8.a. How does data traffic flow in a linear fiber optic network? A. Linear networks don't use fiber optics B. In two directions C. In one direction D. In either one or two directions, based on configuration
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8.a. How does data traffic flow in a linear fiber optic network?
A. Linear networks don't use fiber optics
B. In two directions
C. In one direction
D. In either one or two directions, based on configuration
8.b. How far can cable links span in the ring portion of an FDDI network?
A. 300 km
B. 20 km
C. 200 km
D. 100 km
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- 10. For a 10 Mbps data link using 12,000-bit frames, and assuming that electrical signals propagate at 2.5 x 108 m/s: a. How long does it take to introduce a single frame onto the link? b. How long does it take for the trailing edge of the frame to travel 1,620 km? c. What is the total transmission time of this frame, from start to finish?Consider building a CSMA/CD network running at 10Mbps over a cable with no repeaters. If the signal speed in the cable is 106 km/sec and minimum frame size is 1500 bytes, then what is the cable length (km)?If the signal at the end of a 6km cable has a power value of 2, if you knew that this cable loses 0.5 dB per km (i.e. -0.5 dB/km), then the power of the signal at the beginning of the cable was ..............
- QUESTION 15 A Television broadcasting service uses a single coaxial cable with a bandwidth of 680 MHz to transmit multiple TV channels to their subscribers. Each TV channel is 6 MHz wide. How many channels can be carried if each channel has to be separated by a 1 MHz guard band?Assume you are working as a Network Engineer for a Telecommunications service provider and your task is to estimate the feasibility of a 20 km link between two buildings with one access point and one client radio. The access point is connected to an antenna with 12 dBi gain, with a transmitting power of 500 mW and a receive sensitivity of -84 dBm. The client is connected to an antenna with 10 dBi gain, with a transmitting power of 16 dBm and a receive sensitivity of -82 dBm. The cables in both systems are short, with a loss of 3 dB at each side at the 900 MHz frequency of operation. What is the link margin? By examining the link margin, comment on the reliability of the link.For data is transmitted over twisted-pair cable, you have these characteristics: A signal's power on the channel is 60 dB, signal attenuation is 2 dB per 100 meters, and average noise power on the cable is 0.15 dB per meter. Answer the following questions: What's the S/N ratio at the end of a 60-meter channel? What's the S/N ratio at the end of a 1.5-kilometer channel? What's the maximum channel length if the receiving device requires at least 25 dB of S/N ratio for reliable operation?
- Part B: What can be the applications of Twisted Pair, Coaxial and Optical Fiber? Is there any advantage of Fiber cable over other mentioned two types?a. Assume your university library has a million books. Calculate the number of bytes of data if all of these books were stored online and accessible through a computer network (to the closest order of magnitude). b. How long does it take to transmit the full library of books if the transmission medium's data rate is 10 Mbps, the original Ethernet's speed? If we have a 1 Gbps connection, how long will it take? (The time it takes to download your whole college library is represented by this number.). For a 10 Mbps Ethernet with 100 stations connected to it has 50 % efficiency. Velocity of propagation is 2.1 x 10 m/sec. Find the ratio of transmission to propagation delay.
- Can yo list all the propagation modes of fiber optical cable. Which mode has the best communication performance?4. Satellite Transmission. Suppose there is a 12 Mbps microwave link between a geostationary satellite and its base station on earth (the distance between the two is 36,000 km). Every minute the satellite takes a digital photo and sends it back to the base station. Assume a propagation speed of 2.5 x 10³ m/sec. a. What is the propagation delay, dprop, of the link (in seconds)? b. What is the bandwidth delay product, R x dprop? c. Let X denote the size of the photo. What is the minimum value of X, in bits, for the microwave link to be continuously transmitting?Shielded twisted-pair (STP) cabling was first made popular by IBM when it introduced Type classification for data cabling. Though to purchase and install than UTP, STP offers some distinct advantages. Shielded twisted-pair (STP) cable can up to 600MHZ. STP has an more currently support applications requiring shield that consists of braided . The shield surrounds the 150-ohm, 22 AWG, two-pair conductors. Each is insulated with a to install than UTP. STP cabling solely material and then each twisted pair is individually shielded. STP cabling is because it provides better EMI protection and potential bandwidth, installers consider using fiber-optic cable instead. conductor copper material bandwidth expensive dielectric inner glass Cheap lower Interference expensive WAN higher outer