Recent questions tagged computer-networks / GATE Overflow for GATE CSE

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1

Why is the bandwidth of the pre-established reserved link divided on multiple new connections?
I am reading Kurose Computer Networking book 8e, on page number 57, under 1.3.2 Circuit Switching Because it link has $4$ circuits, for each link used by the end-to-end ... in circuit switching affect the network's scalability compared to packet switching, where bandwidth is shared dynamically?

I am reading Kurose Computer Networking book 8e, on page number 57, under 1.3.2 Circuit SwitchingBecause it link has $4$ circuits, for each link used by the end-to-end co...

tbhaxor

26 views

tbhaxor asked 4 days ago

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1 answer

2

question on Supernetting
You have the following four contiguous networks: $10.0.0.0/24$ $10.0.1.0/24$ $10.0.2.0/24$ $10.0.3.0/24$ What is the supernet address that can represent all these networks?

You have the following four contiguous networks:$10.0.0.0/24$$10.0.1.0/24$$10.0.2.0/24$ $10.0.3.0/24$What is the supernet address that can represent all these networks?

Ayankahn

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Ayankahn asked Apr 15

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1 answer

3

Network Addressing
What is the Network ID for the network denoted by 192.168.242.5/20? a)192.168.242.0 b)192.168.240.0 c)192.168.226.0 d)192.168.192.0

What is the Network ID for the network denoted by 192.168.242.5/20? a)192.168.242.0b)192.168.240.0c)192.168.226.0d)192.168.192.0

Ayankahn

65 views

Ayankahn asked Apr 15

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4

Why does the transmission rate in the reserved link gets divided when more concurrent connections are established?

I am reading Kurose Computer Networking book 8e, on page number 57, under 1.3.2 Circuit SwitchingBecause it link has $4$ circuits, for each link used by the end-to-end co...

tbhaxor

49 views

tbhaxor asked Apr 7

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5

Link vs Channel in computer networking
While reading computer networking, I am confused between link and channel and seen people using this interchangeably (which often bugs me). Language written in books and forums A link refers to the most basic physical or logical connection between two devices. ... A can connect to B via Ethernet, and A can connect to C via RF. What do you think about this?

While reading computer networking, I am confused between link and channel and seen people using this interchangeably (which often bugs me).Language written in books and f...

tbhaxor

64 views

tbhaxor asked Apr 5

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1 answer

6

does ack sent by the reciver contains crc

arunnaik_0110

60 views

arunnaik_0110 asked Mar 30

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7

Channel utilisation
I am having problems calculating channel utilization. The question at hand reads as follows: An application using TCP and will send data in windows of 64000 bytes over a 100 Mbit/s link. The round-trip time is 20ms and transmission times can be neglected. What ... windows size / (Bandwidth * RTT) but I am unsure if this is the correct way. Any help would be greatly appreciated.

I am having problems calculating channel utilization. The question at hand reads as follows: An application using TCP and will send data in windows of 64000 bytes over a ...

Ger

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Ger asked Mar 25

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8

Computer Networks : Using DBA instead of LBA
Going through the concept of LBA (Limited Broadcasting) and DBA (Directed Broadcast Address), if i consider two cases Case 1 : when host A (10.1.2.3) want to send the packet to all the nodes of a DIFFERENT Network (say 11.0.0.0), in ... .255.255) in Case 2, why can't i just use DBA (Directed Broadcasting), making the Destination IP 10.255.255.255 ?

Going through the concept of LBA (Limited Broadcasting) and DBA (Directed Broadcast Address), if i consider two casesCase 1 : when host A (10.1.2.3) want to send the pack...

Yashdeep2000

137 views

Yashdeep2000 asked Mar 2

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0 answers

9

IPv4 Fragmentation
A packet has arrived in which the offset value is 100. Then what's the number of 1st Byte?

A packet has arrived in which the offset value is 100. Then what's the number of 1st Byte?

mridul_negi

130 views

mridul_negi asked Feb 25

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0 answers

10

#cn

Çșȇ ʛấẗẻ

74 views

Çșȇ ʛấẗẻ asked Feb 24

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11

Is throughput and link utilization is same. What are the other ways to ask efficiency?

