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Recent questions tagged tanenbaum

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tanenbaum
Consider an error-free 64-kbps satellite channel used to send 512-byte data frames in one direction, with very short acknowledgements coming back the other way. What is the maximum throughput for window sizes of 1, 7, 15, and 127? The earth-satellite propagation time is 270 msec
Consider an error-free 64-kbps satellite channel used to send 512-byte data frames inone direction, with very short acknowledgements coming back the other way. What isthe...
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7 votes
4 answers
454
tanenbaum computer networks
A $3000$km-long T1 trunk having Transmission time $1.544$ Mbps is used to transmit $64$byte frames using Go back -N. If the propagation speed is $6$ μsec/km, how many bits should the sequence numbers be?
A $3000$km-long T1 trunk having Transmission time $1.544$ Mbps is used to transmit $64$byte frames using Go back -N.If the propagation speed is $6$ μsec/km, how many b...
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455
tanenbaum
An upper-layer packet is split into 10 frames, each of which has an 80% chance of arriving undamaged. If no error control is done by the data link protocol, how many times must the message be sent on average to get the entire thing through? how is it different if we use error control ?
An upper-layer packet is split into 10 frames, each of which has an 80% chance of arrivingundamaged. If no error control is done by the data link protocol, how manytimes ...
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1 votes
0 answers
456
Tanenbaum
In selective repeat SR protocol, MAX_SEQ = 2^n - 1. While this condition is obviously desirable to make efficient use of header bits, we have not demonstrated that it is essential. Does the protocol work correctly for MAX_SEQ = 4, for example?
In selective repeat SR protocol, MAX_SEQ = 2^n - 1. While this condition is obviously desirable to make efficient use of header bits, we have not demonstrated that it is ...
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3 votes
3 answers
459
TANENBAUM - Memory Management - Paging
A computer has 32-bit virtual addresses and 4-KB pages. The program and data together fit in the lowest page (0-4095). The stack fits in the highest page. How many page table entries are needed for two-level paging, with 10 bits in each part?
A computer has 32-bit virtual addresses and 4-KB pages. The program and data together fit in the lowest page (0-4095). The stack fits in the highest page. How many page ...
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5 answers
460
how many bits fit in a cable
A 100 Km long cable runs at 154 Mbps data rate. The prop speed in the cable is 2/3 of light. how many bits fit in the cable ? 1) 772 2) 700 3) 782 4) 770
A 100 Km long cable runs at 154 Mbps data rate. The prop speed in the cable is 2/3 of light. how many bits fit in the cable ?1) 7722) 7003) 7824) 770
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