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Recent questions tagged data-link-layer

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Applied Test Series
In the CSMA/CD network the bandwidth of the link is 10 Mbps, two stations are connected at both the ends of the link. The speed of the transmission on the links is 5 x 10...
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Applied Test Series
How big would the window size have to be for the channel utilization to be greater than 98 percent and the bandwidth is 1 Gbps? Suppose that the size of a packet is 1,500...
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Applied Test Series
A link has a transmission speed of 500 × 10^6 bpsec. Assume acknowledgment has negligible transmission delay, and it's one way propagation delay is 2 sec. Also assumes th...
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Applied Test Series
In the GO back N ARQ sender is sending the 20 packets to the destination with a window size of 4. Every sixth packet is lost and after a packet loss sender is sending one...
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Applied Test Series
Two systems are connected with the link and link is having a bandwidth of 20 Mbps. Assume the distance between them is 2400 km and the size of the packet is 2 KB with pr...
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Applied Test Series
In a CDMA/CD network with a data rate of 20 Mbps, the maximum distance between station pair is found to be 2000 m then what is the minimum transmission time(in sec) for t...
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Applied Test Series
Consider a selective repeat sliding window protocol, the window size of the sender is 128. What will be the sequence number for the 800th frame? [ Assume the available se...
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Applied Test Series
Consider source and destination in a 10 Mbps network with sender window has 5 packets. Transmission delay for a packet is 10 micro-sec. Propagation delay from source to d...
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Applied Test Series
How big would the window size have to be for the channel utilization to be greater than 98 percent and the bandwidth is 1 Gbps? Suppose that the size of a packet is 1,500...
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UGC NET CSE | June 2005 | Part 2 | Question: 26
Which of the following are Data link layer standard ?Ethernet$HSSI$Frame Relay$10$-base $T$Token ring$1,2$$1, 3, 5$$1, 3, 4, 5$$1,2, 3, 4, 5$
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ISI2018-PCB-CS9
The data link layer uses a fixed-size sliding window protocol, where the window size for the connection is equal to twice the bandwidth-delay product of the network path....
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Kurose and Ross Edition 6 Exercise 1 Question P28 (Page No 76)
Suppose two hosts, A and B, are separated by 20,000 kilometers and are connected by a direct link of R = 2 Mbps. Suppose the propagation speed over the link is $2.5×10^8$...
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Kurose and Ross Edition 6 Exercise 1 Question P29 (Page No 76)
Suppose there is a 10 Mbps microwave link between a geostationary satellite and its base station on Earth. Every minute the satellite takes a digital photo and sends it t...
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Kurose and Ross Edition 6 Exercise 1 Question P6 (Page No 72)
This elementary problem begins to explore propagation delay and transmission delay, two central concepts in data networking. Consider two hosts, A and B, connected by a s...
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Andrew S. Tanenbaum Edition 5th Exercise 5 Question 6 (Page No. 490)
Consider the network of Figure. Distance vector routing is used, and the followingvectors have just come in to router C: from B: (5, 0, 8, 12, 6, 2); from D: (16, 12,6, 0...
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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 39 (Page No. 255)
The goal of this lab exercise is to implement an error-detection mechanism using thestandard CRC algorithm described in the text. Write two programs, generator andverifie...
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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 34 (Page No. 254)
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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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 33 (Page No. 254)
Compute the fraction of the bandwidth that is wasted on overhead (headers and retransmissions)for protocol selective repeat on a heavily loaded 50-kbps satellite channel ...
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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 32 (Page No. 254)
Frames of 1000 bits are sent over a 1-Mbps channel using a geostationary satellitewhose propagation time from the earth is 270 msec. Acknowledgements are alwayspiggybacke...
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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 30 (Page No. 253)
Consider the operation of protocol 6 ( Selective repeat Protocol) over a 1-Mbps perfect (i.e., error-free) line. The maximum frame size is 1000 bits. New packets are gene...
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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 27 (Page No. 253)
(a) The distance from earth to a distant planet is approximately 9 × 1010 m. What is thechannel utilization if a stop-and-wait protocol is used for frame transmission on ...
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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 25 (Page No. 253)
In protocol 6( Selective repeat Protocol ), when a data frame arrives, a check is made to see if the sequence numberdiffers from the one expected and no nak is true. If b...
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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 23 (Page No. 253)
Imagine a sliding window protocol using so many bits for sequence numbers thatwraparound never occurs. What relations must hold among the four window edgesand the window ...
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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 22 (Page No. 253)
A 3000-km-long T1 trunk is used to transmit 64-byte frames using Protocol GO back N. If thepropagation speed is 6 μsec/km, how many bits should the sequence numbers be?(...
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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 20 (Page No. 253)
A channel has a bit rate of 4 kbps and a propagation delay of 20 msec. For what rangeof frame sizes does stop-and-wait give an efficiency of at least 50%?
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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 19 (Page No. 253)
In the discussion of ARQ protocol , a scenario was outlined that resultedin the receiver accepting two copies of the same frame due to a loss of acknowledgementframe. Is ...
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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 18 (Page No. 253)
A 1024-bit message is sent that contains 992 data bits and 32 CRC bits. CRC is computedusing the IEEE 802 standardized, 32-degree CRC polynomial. For each of thefollowing...
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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 17 (Page No. 253)
A bit stream 10011101 is transmitted using the standard CRC method described in thetext. The generator polynomial is x 3 + 1. Show the actual bit string transmitted. Supp...
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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 16 (Page No. 253)
What is the remainder obtained by dividing $x^7 + x ^5 + 1$ by the generator polynomial $x^ 3 + 1?$
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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 15 (Page No. 253)
Suppose that a message 1001 1100 1010 0011 is transmitted using Internet Checksum(4-bit word). What is the value of the checksum?
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