11:41 a docs.google.com 1 Add file If you need to design a system for transmitting the output of a minicomputer to a line printer operating at a speed of 30 lines/sec over a voice grade telephone line with a bandwidth of 3 kHz. Assume that the line printer needs 16 bits of data per character and prints out 50 characters per line. What should be the minimum S/N to proceed this transmission? * 127 512 10 255 Submit Never submit passwords through Google Forms. This form was created inside of University of Baghdad. Report Abuse

11:41 a docs.google.com 1 Add file If you need to design a system for transmitting the output of a minicomputer to a line printer operating at a speed of 30 lines/sec over a voice grade telephone line with a bandwidth of 3 kHz. Assume that the line printer needs 16 bits of data per character and prints out 50 characters per line. What should be the minimum S/N to proceed this transmission? * 127 512 10 255 Submit Never submit passwords through Google Forms. This form was created inside of University of Baghdad. Report Abuse

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter8: Data And Network Communication Technology

Section: Chapter Questions

Problem 4VE

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55. Suppose a digitized voice channel is made by digitizing 8 kHz bandwidth analog voice signal. It is required to sample the signal at twice the highest frequency (two samples per hertz). What is the bit rate required, if it is assumed that each sample requires 8 bits? a. 32 kbps b. 64 kbps c. 128 kbps d. 256 kbps
Suppose a file of 10,000 bytes is to be sent over a line at 2400 bps. A. Calculate the overhead in bits and time in using asynchronous communication. Assume one start bit and a stop element of length one bit, and 8 bits to send the byte itself for each character. The 8-bit character consists of all data bits, with no parity bit. B. Calculate the overhead in bits and time using synchronous communication. Assume that the data are sent in frames. Each frame consists of 1000 characters = 8000 bits and an overhead of 48 control bits per frame. C. What would the answers to parts (a) and (b) be for a file of 100,000 characters?
Computer A uses the Go-back-N ARQ protocol to send a 110 Mbytes file to computer B with a window size of 15. Given each frame carries 100K bytes data. How long does it take to send the whole file (the total time taken from A sending the first bit of the file until A receiving the last acknowledgment)? Given that the transmission rate of the link is 500 Mbps and the propagation time between A and B is 15ms. Assume no data or control frame is lost or damaged and ignore the overhead due to header and trailer.
1. Compact discs record two channels (left and right) of music at a sampling frequency of ??=44.1kHz for each channel. If each sample is encoded with 16 bits, and one byte is 8 bits, how many bytes are required to store 48.1 seconds of music? 2. Consider a system that uses 8-bit ASCII codes to encode letters. How long (in microseconds) will it take to transmit the bit sequence encoding Hello-World! if we use a bit time of 4 samples per bit, and transmit samples at a rate of 1MHz? 3. The ASCII table below gives the ASCII codes for common alphanumeric characters and symbols listed from MSB to LSB. What is the bit sequence encoding the message 113? Assume that we transmit the codes of each character in sequence with the LSB first.
A common measure of transmission for digital data is the baud rate, defined as the numberof bits transmitted per second. Generally, transmission is accomplished in packets consisting ofa start bit, a byte of information, and a stop bit. Using these facts, answer the following: How many minutes would it take to transmit a 640 x 480 px color image with eachchannel having 256 gray levels using a 10 Mbps modem?
We want to send to a file of 2MB by using asynchronous serial transmission with a parity added to each byte. Find the transmission time (minutes) over a 115.200 baud line with two stop bits.
Given are the following codewords for an error control coding scheme data 000 011 100 codeword 00011000 00000111 10101000 . a.What is the minimum Hamming distance? b. What is the coding rate for this scheme? c. what raw data rate would be required if we need a throughput of 6 Mpbs? d. in a different situation, the number of data bits to transfer is 5, and the minimum hamming distance is dmin=5. find the maximum coding rate for this situation
4. Write a program to get 8-bit data from P2 and send it to ports PO, P1, and P3. ORG 0000H MOV MOV P2, A MOV A, P2 HERE: SJMP HERE END
6. Delays. A user in Madagascar, connected to the internet via a 100 Mb/s (b-bits) connection retrieves a 250 KB (B-bytes) web page from a server in Tokyo, where the page references three images of 500 KB each. Assume that the one-way propagation delay is 82 ms and that the user's access link is the bandwidth bottleneck for this connection. a. Approximately how long does it take for the page (including images) to appear on the user's screen, assuming non-persistent HTTP using a single connection at a time? (For this part, you should ignore queueing delay and transmission delays at other links in the network) How long does it take if the connection uses persistent HTTP (single connection)? b. c. Suppose that user's access router has a 4 MB buffer (B-byte) on the link from the router to the user. How much delay does this buffer add during periods when the buffer is full? d. Assume a cache rate of 45% on the information received by the user in Madagascar from the Tokyo server. How does…
#45.! Consider the following bit stream-a. 00000000 b. 11111111 c. 01010101 d. 00110011 Draw the graph of the i. Manchester using each of the given data streams, assuming that the last signal level has been positive. From thegraphs, guess the bandwidth for this scheme using the average number of changes in the signal level... .
1-A system has received 2 bytes of transmission, with the first bit being an extra odd parity bit: 100001111, 001010101. Is there detectable error? 2- A digital recording of audio file is 120 seconds, with bitrate 44 Kbps. Write down the exact number of KB needed for this recording. 3-Write down the smallest number in decimal, that can be represented by 11bit signed binary
10. The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is known as a. Bit stuffing b. Piggy backing c. Pipelining d. Broadcasting