or other periphreal device to the computer. -Most USB cables have an A connector on one end and a B connector on the other. Term Describe the mini-USB type connector. Definition -Designed to plug into devices with mini plugs (digital cameras) -Most mini-USB cables will have an A connector on the other side to plug into the PC Term What is a transiever do? Definition Modern NICs have a transiever built in. They convert digital data to a physical signal Term Describe a MAC address. Definition -Burned into ROM of every network device -IEEE assignes vendors a 48 bit value -Represented as a 12 digit HEX number Term Hexidecimal numbers are Base __ numbers Definition base 16 Term Identify valid MAC addresses: 00-09-5B-36-C2-93 00-039-5B-3H-C2-93 00B0.D006.BCAC 0F-09-5B-56-C2-99 Definition 00-09-5B-36-C2-93 0F-09-5B-56-C2-99 00B0.D006.BCAC Term What does ISDN stand for? Definition Intergrated Services Digital Network Term ISDN uses what type of cabling? Where is it frequently used? Definition -Twisted pair copper wiring. -Used mostly in europe Term Describe how a NIC sends data across the network. Definition 1. NIC RXs PCs data 2. NIC breaks data into frames and includes: -Sending NICs MAC -Recieving NICs MAC -Data -CRC check 3.NIC encodes the frames for transmission 4.Recieving NIC verifies NIC addresses and CRC. 5.Receiving NIC tracks frames and reassembles. 6. Receiving NIC sends data to PC Term How is ISDN different from dial up technology? Definition ISDN sends digital signals over a digital network, as opposed to analog. Term WAPs use what to transmit data? Definition Radio waves