HarshaVardhan1908

90 views

HarshaVardhan1908 asked Feb 22

2 votes

1 answer

12

GATE CSE 2024 | Set 2 | Question: 13
Node $\text{X}$ has a $\text{TCP}$ connection open to node $\text{Y}$. The packets from $\text{X}$ to $\text{Y}$ go through an intermediate $\text{IP}$ router $\mathrm{R}$. Ethernet switch $\mathrm{S}$ is the first switch on the network ... the $\text{MAC}$ address of $\mathrm{S}$ The destination $\text{MAC}$ address is the $\text{MAC}$ address of $\mathrm{Y}$

Node $\text{X}$ has a $\text{TCP}$ connection open to node $\text{Y}$. The packets from $\text{X}$ to $\text{Y}$ go through an intermediate $\text{IP}$ router $\mathrm...

Arjun

3.4k views

Arjun asked Feb 16

1 votes

1 answer

13

GATE CSE 2024 | Set 2 | Question: 18
Which of the following statements about $\text{IPv4}$ fragmentation is/are TRUE? The fragmentation of an $\text{IP}$ datagram is performed only at the source of the datagram The fragmentation of an $\text{IP}$ datagram ... of the datagram The reassembly of fragments is performed at all intermediate routers along the path from the source to the destination

Which of the following statements about $\text{IPv4}$ fragmentation is/are TRUE?The fragmentation of an $\text{IP}$ datagram is performed only at the sourc...

Arjun

2.7k views

Arjun asked Feb 16

1 votes

1 answer

14

GATE CSE 2024 | Set 2 | Question: 22
Which of the following fields of an $\text{IP}$ header is/are always modified by any router before it forwards the $\text{IP}$ packet? Source $\text{IP}$ Address Protocol Time to Live $\text{(TTL)}$ Header Checksum

Which of the following fields of an $\text{IP}$ header is/are always modified by any router before it forwards the $\text{IP}$ packet?Source $\text{IP}$ Addre...

Arjun

1.8k views

Arjun asked Feb 16

1 votes

3 answers

15

GATE CSE 2024 | Set 2 | Question: 28
Which one of the following $\text{CIDR}$ prefixes exactly represents the range of $\text{IP}$ addresses $10.12 .2 .0$ to $10.12 .3 .255$? $10.12 .2 .0 / 23$ $10.12 .2 .0 / 24$ $10.12 .0 .0 / 22$ $10.12 .2 .0 / 22$

Which one of the following $\text{CIDR}$ prefixes exactly represents the range of $\text{IP}$ addresses $10.12 .2 .0$ to $10.12 .3 .255$?$10.12 .2 .0 / 23$...

Arjun

2.1k views

Arjun asked Feb 16

2 votes

2 answers

16

GATE CSE 2024 | Set 2 | Question: 44
Consider a $\text{TCP}$ connection operating at a point of time with the congestion window of size $12$ $\text{MSS}$ (Maximum Segment Size), when a timeout occurs due to packet loss. Assuming that all the segments transmitted in the next ... Time) are acknowledged correctly, the congestion window size (in $MSS$) during the third $\text{RTT}$ will be __________.

Consider a $\text{TCP}$ connection operating at a point of time with the congestion window of size $12$ $\text{MSS}$ (Maximum Segment Size), when a timeout occurs due to ...

Arjun

1.7k views

Arjun asked Feb 16

2 votes

3 answers

17

GATE CSE 2024 | Set 2 | Question: 45
Consider an Ethernet segment with a transmission speed of $10^{8} \mathrm{bits} / \mathrm{sec}$ and a maximum segment length of $500$ meters. If the speed of propagation of the signal in the medium is $2 \times 10^{8} \mathrm{~meters} / \mathrm{sec}$, then the minimum frame size (in bits) required for collision detection is ___________.

Consider an Ethernet segment with a transmission speed of $10^{8} \mathrm{bits} / \mathrm{sec}$ and a maximum segment length of $500$ meters. If the speed of propagation ...

