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 : 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 : 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 : The types of Unguided transmission channel or media used for LAN are __. A. Twisted Pair Cables B. Coaxial Cables C. Radio Waves D. All the above
Last Answer : C. Radio Waves
Description : Identify the non suitable medium for 802.3 ethernet? a. A thin coaxial cable b. A twisted pair cable c. A microwave link d. A fiber optical cable
Last Answer : c. A microwave link
Description : Which of the following cannot be used as a medium for 802.3 ethernet? a) A thin coaxial cable b) A twisted pair cable c) A microwave link d) A fiber optical cable
Last Answer : c) A microwave link
Description : Which of the following is avoice bandchannel? A. Telephoneline B. Telegraphline C. Coaxial cable D. Microwave systems E. None of the above
Last Answer : Telephoneline
Description : Which of the following transmission systems provide the highest data rate to in individual device? a. computer bus b. telephone lines c. voice and mode d. lease lines
Last Answer : computer bus
Description : This is a global collection of high-powered computer that are connected together with cables, telephone lines, microwave dishes, satellites etc. A) Arpanet B) Internet C) Network
Last Answer : B) Internet
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
Last Answer : modem
Description : . Why are coaxial lines more efficient at microwave frequencies than two-wire transmission lines?
Last Answer : The electromagnetic fields are completely confined
Description : The device that converts computer output for transmission over telephone lines is called (1) interface (2) interpreter (3) modem (4) I/O port
Description : Which of the following performs modulation and demodulation? a. fiber optics b. satellite c. coaxial cable d. modem e. none of the above
Description : Which of the following performs modulation and demodulation? a. fiber optics b. satellite c. coaxial cable d. Modem
Last Answer : d. Modem
Description : ______ cables carry data signals in the form of light. A) Coaxial B) Fiber-optic C) Twisted-pair D) none of the above
Last Answer : Fiber-opti
Description : ……cables are composed of a glass or plastic inner core surrounded by cladding,all encased in an outside jacket. a. Fiber-optic b. Coaxial c. Shield Twisted Pair d. Unshield Twisted-pair
Last Answer : a. Fiber-optic
Description : Which of hte following is considered a broad band communication channel? a. coaxial cable b. fiber optics cable c. microwave circuits d. all of above
Last Answer : all of above
Description : Consists of 2 conductors twisted round each other. a. Twisted pair cable b. Fiber optic cable c. Coaxial cable d. Microwave
Last Answer : a. Twisted pair cable
Description : A large numbers of computers in a wide geographical area can be efficiently connected using (A) twisted pair lines (B) coaxial cables (C) Communication satellites (D) all of the above
Last Answer : (D) all of the above
Description : The probability thata singlebit will be inerror on a typical public telephone lineusing 4800 bps modem is 10 to the power -3. If no error detection mechanism is used, the residual error ratefor a communicationline using 9-bit frames is ... to A. 0.003 B. 0.009 C. 0.991 D. 0.999 E. None of the above
Last Answer : 0.009
Description : Which of the following is nota guided medium? A) twisted-pair cable B) coaxial cable C) fiber-optic cable D) atmosphere
Last Answer : atmosphere
Description : Which of the following is not a guided medium? a. twisted-pair cable b. fiber-optic cable c. coaxial cable d. atmosphere
Last Answer : d. atmosphere
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 transmission media provides the highest transmission speed in a network? a. coaxial cable b. twisted pair cable c. optical fiber d. electrical cable
Last Answer : c. optical fiber
Description : Which transmission media provides the highest transmission speed in a network? a) coaxial cable b) twisted pair cable c) optical fiber d) electrical cable
Last Answer : c) optical fiber
Description : The piece of hardware that converts your computers digital signal to an analog signal that can travel over telephone lines is called a: a) Red Wire b) Blue Cord c) Tower d) Modem e) None of These
Last Answer : d) Modem
Description : A modem- 1) Translates along Signals from a computer into digital Signals that can travel along conventional telephone lines 2) Translates digital Signals from a computer into analog Signals that can ... conventional telephone lines 3) Demodulates digital Signals from a computer. 4) None of these
