Description : Which of the following is not a transmission medium? a. telephone lines b. coaxial cables c. modem d. microwave systems
Last Answer : microwave systems
Description : Computers cannot communicate with each other directly over telephone lines because they usedigitalpulses whereas telephone lines useanalog sound frequencies. What is the name of the device which permits digital to analog ... A. Interface B. Modem C. Attenuation D. Teleprocessor E. None of the above
Last Answer : Modem
Description : Which transmission mode is used for data communication along telephone lines? (A) Parallel (B) Serial (C) Synchronous (D) Asynchronous
Last Answer : (B) Serial
Description : The device that converts computer output for transmission over telephone lines is called (1) interface (2) interpreter (3) modem (4) I/O port
Last Answer : modem
Description : The channel in the data communication model can be a. postal mail services b. telephone lines c. radio lines d. any of the above
Last Answer : any of the above
Description : An example of an analog communication method is a. laser beam b. microwave c. voice grade telephone line d. all of the above
Last Answer : all of the above
Description : An example of ananalog communication method is A. laser beam B. microwave C. voice grade telephone line D. All of theabove E. None of the above
Last Answer : All of theabove
Description : Which of the following statement is incorrect? a. The difference between synchronous and asynchronous transmission is the clocking derived from the data in synchronous transmission. b. Half ... in online activities d. Batch processing is the prefered processing mode for telecommunication operation.
Last Answer : Batch processing is the prefered processing mode for telecommunication operation.
Description : How many 8-bit characters can be transmitted per second over a 9600 baud serial communication link using asynchronous mode of transmission with one start bit, eight data bits, two stop bits, and one parity bit ? a. 600 b. 800 c. 876 d. 1200
Last Answer : b. 800
Description : A transmission mode that can transmit data in both the directions but transmits in only one direction at a time. a) simplex b) half duplex c) full duplex d) semi-duplex
Last Answer : b) half duplex
Description : Telephone networks operate in this mode. a) simplex b) half duplex c) full duplex d) semi-duplex
Last Answer : c) full duplex
Description : Determine from the following the basic mode of transmission system in the public data network in which data are transferred from the source to the network and from the network to the destination in the frame format. A. Voice mode B. Asynchronous mode C. Synchronous mode D. Packet mode
Last Answer : D. Packet mode
Description : Which of the following is not an input device? a. OCR b. Optical scanners c. Voice recognition device d. COM (Computer Output to Microfilm)
Last Answer : COM (Computer Output to Microfilm)
Description : The interactive transmission of data within a time sharing system may be best suited to a. simplex lines b. half-duplex lines c. full duplex lines d. biflex-lines
Last Answer : half-duplex lines
Description : Which of the following technique isused for encapsulation? A. a technique used inbest-effort delivery systems toavoid endlessly loopingpackets. B. a technique used by protocols in which a lower level ... network that cannothandle the originaldatagram size D. All of theabove E. None of the above
Last Answer : a technique used by protocols in which a lower level protocol accepts a message from ahigher level protocol and places it in the data portion of the low level frame
Description : Which of the following technique isused for fragment? A. a technique used inbest-effort delivery systems toavoid endlessly loopingpackets B. a technique used by protocols in which a lower level protocol ... network that cannothandle the originaldatagram size D. All of theabove E. None of the above
Last Answer : one of the pieces that results when an IP gateway divides an IP datagram into smallerpieces for transmission acrossa network that cannothandle the originaldatagram size
Description : In a telephone system, the customer’s telephone directory numbering is from 000 to 999, what is the capacity of the system? A. 1000 lines B. 100,000 lines C. 10,000 lines D. 100 lines
Last Answer : A. 1000 lines
Description : The pieceof hardware that converts your computer'sdigital signal to ananalog signal that cantravel over telephone lines is called (A) red wire (B) blue cord (C) tower (D) modem (E) None of these
Description : ………………...is a minimal protocol that allows isolated hosts to link via TCP/IP over the telephone network and ………………..uses a proposed international standard for transmitting HDLC over asynchronous lines. A. LCP, PPP B. PPP, LCP C. SLIP, PPP D. PPP, SLIP
Last Answer : C. SLIP, PPP
Description : ______technology is a set of technologies develpoed by the telephone companies to provide highdata ratetransmission. A) ASL B) DSL C) LDS D) none of the above
Last Answer : DSL
Description : How many bytes of data can be sent in 15 seconds over a serial link with baud rate of 9600 in asynchronous mode with odd parity and two stop bits in the frame? a. 10,000 bytes b. 12,000 bytes c. 15,000 bytes d. 27,000 bytes
Last Answer : b. 12,000 bytes
Description : An output device that uses words or messages recorded on a magnetic medium to produce audio response is b. Magnetic tape c. Voice response unit d. Voice recognition unit e. Voice band
Last Answer : Voice response unit
