Recent questions tagged tcp

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Andrew S. Tanenbaum Edition 5th Exercise 6 Question 35 (Page No. 609)
To address the limitations of IP version 4, a major effort had to be undertaken via IETF that resulted in the design of IP version 6 and there are still is significant reluctance in the adoption of this new version. However, no such major effort is needed to address the limitations of TCP. Explain why this is the case.

asked 12 hours ago in Computer Networks by ajaysoni1924 Loyal (6.3k points) | 3 views

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Andrew S. Tanenbaum Edition 5th Exercise 6 Question 34 (Page No. 609)
What is the fastest line speed at which a host can blast out 1500-byte TCP payloads with a 120-sec maximum packet lifetime without having the sequence numbers wrap around? Take TCP, IP, and Ethernet overhead into consideration. Assume that Ethernet frames may be sent continuously.

asked 12 hours ago in Computer Networks by ajaysoni1924 Loyal (6.3k points) | 1 view

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Andrew S. Tanenbaum Edition 5th Exercise 6 Question 33 (Page No. 609)
A TCP machine is sending full windows of 65,535 bytes over a 1-Gbps channel that has a 10-msec one-way delay. What is the maximum throughput achievable? What is the line efficiency?

asked 12 hours ago in Computer Networks by ajaysoni1924 Loyal (6.3k points) | 2 views

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Andrew S. Tanenbaum Edition 5th Exercise 6 Question 32 (Page No. 609)
If the TCP round-trip time, RTT, is currently 30 msec and the following acknowledgements come in after 26, 32, and 24 msec, respectively, what is the new RTT estimate using the Jacobson algorithm? Use α = 0.9.

asked 12 hours ago in Computer Networks by ajaysoni1924 Loyal (6.3k points) | 1 view

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5

Andrew S. Tanenbaum Edition 5th Exercise 6 Question 30 (Page No. 609)
Consider the effect of using slow start on a line with a 10-msec round-trip time and no congestion. The receive window is 24 KB and the maximum segment size is 2 KB. How long does it take before the first full window can be sent?

asked 13 hours ago in Computer Networks by ajaysoni1924 Loyal (6.3k points) | 1 view

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Andrew S. Tanenbaum Edition 5th Exercise 6 Question 29 (Page No. 609)
Describe two ways to get into the SYN RCVD state of Figure.

asked 13 hours ago in Computer Networks by ajaysoni1924 Loyal (6.3k points) | 2 views

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Andrew S. Tanenbaum Edition 5th Exercise 6 Question 28 (Page No. 608)
The maximum payload of a TCP segment is 65,495 bytes. Why was such a strange number chosen?

asked 13 hours ago in Computer Networks by ajaysoni1924 Loyal (6.3k points) | 4 views

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Andrew S. Tanenbaum Edition 5th Exercise 6 Question 27 (Page No. 608)
In Fig. 6-36 we saw that in addition to the 32-bit acknowledgement field, there is an ACK bit in the fourth word. Does this really add anything? Why or why not?

asked 13 hours ago in Computer Networks by ajaysoni1924 Loyal (6.3k points) | 2 views

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Andrew S. Tanenbaum Edition 5th Exercise 6 Question 26 (Page No. 608)
A process on host 1 has been assigned port p, and a process on host 2 has been assigned port q. Is it possible for there to be two or more TCP connections between these two ports at the same time?

asked 13 hours ago in Computer Networks by ajaysoni1924 Loyal (6.3k points) | 3 views

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Andrew S. Tanenbaum Edition 5th Exercise 6 Question 23 (Page No. 608)
Datagram fragmentation and reassembly are handled by IP and are invisible to TCP. Does this mean that TCP does not have to worry about data arriving in the wrong order?

asked 13 hours ago in Computer Networks by ajaysoni1924 Loyal (6.3k points) | 1 view

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11

Andrew S. Tanenbaum Edition 5th Exercise 6 Question 22 (Page No. 608)
What is the total size of the minimum TCP MTU, including TCP and IP overhead but not including data link layer overhead?

asked 13 hours ago in Computer Networks by ajaysoni1924 Loyal (6.3k points) | 1 view

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Andrew S. Tanenbaum Edition 5th Exercise 6 Question 19 (Page No. 608)
Both UDP and TCP use port numbers to identify the destination entity when delivering a message. Give two reasons why these protocols invented a new abstract ID (port numbers), instead of using process IDs, which already existed when these protocols were designed.

asked 16 hours ago in Computer Networks by ajaysoni1924 Loyal (6.3k points) | 5 views

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Self doubt- TCP congestion control
When during TCP congestion control, timeout occurs in 5th transition, then shall those packets be considered as received or shall be resent? Asking for if question asks for number of transmission to send given number of packets using TCP congestion slow start phase.

asked Feb 1 in Computer Networks by Markzuck Junior (633 points) | 26 views

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Made easy test series mock congestion control
Consider a TCP connection using the multiplicative additive congestion control algorithm where the window size at the start is 1 MSS and the threshold is 32 MSS. At the 8th transmission timeout occurs and enters in a congestion detection phase. The value of window size (in MSS) at the end of 12th transmission is .

asked Jan 30 in Computer Networks by Ram Swaroop Active (2.5k points) | 63 views

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15

MadeEasy Subject Test 2019: Computer Networks - Congestion Control
Consider a TCP connection using the multiplicative additive congestion control algorithm where the window size at the start is $1 MSS$ and the threshold is $32 MSS$, at the $8th$ transmission time out occurs and enters in a ... at the end of $12th$ transmission___? My answer is 16 while ME has given answer as 8, plz verify.

