Suppose we have a 1Gbps network connection from Boston to New York. There is a TCP link with window size is 6000B over the network. The one-way delay on the link it 25 ms.
Time taken to transmit 6000B over the network:
= (6000 * 8 bits) / (1 * 109 Gbps) = 48 * 10-6 sec = 0.048 ms
Hence, total delay = 25 + 0.048 = 25.048 ms
Suppose we have a 1Gbps network connection from Boston to New York. There is a TCP...
Question 1.) An ISP guarantees a minimum 102 kbps download speed. What should be the minimum TCP window size in bytes for a user who is downloading a large file through a link with with 28 ms round trip time? Assume that this network has a MSS of 512 bytes. Question 2.) Now this TCP connection is suddenly routed through a 204 ms delay link. For example the connection may have been using a terrestrial link before, but now use...
Suppose vacationers and business travelers have the following demand for airline tickets from New York to Boston: a) As the price of tickets rises from $200 to $250, what is the price elasticity of demand for (i) business travelers and (ii) vacationers? b) Why might vacationers have a different elasticity than business travelers?
Assume a TCP sender is continuously sending 1,369-byte segment. If a TCP receiver advertises a window size of 7,001 bytes, and with a link transmission rate 34 Mbps an end-to-end propagation delay of 30.7 ms, what is the utilization? Assume no errors, no processing or queueing delay, and ACKs transmit instantly. Also assume the sender will not transmit a non-full segment. Give answer in percentages, rounded to one decimal place, without units (e.g. for an answer of 10.43% you would...
The next three questions are related to the local area network shown below. In this network computers attached to links 1 & 2 send data to the server attached to link 3. The three devices are connected through a router. Link 1 Link 2 Link 3 Following parameters of the network have been provided. Propagation delay in link 1-138 micro seconds Propagation delay in link 2-309 micro seconds Propagation delay in link 3-216 micro seconds Frame size 1432 bytes ACK...
TCP Connection Setup consists of a "three-way handshake:" SYN,
SYN-ACK, ACK.
Which one(s) of these three
segments specifies an initial sequence number?
Which one(s) of these three
segments is permitted to contain application data?
Congestion Window Size versus Transmission Rounds 140 120 100 80 Congestion Window Size (in segments) 60 40 2. 20 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Transmission...
You are hired to design a reliable byte-stream protocol that uses a sliding window (like TCP). This protocol will run over a 1-Gbps network. The RTT of the network is 200 ms. How many bits would you include in the AdvertisedWindow field of your protocol header? (choose the closest number that can satisfy the above requirement). Hints: - First, determine how much data to keep the pipe full (i.e. delay * bandwidth) - Second, if we assume the window is...
Suppose remote host A wishes to use a TCP-based VPN connection to connect to host B, with IP address 200.0.0.7. However, the VPN software is not available for host A. Host A is, however, able to run that software on a virtual machine V hosted by A; A and V have respective IP addresses 10.0.0.1 and 10.0.0.2 on the virtual network connecting them. V reaches the outside world through network address translation (7.7 Network Address Translation), with A acting as...
. Consider a TCP connection between Host A and Host B. Suppose that the TCP segments traveling from Host A to Host B have source port number 37 and destination port number 61. What are the source and destination port numbers for the segments traveling from Host B to Host A? . Suppose a process in Host C has a UDP socket with port number 6789. Sup- pose both Host A and Host B each send a UDP segment to...
3. Suppose the price elasticity of demand for subway trains in Boston and New York City is almost close to zero. If the city authority raises the fare of MBTA passengers by 20% over its current prices to cover the loss of operation of MBTA, how much increase in revenue do you expect due to fare increase of 20%? Give reasoning to substantiate your answer.
For personal reasons, you have moved from Boston to New York. Having gone through several in job interviews, you now have two choices: You may join company A – a strong brand with a high market share, or company B – a relatively young start-up with a market share of below 1%. Pleas discuss both options including a salary scheme you would prefer in company A and B.