Description : In a topology, if there are n devices in a network, each device has n-1 ports for cables. A) Mesh B) Star C) Bus D) Ring
Last Answer : A) Mesh
Description : Which of the following statements is correct for the use of packet switching? A. the subdivision of information into individuallyaddressed packets in conjunction with alternativerouting arrangementenabled the transmission path ... capacity could be achieved. D. All of theabove E. None of the above
Description : A distributed network configurationin which all data/information pass througha central computer is A. bus network B. star network C. ring network D. Point-to-point network E. None of the above
Last Answer : star network
Description : Which of the following is not a transmission medium? (a) Telephone lines (b) Co_axial cable (c) Modem (d) Microwave system -Technology
Last Answer : (c) All are communication channel but modem is a dev that convert analog signals to digital signals or vice-versa
Description : Transmission of printed material over telephone lines. A. Video text B. Facsimile C. Encoding D. Xerox copy
Last Answer : B. Facsimile
Description : It involves converting standard logic levels to a form more suitable to telephone transmission lines
Last Answer : igital line encoding
Description : Which of the following is an advantage to using fiber optics data transmission? a. resistance to data theft b. fast data transmission rate c. low noise level d. all of above
Last Answer : fast data transmission rate
Description : Inasynchronous transmission, the gap time between bytes is _______. A) fixed B) variable C) afunctionof the data rate D) zero
Last Answer : variable
Description : Which of the following is not a disadvantage of wireless LAN? A. Slower data transmission B. higher error rate C. interference of transmissions from different computers D. All of theabove
Description : In most Wide Area Networks, the subnet consists of two distinct components: which are they? A. Transmission Lines and Switching Elements. B. host and subnet C. Transmission Lines and host D. subnet and Switching Elements.
Last Answer : A. Transmission Lines and Switching Elements.
Description : Transmission Lines are also called as…………………. A. circuits B. channels C. trunks D. circuits channels, or trunks
Last Answer : D. circuits channels, or trunks
Description : A device is sending out data at the rate of 2000 bps. How long does it take to send a file of 1,00,000 characters ? a. 50 b. 200 c. 400 d. 800
Last Answer : c. 400
Description : It is proposed network designed by major telephone companies in conjunction with the ITU-T with the intent of providing worldwide telecommunications support for voice, data, video and facsimile information within the same networ
Last Answer : ISDN
Description : Which of the following device is used to connect two systems, especially if the systems use differentprotocols? A. hub B. bridge C. gateway D. repeater E. None of the above
Last Answer : gateway
Description : A 1000 × 1000 bus admittance matrix for an electric power system has 8000 non-zero elements. The minimum number of branches (transmission lines and transformers) in this system are _____ (up to 2 decimal places)
Last Answer : Ans: 3500.00
Description : In a 4 bus,4×4 Y bus matrix the number of non zero elements are 12. Find the number of transmission lines? a) 8 b) 4 c) 2 d) 5
Last Answer : b) 4
Description : A 4 bus power system consists of 4 transmission lines, then find the sparsity of Y bus matrix? a) 0.75 b) 0.25 c) 0.4 d) 0.5
Last Answer : b) 0.25
Description : If sparsity of a 5 bus transmission line is 0.4. Find the number of transmission lines? a) 6 b) 5 c) 4 d) 3
Last Answer : b) 5
Description : If a 5-bus test system contains 6 transmission lines and one transformer, how many non-zero elements are there in the system Y-bus ? (A) 25 (B) 12 (C) 11 (D) 19
Last Answer : If a 5-bus test system contains 6 transmission lines and one transformer, 19 non-zero elements are there in the system Y-bus.
Description : DTP computer abbreviation usually means ? DeskTop Publishing Data Type Programming Digital Transmission Protocol None Of above
Last Answer : Data Type Programming
Description : What kind of transmission medium is most appropriate to carry data in a computer network that is exposed to electrical interferences? a) Unshielded twisted pair b) Optical fiber c) Coaxial cable d) Microwave
Last Answer : b) Optical fiber
Description : The CPU of a system having 1 MIPS execution rate needs 4 machine cycles on an average for executing an instruction. The fifty percent of the cycles use memory bus. A memory read/write employs one machine cycle. For ... (A) 500 Kbytes/sec (B) 2.2 Mbytes/sec (C) 125 Kbytes/sec (D) 250 Kbytes/sec
Last Answer : (D) 250 Kbytes/sec
Description : Which of the following types of channels moves data relatively slowly? a. wide band channel b. voice band challen c. narrow band channel
Last Answer : narrow band channel
Description : The largest portionof the bandwidth for ADSLcarries_______. A) voice communication B) upstream data C) downstream data D) control data
Last Answer : downstream data
Description : ______ cable is used for voice and data communications. A) Coaxial B) Fiber-optic C) Twisted-pair D) none of the above
Last Answer : Twisted-pair
Description : Which of the following types of channels moves data relatively slowly? A. widebandchannel B. voice band channel C. narrowband channel D. broadbandchannel E. None of the above
Last Answer : narrowband channel
Description : ……….cable is used for voice and data communications. a. Twisted-pair b. None of These c. Coaxial d. Fiber-optic
Last Answer : a. Twisted-pair