asked Jan 22 in Computer Networks by chauhansunil20th Active (4.8k points) | 205 views

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16

Ace Test Series 2019: Computer Networks - Congestion Control

asked Jan 19 in Computer Networks by Na462 Loyal (8.7k points) | 18 views

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17

MadeEasy Subject Test 2019: Computer Networks - Tcp
If TCP RTT is currently 20 ms and following acknowledgement come in after 22,24 and 23 ms respectively. What is new RTT estimate ? 28.527 28.82 20.82 21.22

asked Jan 16 in Computer Networks by Na462 Loyal (8.7k points) | 36 views

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18

Computer net - York University
Consider a TCP connection between two machines (A and B) in an environment with 0% packet loss. Assume the round trip time (RTT) between the two machines is 4 [seconds], and the segment size is 3 [Kbytes]. The bandwidth of ... the sender before the first ack arrives back.) ? https://www.eecs.yorku.ca/course_archive/2010-11/W/3214/CSE3214_Final_Winter2010_solutions.pdf

asked Jan 15 in Computer Networks by AMALJITH Active (1.1k points) | 50 views

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MadeEasy Test Series 2019: Computer Networks - Congestion Control
here TOTAL 2000 segments need to be sent, and after x RTT, it will send 2001 segments but for total we shall take count of addition of all the previous also na?

asked Jan 10 in Computer Networks by Markzuck Junior (633 points) | 109 views

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20

MadeEasy Test Series 2019: Computer Networls - Congestion Control
Please help, I am getting total number of transmission to get BACK TO 38 as 14 and NOT 15. after 14th, it would have became 38, so no need to consider 15th segment right?

asked Jan 8 in Computer Networks by Markzuck Junior (633 points) | 135 views

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21

MadeEasy Test Series: Computer Networks - IP Packet
Fragmentation is only done at the DATA part of the IP layer and NOT the IP header right? in above, 1st should be 920 instead of 940 as 20B of IP header shall not be counted in fragmentation right? please help with a detailed solution.

asked Jan 8 in Computer Networks by Markzuck Junior (633 points) | 60 views

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22

Computer network tcp congestion control

asked Jan 7 in Computer Networks by mitesh kumar (327 points) | 45 views

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23

fast retransmit and fast recovery mechanism
Consider the following plot of TCP window size as a function of time. Assume TCP is operating with slow start, congestion avoidance, fast retransmit and fast recovery mechanism. What is the time interval where the slow start ... value of threshold. It starts congestion avoidance phase again. Please explain in more details about the concept underlying?

asked Jan 6 in Computer Networks by Sandy Sharma Active (1.3k points) | 29 views

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24

Does each ACK packet also include window size in TCP connection?
While solving a question I ran through the following statement: RcvWindow is the part of the receiver's buffer that's changing all the time depending on the processing capability at the receiver's side and the network traffic ... window size is also conveyed with ACK? If not then how does sender knows about the changed window size?

asked Dec 28, 2018 in Computer Networks by Pratik Gawali Junior (909 points) | 44 views

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1 answer

25

Testbook test series - Computer Networks TCP
Question: TCP opens a connection using an initial sequence number of 3500 and sends data at a rate of 5MBps. The other party opens a connection with a sequence number of 1200. Wrap around time for both sequence number differs by 12562.77 sec. ... $\frac{2^{_{32}}}{Bandwidth}$ Which one is correct?

asked Dec 26, 2018 in Computer Networks by Akash Mishra Active (1.1k points) | 68 views

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26

Testbook Test Series: Computer Networks - Tcp
TCP opens a connection using an initial sequence number of 3500 and sends data at 5 MBps. The other party opens the connection with a sequence number of 1200. Wrap around time for both the sequence numbers differ by 12562.77 sec. Calculate the data rate(in KB) for the second party.

asked Dec 23, 2018 in Computer Networks by Aarvi Chawla (337 points) | 90 views

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27

# CN TCP connection establishment doubt about MSS
Say Client buffer is of 12000 Bytes and MSS is 1200 B and this info is sent to server and now server send the info in (SYN +ACK) segment as Server Buffer = 18000 B and MSS is 600 B Now in data transfer phase does both Client and ... 1200, 600) = 600 Bytes? Or does the sever will send 1200 Bytes segments to C and C sends 600 B segments to server?

asked Dec 16, 2018 in Computer Networks by iarnav Loyal (9.6k points) | 66 views

+1 vote

1 answer

28

Madeesay Test Series
Consider TCP implements an extension that allows window size much larger than 64KB. Suppose you are using this extended TCP over a 1Gbps link with a latency of 50ms to transfer a 10 MB file and TCP receive window is 1MB. If TCP sends 1KB packet ... multiplied by link latency, then effective throughput of transfer is x Mbps. Find x. (Assuming no congestion and no lost packets)

asked Dec 6, 2018 in Computer Networks by Ankit Gupta 5 (85 points) | 129 views

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29

#CN UserGate 2004 IPV4 question
Consider three IP networks A,B and C. Host HA in network A sends messages each containing 180 bytesof application data to a host HC in network C. The TCP layer prefixes 20 byte header to the message. This passes through an intermediate network B. ... ). My question is what's the overhead at Network Layer and also at Transport Layer of the Host C (Destination Host)

asked Dec 5, 2018 in Computer Networks by iarnav Loyal (9.6k points) | 45 views

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