The message 11001001 is to be transmitted
using the CRC polynomial x^3 + 1 to
protect it from errors. The message that
should be transmitted is:
a. 11001001000
b. 11001001011
c. 11001010
d. 110010010011

1 Answer

Answer :

b. 11001001011

Related questions

Description : The message 11001001 is to be transmitted using the CRC polynomial x3+1 to protect it from errors. The message that should be transmitted is (A) 110010011001 (B) 11001001 (C) 110010011001001 (D) 11001001011

Last Answer : (D) 11001001011

Description : If the frame to be transmitted is 1101011011 and the CRC polynomial to be used for generating checksum is x 4+ x + 1, then what is the transmitted frame? a. 11010110111011 b. 11010110111101 c. 11010110111110 d. 11010110111001

Last Answer : c. 11010110111110

Description : _______ can detect burst error of length less than or equal to degree of the polynomial and detects burst errors that affect odd number of bits. a. Hamming Code b. CRC c. VRC d. None of the above

Last Answer : b. CRC

Description : Let G(x) be the generator polynomial used for CRC checking. What is the condition that should be satisfied by G(x) to detect odd number of bits in error? a. G(x) contains more than two terms b. G(x) does ... exceeding the frame length c. 1+x is a factor of G(x) d. G(x) has an odd number of terms

Last Answer : c. 1+x is a factor of G(x)

Description : What is the main difference between DDCMP and SDLC? a. DDCMP does not need special hardware to final the beginning of a message b. DDCMP has a message header c. SDLC has a IP address d. SDLC does not use CRC

Last Answer : DDCMP does not need special hardware to final the beginning of a message

Description : Find the transmitted code if the frame is (MSB) 1101011011 (LSB) and generator polynomial is x4 + x + 1. A. 1101011011 1110 B. 1101011111 1110 C. 1101011011 1111 D. 1101011011

Last Answer : A. 1101011011 1110

Description : Let G(x) be generator polynomial used for CRC checking. The condition that should be satisfied by G(x) to correct odd numbered error bits, will be: (1) (1+x) is factor of G(x) (2) (1-x) is factor of G(x) (3) (1+x2) is factor of G(x) (4) x is factor of G(x)

Last Answer : (1+x) is factor of G(x)

Description : The Internet Control Message Protocol (ICMP) A. allows gateways to send error acontrol messages toother gateways or hosts B. provides communication between the Internet Protocol Software on one machine ... and takeaction to correct theproblem D. All of theabove E. None of the above

Last Answer : All of theabove

Description : In the Ethernet frame, the_______field contains error detection information. A) CRC B) preamble C) address D) none of the above

Last Answer : CRC

Description : In the Ethernet, the _______field is actually added at the physical layer and isnot (formally)part of the frame. A) CRC B) preamble C) address D) none of the above

Last Answer : preamble

Description : . In cyclic redundancy checking, the divisor is _______the CRC. A) The same size as B) one bit less than C) one bit more than D) none of the above

Last Answer : one bit more than

Description : Which error detection method consists of just one redundant bit per data unit? A) Simple parity check B) Two-dimensionalparity check C) CRC D) Checksum

Last Answer : Simple parity check

Description : Which error detection method usesone's complement arithmetic? A) Simple parity check B) Two-dimensionalparity check C) CRC D) Checksum

Last Answer : Checksum

Description : Which of the following statements is TRUE? a. Both Ethernet frame and IP packet include checksum fields b. Ethernet frame includes a checksum field and IP packet includes a CRC field c. Ethernet ... and IP packet includes a checksum field d. Both Ethernet frame and IP packet include CRC fields

Last Answer : Ethernet frame includes a CRC field and IP packet includes a checksum field

Description : In CRC if the data unit is 100111001 and the divisor is 1011 then what is dividend at the receiver? a. 100111001101 b. 100111001011 c. 100111001 d. 100111001110

Last Answer : b. 100111001011

Description : CRC stands for __________ a. cyclic redundancy check b. code repeat check c. code redundancy check d. cyclic repeat check

Last Answer : a. cyclic redundancy check

Description : Which error detection method uses one's complement arithmetic? A. Simple parity check B. Two-dimensional parity check C. CRC D. Checksum

Last Answer : D. Checksum

Description : CRC stands for __________ A. cyclic redundancy check B. code repeat check C. code redundancy check D. cyclic repeat check

Last Answer : A. cyclic redundancy check

Description : Write short notes on CRC checker.

Last Answer : After receiving the data appended with the CRC it does the same modulo-2 division. If the remainder is all 0’s the CRC is dropped and the data accepted. Otherwise, the received stream of bits is discarded and the data are resent.

