focused in a directional beam • Design of data transmission system – Concerned with data rate and distance – Bandwidth ∗ Higher bandwidth implies higher data rate – Transmission impairments ∗ Attenuation ∗ Twisted pair has more attenuation than coaxial cable which in turn is not as good as optical fiber – Interference ∗ Can be minimized by proper shielding in guided media – Number of receivers ∗ In a shared link‚ each attachment introduces attenuation and distortion on the line Guided transmission
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conductors are twisted 4. Fiber optic cable – a cable made of optical fibers that can transmit large amounts of information at the speed of light. 5. Dark fiber – Dark fiber or unlit fiber is unused optical fibers available for use in fiber optic communications. 6. Coaxial cable – a transmission medium used for high frequency signals. 7. Plenum – Plenum cable is cable that is laid in the plenum spaces of buildings. 8. Riser – A type of inside cable intended for use in non-plenum vertical
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them. (2) A cable containing multiple pairs of UTP wire. Each wire pair is twisted many times per foot (higher grade UTP cable can have more than 20 twists per foot). The twists serve to cancel out electromagnetic interference that the trans-mission of electrical signal through the pairs generates. An unshielded jacket made of some type of plastic
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Describes cables‚ fire ratings and shielding Unshielded Twisted Pair (UTP) Types of Ethernet and phone cables twisted around each other to decrease interference from EMI. Has no shielding. Shielded Twisted Pair (STP) Same as the UTP cables except it is shielded in a metal sheath around it to stop external interference. Fiber-Optic Cable A cable that uses glass to transmit data using light waves. Dark Fiber Optical fiber that has already been laid but is not currently being used. Coaxial Cable A Cable
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same bus. The star topology is a computer network connected via cables to a central system called a hub or switch there are no direct connections between any of the computers‚ although multiple hubs or switches can be added to increase the number of computers that may be connected to the network. A bus topology is the minimum complex network configuration it creates use of a single transmission medium called a coaxial cable. The star topology consists of shielded twisted pair wire (STP)
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Silaba Mpasu Physical Networking Unit 6 Exercise 1 Connector Installations Twisted-pair cable On a TWISTED PAIR CABLE I chose to install an RJ-45. This is the standard Ethernet connector for most systems used today. I would first measure out the length of cable that I would need. I would then use a wire cutter to cut the length that I need‚ leaving enough room for corrections and to open the wire. I would then use wire strippers to remove a small piece of the outer most jacket. I would then choose
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a type of wiring in which two conductors of a single circuit are twisted together for the purposes of canceling outelectromagnetic interference (EMI) from external sources; for instance‚ electromagnetic radiation from unshielded twisted pair (UTP) cables‚ and crosstalk between neighboring pairs. It was invented by Alexander Graham Bell. Advantages and Disadvantages: Advantages -Twisted pair cabling is a type of wiring where two conductors are twisted together in order to cancel out electromagnetic
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has firstly introduced Power Cable definition classification industry chain etc related information. Then introduced Power Cable manufacturing technology and product specifications‚ And then summary statistics China major Power Cable manufacturers 2009-2013 Power Cable capacity production supply demand shortage and Power Cable selling price cost profit margin and production value‚ and also introduced China 32 manufacturers company basic information‚ 2009-2013 Power Cable capacity production price cost
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Dom ------------------------------------------------------ Jan.19 1. What is a computer network? A computer network consits of a number of computers linked together using special ha`rdware and software to enable them to share computing resources. 2. List four main hardware and three software components on a network. 1. Hardware -Personal computers‚ mainframes‚ printers‚ and navigational control systems. 2. Software - Application software‚ desktop software‚ and networking operating
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Internet connection‚ modem requires a. Telephone Lines b. VGA Cables c. Power Cable d. Data Cable 7. Following is an example of physical Transmission Media a. Data Cable b. Coaxial Cable c. VGA Cable d. Power Cable 8. Twisted Pair cable is also known as a. Coaxial Cable b. Fiber Optic Cable c. Unshielded Twisted Pair d. Data Cable 9. Data travel in Fiber Optic cables in the form of a. Signals b. Waves c. Light d. Air
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