Description : ____ is a process-to-process protocol that adds only port addresses, checksum error control, and length information to the data from the upper layer.
Last Answer : UDP
Description : Robot that perform the successive stages of a task according to predetermined, unchanging method is called as A : Fixed Sequence Robot B : Variable sequence robot C : Playback Robot D : Numerical Control robot
Last Answer : A : Fixed Sequence Robot
Description : Data rate at which serial PCM bits are clocked out of the PCM encoder onto the transmission line.
Last Answer : line speed
Description : An FDM hierarchy which is formed by frequency – division multiplexing five groups containing 12 channels each for a combined bandwidth of 240 kHz
Last Answer : Supergroup
Description : Category of data transmission if the binary pulse is maintained for the entire bit time?
Last Answer : Return to zero
Description : An FDM hierarchy which is formed by frequency – division multiplexing 10 super groups together for a combined capacity of 600 voice band message channels.
Last Answer : Mastergroup
Description : he local oscillator and mixer are combined in one device because:
Last Answer : it is cheaper
Description : It is used to encode the minimum amount of speech information necessary to reproduce a perceptible message with a fewer bits that those needed by a conventional encoder/decoder
Last Answer : vocoders
Description : To permit the selection of 1 out of 16 equiprobable events, the number of bits required is
Last Answer : 4
Description : A sender uses the Stop-and-Wait ARQ protocol for reliable transmission of frames. Frames are of size 1000 bytes and the transmission rate at the sender is 80 Kbps (1Kbps = 1000 bits/second). Size of ... is lost, the sender throughput is __________ bytes/second. a. 2500 b. 2000 c. 1500 d. 500
Last Answer : a. 2500
Description : The PCM code for each channel occupies a fixed time slot called:
Last Answer : Epoch
Description : One of the responsibilities of the transport layer protocol is to create a ______ communication.
Last Answer : process to process
Description : ____ is a dynamic mapping protocol in which a physical address is found for a given logical address
Last Answer : ARP
Description : _________ is the protocol suite for the Internet.
Last Answer : TCP/IP
Description : _______ is the cell relay protocol designed by the corresponding Forum and adopted by the ITU-T.
Last Answer : ATM
Description : The time it takes to transmit one TDM frame is called ______
Last Answer : Frame time
Description : The radiation pattern plotted in terms of electric field strength or power density
Last Answer : absolute radiation pattern
Description : The radiation pattern of collinear and a broadside antenna is __
Last Answer : bidirectional
Description : ________ defines how a particular pattern to be interpreted, and what action is to be taken based on that interpretation.
Last Answer : syntax
Description : What travels down a waveguide by reflecting from the side walls in a zigzag pattern?
Last Answer : wavefronts
Description : A 8-Mbps tokenring has atoken holding timer value of 10 msec. What is the longest frame (assumeheader bits are negligible) that canbe sent on this ring? A. 8000 B frame B. 80,000 B frame C. 8 x 105 bit frame D. 10,000 B frame
Last Answer : 10,000 B frame
Description : In IPv4, what is the value of the total length field in bytes if the header is 28 bytes and the data field is 400 bytes?
Last Answer : 428
Description : the maximum window size for data transmission using the selective reject protocol with n-bit frame sequence numbers is: a. 2^n b. 2^(n-1) c. 2^n – 1 d. 2^(n-2)
Last Answer : b. 2^(n-1)
Description : It is the ratio of the transmission bit rate to the minimum bandwidth required for a particular modulation scheme
Last Answer : Bandwidth efficiency, Information density, or Spectral efficiency
Description : For the 16-PSK and a transmission system with a 10kHz bandwidth, determine the maximum bit rate
Last Answer : 40,000 bps
Description : It is the symmetrical expectation of the bit error rate in the system.
Last Answer : probability of errors
Description : A bit-stuffing based framing protocol uses an 8-bit delimiter pattern of 01111110. If the output bit-string after stuffing is 01111100101, then the input bit-string is a. 0111110100 b. 0111110101 c. 0111111101 d. 0111111111
Last Answer : b. 0111110101
Description : The distance between two stations M and N is L kilometers. All frames are K bits long. The propagation delay per kilometer is t seconds. Let R bits/second be the channel capacity. Assuming that processing ... maximum utilization, when the sliding window protocol used is: a. A b. B c. C d. D
Last Answer : c. C
Description : The final power amplifier in an FM transmitter usually operates class ___
Last Answer : C
Description : A synchronous transmission usually begins with which character
Last Answer : SYN
Description : The final power amplifier in an FM transmitter usually operates class ______.
Description : A synchronous transmission usually begins with which character?
Description : Suppose that the one-way propagation delay for a 100 Mbps Ethernet having 48-bit jamming signal is 1.04 micro-seconds. The minimum frame size in bits is: a. 112 b. 160 c. 208 d. 256
Last Answer : d. 256
Description : The size, shape, and dielectric material of a waveguide must be constant throughout its length for energy to move from one end to the other without reflections. What could be the effect in any abrupt change in its size or shape?
Last Answer : Reflections.
Description : A mode where the entire magnetic field is in the transverse plane and has no portion parallel to the length axis.
Last Answer : TM mode
Description : The reason a CSMA/CD network has a minimum length for packets is:
Last Answer : to make sure all other nodes hear a collision in progress
Description : A basic group
Last Answer : Occupies the frequency range from 60 to 108 kHz
Description : We add r redundant bits to each block to make the length n = k + r. The resulting n-bit blocks are called _________ A. datawords B. blockwords C. codewords D. none of the above
Last Answer : C. codewords
Description : In Unix, files can be protected by assigning each one a 9-bit mode called rights bits. Now, consider the following two statements: I. A mode of 641 (octal) means that the owner can read and write the file, other ... (B) Only II is correct (C) Both I and II are correct (D) Both I and II are incorrect
Last Answer : (C) Both I and II are correct
Description : A network with bandwidth of 10 Mbps can pass only an average of 15,000 frames per minute with each frame carrying an average of 8,000 bits. What is the throughput of this network? a. 2 Mbps b. 60 Mbps c. 120 Mbps
Last Answer : a. 2 Mbps
Description : A network with bandwidth of 10 Mbps can pass only an average of 15,000 frames per minute with each frame carrying an average of 8,000 bits. What is the throughput of this network ? (A) 2 Mbps (B) 60 Mbps (C) 120 Mbps (D) 10 Mbps
Last Answer : (A) 2 Mbps Explanation: In data transmission, throughput is the amount of data moved successfully from one place to another in a given period of time, and typically measured in bits per second (bps), ... second (Mbps) or gigabits per second (Gbps). Here, Throughput = 15000 x 8000/60 = 2 Mbps
Description : _______ refers to the structure or format of the data, meaning the order in which they are presented.
Last Answer : Semantics
Description : A ________ is a set of rules that governs data communication
Last Answer : protocol
Description : Sixteen different levels (symbols) are used to encode binary data. The channel bandwidth is 36 MHz. The maximum channel capacity is
Last Answer : 288 Mbps
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 : The characters making up the message in a synchronous transmission are collectively referred to as the data
Last Answer : block