Recent questions in Computer Networks

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1

Made Easy Test Series: Computer Network-Dijkstra Algo
Consider Dijkstra's algorithm in linked state routing protocol at node $u.$ Professor Ram first sets the route for each directly connected node $v.$ to be the link connecting $u$ to $v.$ Ram then implements the rest of the algorithm ... costs where all routing table entry will be correct. $D)$ Both $A)$ and $B)$ How Dijkstra working here?

asked May 14 in Computer Networks by srestha Veteran (114k points) | 22 views

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2

ISI2018-PCB-B9
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. Consider the following three scenarios, in each of which only the given parameter changes as specified (no ... minimum value of the round trip time $R$ increases to $1.8R$; the window size $W$ decreases to $W/3$

asked May 12 in Computer Networks by akash.dinkar12 Boss (40.5k points) | 19 views

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3

Self Doubt :Bit Stuffing
End delimeter is → 0111 data to be sent 0111111111. What is the data we should send to the reciever?

asked May 8 in Computer Networks by Hirak Active (2k points) | 88 views

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4

Pgee mock exam

asked Apr 23 in Computer Networks by Dipanshu Rana (383 points) | 24 views

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5

Made Easy Test Series: Computer Network-ICMP
Consider a very large network $10000$ routers. Two host $A$ and $B$ connected with this network. Host $A$ sends a data to host $B$. and after some unit of time host $A$ receives $ICMP$ time exceed message for the samedata ... some ICMP message generated? Say if $ICMP$ message generated in $9999th$ router, then where it give error of time exceed message?

asked Apr 20 in Computer Networks by srestha Veteran (114k points) | 99 views

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6

Kurose and Ross Edition 6 Exercise 3 Question R18 (Page No 288)
True or false? Consider congestion control in TCP. When the timer expires at the sender, the value of ssthresh is set to one half of its previous value.

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 61 views

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7

Kurose and Ross Edition 6 Exercise 3 Question R17 (Page No 287)
Suppose two TCP connections are present over some bottleneck link of rate R bps. Both connections have a huge file to send (in the same direction over the bottleneck link). The transmissions of the files start at the same time. What transmission rate would TCP like to give to each of the connections?

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 27 views

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Kurose and Ross Edition 6 Exercise 3 Question R15 (Page No 287)
Suppose Host A sends two TCP segments back to back to Host B over a TCP connection. The first segment has sequence number 90; the second has sequence number 110. How much data is in the first segment? Suppose that the ... segment arrives at B. In the acknowledgment that Host B sends to Host A, what will be the acknowledgment number?

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 38 views

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Kurose and Ross Edition 6 Exercise 3 Question R14 (Page No 287)
True or false? Host A is sending Host B a large file over a TCP connection. Assume Host B has no data to send Host A. Host B will not send acknowledgments to Host A because Host B cannot piggyback the acknowledgments ... 4 bytes of data over a TCP connection to Host B. In this same segment the acknowledgment number is necessarily 42.

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 21 views

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Kurose and Ross Edition 6 Exercise 3 Question R13 (Page No 287)
Visit the Selective Repeat Java applet at the companion Web site. Have the source send five packets, and then pause the animation before any of the five packets reach the destination. Then kill the first packet and resume ... what happens. Finally, try sending six packets. What happens? How selective repeat and go back-n is different?

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 10 views

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Kurose and Ross Edition 6 Exercise 3 Question R12 (Page No 286)
Visit the Go-Back-N Java applet at the companion Web site. Have the source send five packets, and then pause the animation before any of the five packets reach the destination. Then kill the first packet and ... destination and kill the first acknowledgment. Describe again what happens. Finally, try sending six packets. What happens?

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 15 views

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12

Kurose and Ross Edition 6 Exercise 3 Question R11 (Page No 286)
Suppose that the roundtrip delay between the sender and receiver is constant and known to the sender. Would a timer still be necessary for protocol rdt 3.0 as shown in the figure, assuming that packets can be lost? Explain.

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 19 views

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13

Kurose and Ross Edition 6 Exercise 3 Question R10 (Page No 286)
In our rdt protocols, why did we need to introduce timers?

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 25 views

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Kurose and Ross Edition 6 Exercise 3 Question R9 (Page No 286)
In our rdt protocols, why did we need to introduce sequence numbers?