Arjun

1.6k views

Arjun asked Feb 16

3 votes

2 answers

18

GATE CSE 2024 | Set 1 | Question: 6
A user starts browsing a webpage hosted at a remote server. The browser opens a single TCP connection to fetch the entire webpage from the server. The webpage consists of a top-level index page with multiple embedded image objects. Assume that all caches (e.g., DNS cache, browser cache) are ... $\text{(ii), (iv), (i), (iii)}$ $\text{(iv), (ii), (i), (iii)}$

A user starts browsing a webpage hosted at a remote server. The browser opens a single TCP connection to fetch the entire webpage from the server. The webpage consists of...

Arjun

2.5k views

Arjun asked Feb 16

2 votes

1 answer

19

GATE CSE 2024 | Set 1 | Question: 19
$\mathrm{TCP}$ client $\mathrm{P}$ successfully establishes a connection to $\text{TCP}$ server $\mathrm{Q}$. Let $\text{N}_{P}$ denote the sequence number in the $\text{SYN}$ sent from $\mathrm{P}$ to $\mathrm{Q}$. Let $\text{N}_{Q}$ denote the ... $\text{N}_{P}$ The acknowledgement number $\text{N}_{Q}$ is equal to $\text{N}_{P}+1$

$\mathrm{TCP}$ client $\mathrm{P}$ successfully establishes a connection to $\text{TCP}$ server $\mathrm{Q}$. Let $\text{N}_{P}$ denote the sequence number in the $\te...

Arjun

1.8k views

Arjun asked Feb 16

2 votes

1 answer

20

GATE CSE 2024 | Set 1 | Question: 21
Which of the following fields is/are modified in the $\text{IP}$ header of a packet going out of a network address translation $\text{(NAT)}$ device from an internal network to an external network? Source $\text{IP}$ Destination $\text{IP}$ Header Checksum Total Length

Which of the following fields is/are modified in the $\text{IP}$ header of a packet going out of a network address translation $\text{(NAT)}$ device from an internal netw...

Arjun

2.1k views

Arjun asked Feb 16

0 votes

3 answers

21

GATE CSE 2024 | Set 1 | Question: 26
Consider a network path $\mathrm{P}-\mathrm{Q}-\mathrm{R}$ between nodes $\mathrm{P}$ and $\mathrm{R}$ via router $\mathrm{Q}$. Node $\mathrm{P}$ sends a file of size $10^6$ bytes to $\text{R}$ via this path by splitting the file into chunks of ... $3$ decimal places) at which $\mathrm{R}$ receives all the chunks of the file? $8.000$ $8.008$ $15.992$ $16.000$

Consider a network path $\mathrm{P}-\mathrm{Q}-\mathrm{R}$ between nodes $\mathrm{P}$ and $\mathrm{R}$ via router $\mathrm{Q}$. Node $\mathrm{P}$ sends a file of size $10...

Arjun

2.2k views

Arjun asked Feb 16

2 votes

2 answers

22

GATE CSE 2024 | Set 1 | Question: 48
Consider the entries shown below in the forwarding table of an $\text{IP}$ router. Each entry consists of an $\text{IP}$ prefix and the corresponding next hop router for packets whose destination $\text{IP}$ address matches the prefix. The notation " ... and $10.1.1.205$. The number of packets forwarded via the next hop router $\mathrm{R} 2$ is __________.

Consider the entries shown below in the forwarding table of an $\text{IP}$ router. Each entry consists of an $\text{IP}$ prefix and the corresponding next hop router for ...

Arjun

2.1k views

Arjun asked Feb 16

0 votes

1 answer

23

GATE CSE 2024 | Set 1 | Question: 55
Consider sending an $\text{IP}$ datagram of size $1420$ bytes (including $20$ bytes of $\text{IP}$ ... ) has an $\text{MTU}$ size of $360$ bytes. The number of fragments that would be delivered at the receiver is ____________.

Consider sending an $\text{IP}$ datagram of size $1420$ bytes (including $20$ bytes of $\text{IP}$ header) from a sender to a receiver over a path of two links with a rou...