Description : Convert the Hex number DA to binary. A. 11001010 B. 11011011 C. 11011010 D. 11011110

Last Answer : C. 11011010

Description : The _______ of a polynomial is the highest power in the polynomial. A) range B) degree C) power D) none of the above

Last Answer : degree

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 : In the MIME header field, ____describes how the object within the body was encoded in order that it be included in the message using a mail-safe form. a. content-type b. content-transfer-encoding c. content-description d. content-id

Last Answer : b. content-transfer-encoding

Description : . ________ is the process in which the receiver tries to guess the message by using redundant bits A. Connection-Oriented Service B. Forward error correction C. both a and b D. Confirm

Last Answer : B. Forward error correction

Description : The objective of testing is ? Debugging To uncover errors To gain modularity To analyze system

Last Answer : To uncover errors

Description : The primary advantage of key-to-tape data entry system is a. A large percentage of editing can be performed at the time of data entry b. Key verification is easily performed c. The tape is reusable d. Keying errors can be detected as they occur

Last Answer : The tape is reusable

Description : . The _____of errors is more difficult than the ______. A) correction; detection B) detection; correction C) creation; correction D) creation;detection

Last Answer : correction; detection

Description : A simpleparity-check code can detect__________ errors. A) an even-number of B) two C) no errors D) an odd-number of

Last Answer : an odd-number of

Description : To guarantee correction ofup to 5 errors in all cases, the minimum Hamming distance in a block code must be________. A) 5 B) 6 C) 11 D) none of the above

Last Answer : 11

Description : Error rate is A. an error-detectingcode based ona summation operation performed onthebits to be checked. B. a checkbit appended to anarrayof binary digits to make thesum of all thebinary digits. C. a ... ratioof the number ofdata units in error to the total number of dataunits E. None of the above

Last Answer : the ratioof the number ofdata units in error to the total number of dataunits

Description : Which of the following refers to theterms "residual error rate"? A. the number of biterrors per twenty four hours of continuous operation onanasynchronous line B. The probability that one or moreerrors ... tonoise ratio dividedby the ratio of energy perbit to noise per hertz E. None of the above

Last Answer : The probability that one or moreerrors will be undetected whenan error detection scheme is used

Description : To guarantee correction of upto t errors, the minimum Hamming distance d min in a block code must be ________. a. t+1 b. t−2 c. 2t−1 d. 2t+1

Last Answer : d. 2t+1

Description : When does the station B send a positive acknowledgement (ACK) to station A in Stop and Wait protocol? a. only when no error occurs at the transmission level b. when retransmission of old packet in a novel frame is necessary c. only when station B receives frame with errors d. all of the above

Last Answer : only when no error occurs at the transmission level

Description : To guarantee the detection of up to 5 errors in all cases, the minimum Hamming distance in a block code must be _______ A. 5 B. 6 C. 11 D. none of the above

Last Answer : B. 6

Description : A simple parity-check code can detect __________ errors A. an even-number of B. two C. no errors D. an odd-number of

Last Answer : D. an odd-number of

Description : Define Error Detection and Correction. Mention the types of errors.

Last Answer : Data can be corrupted during transmission. For reliable communication, errors must be detected and corrected. Single bit error: The only one bit of a given data unit (such as byte character/data unit or packet) is ... error: 2 or more bits in the data unit have changed from 1 to 0 from 0 to 1.

Description : Avalanche photodiode receivers can detect bits of transmitted data by receiving a. 100 photons b. 200 photons c. 2000 photons d. 300 photons

Last Answer : 200 photons

Description : ______ can be applied whenthe bandwidth of a link (in hertz) is greater than the combined bandwidths of the signals to be transmitted. A) TDM B) FDM C) Both (a)or (b) D) Neither (a) or (b)

Last Answer : FDM

Description : Before data can be transmitted, they must be transformed to________. A) periodic signals B) electromagnetic signals C) aperiodic signals D) low-frequency sine waves

Last Answer : electromagnetic signals

Description : In SONET, for each byte, the bitsare transmitted ____________. A) from least significant to the most significant B) from most significant tothe least significant C) two at atime D) three at atime

Last Answer : from least significant to the most significant

Description : In SONET, for each frame, the bytes are transmitted __________. A) from left to the right, top to bottom B) from right to theleft, bottom to top C) from left to the right, bottom to top D) from right to the left, top to bottom

Last Answer : from left to the right, bottom to top

Description : What is the usualnumber of bits transmitted simultaneously inparalleldata transmission used by microcomputers? A. 16 B. 9 C. 8 D. 4 E. None of the above

Last Answer : 9

Description : An error-detectingcode inserted asa field in a blockof data tobe transmitted is known as A. Frame check sequence B. Error detecting code C. Checksum D. flow control E. None of the above

Last Answer : Frame check sequence

Description : Avalanche photodiode receivers candetect hits of transmitted databy receiving A. 100 photons B. 200 photons C. 300 photons D. 400 photons E. None of the above

Last Answer : 200 photons

Description : Frames from oneLAN can be transmitted to anotherLAN viathe device A. Router B. Bridge C. Repeater D. Modem

Last Answer : Bridge

Description : In which layer of OSI session is first check and then data is transmitted a. Application layer b. Presentation layer c. Session layer d. Transport layer

Last Answer : c. Session layer

Description : The _____ layer uses data compression to reduce the number of bits to be transmitted. a. presentation b. network c. data link d. application

Last Answer : a. presentation

Description : In Ethernet CSMA/CD, the special bit sequence transmitted by media access management to handle collision is called a. Preamble b. Postamble c. Jam d. None of the above

Last Answer : c. Jam

Description : A noise where foreign signal enters the path of the transmitted signal is called …… A. Impulse B. Inter modulation C. cross talk D. both b and c

Last Answer : C. cross talk