diverting element. The beam diverting element is positioned in the path of the beam‚ intercepting the beam and redirecting it. The beam emerges from the transmitter as a non-vertical beam that is raised and lowered. The diverting element may include a pair of mirrors configured as pentagrams‚
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COMPUTER Q1- a ________ is approximately a million bytes. a) Gigabytes b) Kilobytes c) Megabyte d) Terabyte e) None of these Q2- The programs which are as permanent as hardware and stored in ROM is known as- a) Hardware b) Software c) Firmware d) ROMware e) None of these Q3- Memory is made up of a) Set of wires b) Set of circuits c) Large number of cells d) Set of optical fiber e) All of these Q4- Primary memory stores a) Data
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1. Name the common cable types used today a. Utp b. Stp c. Fiber optic d. plenum 2. What unit of measurement is a tenfold logarithmic ratio of power output to power input? a. Decibel 3. Name 3 things that can contribute to attenuation. a. Conductor Resistance‚ b. Mutual Capactitance‚ c. Impedence. d. other 4. Name 3 things that can contribute to attenuation. a. Conductor Resistance‚ Mutual Capactitance‚ Impedence. 5. Name 3 types of crosstalk. a. Near end cross talk‚ Far end Cross Talk‚ Equal
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4. The Medium Access Sub Layer Broadcast channels [or multi-access channels] are a category of networks and the key issue is how to determine who gets to use the channel when there is competition for it. The protocols which define these factors belong to a sub layer of data link layer called the MAC(medium access control)sub layer. ALOHA: Norman Abramson devised a new and elegant method to solve the channel allocation problem called the “ALOHA” system which used ground-based Radio broad
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stuff. Objective 3.01 The Bus Topology and Ethernet I f you can imagine your laundry hanging on a long‚ straight clothes line‚ you have a pretty good idea of how a bus topology network is constructed. Everything hangs off one long run of cable‚ as shown in Figure 3-1. The bus topology has been associated with one network standard in particular—Ethernet. Ethernet Overview Ethernet‚ introduced by Xerox in 1973‚ remained a largely proprietary technology until 1979‚ when Xerox looked for
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media? What are the types of transmission media? Describe bound transmission media. Describe unbound transmission media. Bound Transmission Media Explain twisted pair cable. Explain Co-axial cable. Explain Fiber-Optics cable. 1 1 1 1 1 1 1 4 5 Match the following types of connectors with the cables to which they are used. 7 Compare BNC with UTP Cables Unbound Transmission Media Explain Radio Wave. What is Microwave? List the Advantages of microwaves. What are the Disadvantages of Microwaves? Describe
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Approval Sheet The study entitled Computer Shop networking system prepared and submitted by _________________________ in partial fulfillment of the requirements of Computer Science Course is hereby approved and accepted. Prof. Jonathan Pagurayan Adviser Case Study in Data Communication Prepared By: Roel Angelo D. Sobrevilla and Mark Anthony V. Baccay Introduction Computer shop business is one of the most in demand businesses here in Mandaluyong.Nowadays
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1. A device that acts as a connection point between computers and that can filter and forward data to a specified destination is called a (Points : 1) hub. switch.A router. NIC. | 2. Which device sends data packets to all connected devices in a network? (Points : 1) Network interface card Hub.A Router None of the above | 3. The method of slicing digital messages into parcels‚ transmitting them along different communication
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characteristics of LANs‚ in contrast to wide area networks (WANs)‚ include their smaller geographic area‚ and non-inclusion of leased telecommunication lines. ARCNET‚ Token Ring and other technology standards have been used in the past‚ but Ethernet over twisted pair cabling‚ and Wi-Fi are the two most common technologies currently used to build LANs. The increasing demand and use of computers in universities and research labs in the late 1960s generated the need to provide high-speed interconnections between
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(Bloom‚ 1998). Bus An Ethernet cable usually connects Bus topologies. A bus topology connects your workstations along an open cable length or backbone. If a problem occurs on the backbone‚ the entire network will go down. Troubleshooting can be difficult‚ and because data is sent one packet at a time‚ adding users to the network will slow it down. (Bloom‚ 1998). Bus topologies are relatively easy to install. Star Ethernet cables or Unshielded Twisted Pair (UTP) cables usually connects Star topologies
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