Arjun

2.5k views

Arjun asked Feb 16

4 votes

2 answers

24

GO Classes Test Series 2024 | Mock GATE | Test 14 | Question: 11
Consider the following network, which consists of two routers (R1 and R2), two switches (S1 and S2), and four hosts (H1, H2, H3, and H4). Suppose H1 wants to send packet to H3, which of the following is ... address of R1 Packet leaving R1 will have destination mac address of R2 Packet leaving R2 will have destination mac address of S2

Consider the following network, which consists of two routers (R1 and R2), two switches (S1 and S2), and four hosts (H1, H2, H3, and H4).Suppose H1 wants to send packet t...

GO Classes

664 views

GO Classes asked Feb 5

4 votes

1 answer

25

GO Classes Test Series 2024 | Mock GATE | Test 14 | Question: 12
Consider the sender's view of the sequence numbers in Go-Back-N protocol. Suppose the first sequence number in the sender's window is $k$, and the last sequence number in the sender's window is $k+3$. Let a packet with sequence ... must have been sent. If $p_{k+2}$ is not sent, then $p_{k+1}$ must not have been sent.

Consider the sender's view of the sequence numbers in Go-Back-N protocol. Suppose the first sequence number in the sender's window is $k$, and the last sequence number in...

GO Classes

395 views

GO Classes asked Feb 5

5 votes

1 answer

26

GO Classes Test Series 2024 | Mock GATE | Test 14 | Question: 25
A host uses a variety of protocols to discover information about the network it is connected to. Which of the following statements are TRUE? To perform a DNS lookup, a host must first discover the IP address of its local ... another host in the same subnet, a host must first discover the MAC address of the destination host using ARP.

A host uses a variety of protocols to discover information about the network it is connected to. Which of the following statements are TRUE?To perform a DNS lookup, a hos...

GO Classes

707 views

GO Classes asked Feb 5

4 votes

1 answer

27

GO Classes Test Series 2024 | Mock GATE | Test 14 | Question: 38
Consider a sliding window protocol with a window size of $5$ using cumulative ACKs (and ACK is being sent for each segment). Assume that the retransmission timeout timer is long enough and timeout has not occurred for any ... after data packet 5 Data packet 3 was duplicated by the network ACK packet A3 was duplicated by the network

Consider a sliding window protocol with a window size of $5$ using cumulative ACKs (and ACK is being sent for each segment).Assume that the retransmission timeout timer i...

GO Classes

444 views

GO Classes asked Feb 5

4 votes

1 answer

28

GO Classes Test Series 2024 | Mock GATE | Test 14 | Question: 51
Consider the following forwarding table in a router that uses longest prefix matching to forward packets. Assume that 4-bit addressing is used. ... $X=0$ and $Y=00$ $X=01$ and $Y=00$ $X=010$ and $Y=00$ $X=00$ and $Y=0$

Consider the following forwarding table in a router that uses longest prefix matching to forward packets. Assume that 4-bit addressing is used.$$\begin{array}{c|c}\hline ...

GO Classes

394 views

GO Classes asked Feb 5

4 votes

1 answer

29

GO Classes Test Series 2024 | Mock GATE | Test 13 | Question: 22
An IP router implementing Classless Inter-domain Routing (CIDR) receives a packet with address $128.96.39.10.$ ... will be forwarded is __________. $\text{R}2$ $\text{R}3$ $\text{R}4$ $\text{R}6$

An IP router implementing Classless Inter-domain Routing (CIDR) receives a packet with address $128.96.39.10.$The router's routing table has the following entries:$$\begi...

GO Classes

401 views

GO Classes asked Jan 28

2 votes

1 answer

30

GO Classes Test Series 2024 | Mock GATE | Test 13 | Question: 50
Consider a laptop trying to access a file via HTTP from a server. The laptop knows its own IP address and the server's IP address. Below list the following messages that appear on the Laptop's network (in the order that they would occur), by listing the letter ... $a, e, c, d, g, c, b, f, c$

Consider a laptop trying to access a file via HTTP from a server. The laptop knows its own IP address and the server's IP address.Below list the following messages that a...

GO Classes

328 views

GO Classes asked Jan 28

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