Last Answer : 4) None of these
Description : Different computers are connected to a LAN by a cable and a (1) modem (2) interface card (3) special wires (4) telephone lines
Last Answer : interface card
Description : Which of the following statement is correct? a. terminal section of a synchronous modem contains the scrambler b. receiver section of a synchronous modem contains the scrambler c. transmission section of ... d. control section of a synchronous modem contains the scrambler e. none of the above
Last Answer : transmission section of a synchronous modem contains the scrambler
Description : The physical layer provides __________ a. mechanical specifications of electrical connectors and cables b. electrical specification of transmission line signal level c. specification for IR over optical fiber d. all of the mentioned
Last Answer : d. all of the mentioned
Description : The physical layer provides __________ A. mechanical specifications of electrical connectors and cables B. electrical specification of transmission line signal level C. specification for IR over optical fiber D. all of the mentioned
Last Answer : D. all of the mentioned
Description : The physical layer provides __________ a) mechanical specifications of electrical connectors and cables b) electrical specification of transmission line signal level c) specification for IR over optical fiber d) all of the mentioned
Last Answer : d) all of the mentioned
Description : Coaxial lines are used on those systems operating _______. A. Below 2 GHz B. At 300 MHz C. Above 10KHz D. Above 10GHz
Last Answer : A. Below 2 GHz
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 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 : ………………...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 : Question... does a coaxial cable deliver both TV and internet data at the same time? if i'm using the coaxial cable for watching TV would i able to connect it to a modem get internet from it... If i'm paying for internet service?
Last Answer : Buy a splitter for the coax and do both at the same time. Yes, they both come down at the same time.
Description : The advantage of cables over overhead transmission lines is (a) easy maintenance (b) low cost (c) can be used in congested areas (d) can be used in high voltage circuits
Last Answer : (c) can be used in congested areas
Description : ACSR (Aluminium Conductor Steel Reinforced) are used as (A) over head transmission lines. (B) super conductors. (C) fuse (D) underground cables.
Last Answer : (A) over head transmission lines.
Description : The main limitation for power handling capability of short length transmission lines and cables is (A) power factor (B) stability (C) thermal effect limit (D) conductor size
Last Answer : The main limitation for power handling capability of short length transmission lines and cables is thermal effect limit
Description : What is the typical velocity factor of coaxial cables? A. 0.6 to 0.8 B. 0.3 to 0.5 C. 0.5 to 0.9 D. 0.4 to 0.6
Last Answer : A. 0.6 to 0.8
Description : What material is most often used for the outer covering of coaxial cables? A. PVC B. Teflon C. PE D. Polystyrene
Last Answer : A. PVC
Description : Which of the following cables can transmit data at high speeds- 1) Coaxial Cable 2) Optic fibre Cable 3) Twistedpair Cable 4) UTP Cabl
Last Answer : 2) Optic fibre Cable
Description : Which of the following cables can transmit data at high speeds 1 Coaxial Cable 2 Optic fibre Cable 3 Twistedpair Cable 4 UTP Cable
Last Answer : 2 Optic fibre Cable
Description : What precautions should you take when tying bundles containing coaxial cables?
Last Answer : Do not tie too tightly and use the proper type of tape.
Description : Which of the following is required to communicate between two computers? a. communications software b. protocol c. communication hardware d. all of above including access to transmission medium
Last Answer : all of above including access to transmission medium
Description : In ________,a station monitors the medium after it sends a frame to see if the transmission was successful. If so, the station is finished. If, however, there is a collision, the frameis sentagain. A) CSMA/CA B) CSMA/CD C) either (a)or (b) D) both (a) and (b)
Last Answer : CSMA/CD
Description : ________ is a typeof transmission impairment in which the signal loses strength due to theresistance of the transmission medium. A) Attenuation B) Distortion C) Noise D) Decibel
Last Answer : Attenuation
Description : In ATM, the _____ layer defines thetransmission medium,bit transmission,encoding, and electrical-to-optical transformation. A) physical B) ATM layer C) AAL D) none of the above
Last Answer : physical