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 20 views

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15

Kurose and Ross Edition 6 Exercise 3 Question R8 (Page No 286)
Suppose that a Web server runs in Host C on port 80. Suppose this Web server uses persistent connections and is currently receiving requests from two different Hosts, A and B. Are all of the requests being sent through the ... If they are being passed through different sockets, do both of the sockets have port 80? Discuss and explain.

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 7 views

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16

Kurose and Ross Edition 6 Exercise 3 Question R7 (Page No 286)
Suppose a process in Host C has a UDP socket with port number 6789. Suppose both Host A and Host B each send a UDP segment to Host C with destination port number 6789. Will both of these segments be directed to the same ... Host C? If so, how will the process at Host C know that these two segments originated from two different hosts?

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 7 views

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17

Kurose and Ross Edition 6 Exercise 3 Question R6 (Page No 286)
Is it possible for an application to enjoy reliable data transfer even when the application runs over UDP? If so, how?

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 17 views

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18

Kurose and Ross Edition 6 Exercise 3 Question R5 (Page No 286)
Why is it that voice and video traffic is often sent over TCP rather than UDP in today’s Internet? (Hint: The answer we are looking for has nothing to do with TCP’s congestion-control mechanism.)

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 5 views

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19

Kurose and Ross Edition 6 Exercise 3 Question R4 (Page No 286)
Describe why an application developer might choose to run an application over UDP rather than TCP.

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 23 views

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20

Kurose and Ross Edition 6 Exercise 3 Question R3 (Page No 286)
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 x and destination port number y. What are the source and destination port numbers for the segments traveling from Host B to Host A?

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 21 views

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21

Kurose and Ross Edition 6 Exercise 3 Question R2 (Page No 285)
Consider a planet where everyone belongs to a family of six, every family lives in its own house, each house has a unique address, and each person in a given house has a unique name. Suppose this planet has a mail ... protocol, does the mail service ever have to open the envelope and examine the letter in order to provide its service?

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 18 views

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22

Kurose and Ross Edition 6 Exercise 3 Question R1 (Page No 285)
Suppose the network layer provides the following service. The network layer in the source host accepts a segment of maximum size 1,200 bytes and a destination host address from the transport layer. The network layer then guarantees ... In your protocols, does the transport layer have to do anything in the core of the computer network?

asked Apr 18 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 5 views

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23

Kurose and Ross Edition 6 Exercise 2 Question P14 (Page No 174)
How does SMTP mark the end of a message body? How about HTTP? Can HTTP use the same method as SMTP to mark the end of a message body? Explain.

asked Apr 10 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 32 views

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24

Kurose and Ross Edition 6 Exercise 2 Question P13 (Page No 174)
What is the difference between MAIL FROM: in SMTP and From: in the mail message itself?

asked Apr 10 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 19 views

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25

Kurose and Ross Edition 6 Exercise 2 Question P3 (Page No 171)
Consider an HTTP client that wants to retrieve a Web document at a given URL. The IP address of the HTTP server is initially unknown. What transport and application-layer protocols besides HTTP are needed in this scenario?

asked Apr 10 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 23 views

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26

Kurose and Ross Edition 6 Exercise 2 Question P2 (Page No 171)
Read RFC 959 for FTP. List all of the client commands that are supported by the RFC.

asked Apr 10 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 9 views

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27

Kurose and Ross Edition 6 Exercise 2 Question P1 (Page No 171)
True or false? A user requests a Web page that consists of some text and three images. For this page, the client will send one request message and receive four response messages. Two distinct Web pages (for example, ... indicates when the object in the response was last modified. HTTP response messages never have an empty message body.

asked Apr 10 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 17 views

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28

Kurose and Ross Edition 6 Exercise 2 Question R20 (Page No 170)
Look over your received emails, and examine the header of a message sent from a user with a .edu email address. Is it possible to determine from the header the IP address of the host from which the message was sent? Do the same for a message sent from a Gmail account.

asked Apr 10 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 10 views

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29

Kurose and Ross Edition 6 Exercise 2 Question R19 (Page No 170)
Is it possible for an organization’s Web server and mail server to have exactly the same alias for a hostname (for example, $foo.com$)? What would be the type for the RR that contains the hostname of the mail server?

asked Apr 10 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 18 views

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30

Kurose and Ross Edition 6 Exercise 2 Question R18 (Page No 170)
From a user’s perspective, what is the difference between the download-and delete mode and the download-and-keep mode in POP3?

asked Apr 10 in Computer Networks by ajaysoni1924 Boss (10.1k points) | 20 views

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