Question

Exit Exam: Data Communications and Computer Networks (CSCI 3150) The layer of the OSI model makes sure the data received at the very end of a transmission is exactly the same as the data originally transmitted. a. application c. transport d. network access b. session between some 62. are represented as continuous waveforms that can be at an infinite number of points given minimum and maximum. a. Analog signals c. Digital data d. Digital pulses b. Digital signals 63. The three basic components of analog and digital signals are: amplitude, frequency, and cycles baud hertz phase b. d. 64. Three important data codes are EBCDIC, , and Unicode. NRZ-L 4B/SB a. ASCII NRZi b. d. 65. is the designation for a digital telephone circuit that transmits voice or data at 1.544 Mbps. ISDN b. c.VSAT d. T-32 66. The bandwidth for a data transmission line that can transmit within a frequency range of 100 Hz to 4000 Hz a. 3900 Hz 4100 Hz 4200 Hz b. 4000 Hz d. 67. A system transmits 10-Mbps baseband (digital) signals over twisted pair for a maximum of 100 meters per segment length a. Base5 b. 10Broad36 10BaseT d. 100BaseTX 68. Aprotocol is a protocol in which each workstation takes a turn at transmission, and the turns are uniformly distributed over all workstations. a. CSMA/CD c. CSMA/CA d. CSMA/CT b. round-robin 69. What is the data transfer rate in bps of a signal that is encoded using phase modulation with 64 different phase angles and a baud rate of 1000? a. 64,000 bps b. 32,000 bps c. 8,000 bps d. 5,000 bps 70. The Internet is an example of a a. Local area network b. Satellite area network d. personal area network c. wide area network 71. A can interconnect multiple workstations (like a hub) but can also filter out frames, thereby providing a segmentation of the network (like a bridge). switch router satellite repeater b. d.

Answer 1

Answer 61: Transport layer is responsible for error detection, correction, traffic control, session multiplexing Answer 62: Analog Signal are represented by continuous waveforms, which can be at an infinite number of points between some given minimum and maximum. Answer 63: a Basic.companenteanaleg anddigital signalare frequency, phase, and amplitude. Answer 64: Three important data codes are EBCDIC, ASCI, and Unicode.