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Recent questions tagged computer-networks
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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
41
views
Ger
asked
3 days
ago
Computer Networks
computer-networks
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0
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0
answers
2
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
110
views
Yashdeep2000
asked
Mar 2
Computer Networks
computer-networks
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0
votes
0
answers
3
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
103
views
mridul_negi
asked
Feb 25
Computer Networks
computer-networks
fragmentation
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–
0
votes
0
answers
4
#cn
Çșȇ ʛấẗẻ
58
views
Çșȇ ʛấẗẻ
asked
Feb 24
Computer Networks
computer-networks
subnetting
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0
votes
0
answers
5
Is throughput and link utilization is same. What are the other ways to ask efficiency?
HarshaVardhan1908
78
views
HarshaVardhan1908
asked
Feb 22
Computer Networks
computer-networks
+
–
2
votes
1
answer
6
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
3.0k
views
Arjun
asked
Feb 16
Computer Networks
gatecse2024-set2
computer-networks
multiple-selects
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–
1
votes
1
answer
7
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
2.5k
views
Arjun
asked
Feb 16
Computer Networks
gatecse2024-set2
computer-networks
multiple-selects
+
–
1
votes
1
answer
8
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
1.6k
views
Arjun
asked
Feb 16
Computer Networks
gatecse2024-set2
computer-networks
multiple-selects
+
–
1
votes
1
answer
9
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
1.7k
views
Arjun
asked
Feb 16
Computer Networks
gatecse2024-set2
computer-networks
+
–
1
votes
1
answer
10
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
1.5k
views
Arjun
asked
Feb 16
Computer Networks
gatecse2024-set2
numerical-answers
computer-networks
+
–
2
votes
1
answer
11
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
1.3k
views
Arjun
asked
Feb 16
Computer Networks
gatecse2024-set2
numerical-answers
computer-networks
+
–
3
votes
2
answers
12
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
2.3k
views
Arjun
asked
Feb 16
Computer Networks
gatecse2024-set1
computer-networks
+
–
2
votes
1
answer
13
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
1.7k
views
Arjun
asked
Feb 16
Computer Networks
gatecse2024-set1
multiple-selects
computer-networks
tcp
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–
2
votes
1
answer
14
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
1.9k
views
Arjun
asked
Feb 16
Computer Networks
gatecse2024-set1
multiple-selects
computer-networks
+
–
0
votes
2
answers
15
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
1.8k
views
Arjun
asked
Feb 16
Computer Networks
gatecse2024-set1
computer-networks
+
–
2
votes
2
answers
16
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
1.8k
views
Arjun
asked
Feb 16
Computer Networks
gatecse2024-set1
numerical-answers
computer-networks
+
–
0
votes
1
answer
17
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
2.2k
views
Arjun
asked
Feb 16
Computer Networks
gatecse2024-set1
numerical-answers
computer-networks
+
–
4
votes
2
answers
18
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
599
views
GO Classes
asked
Feb 5
Computer Networks
goclasses2024-mockgate-14
computer-networks
packet-switching
multiple-selects
1-mark
+
–
4
votes
1
answer
19
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
342
views
GO Classes
asked
Feb 5
Computer Networks
goclasses2024-mockgate-14
computer-networks
go-back-n
1-mark
+
–
5
votes
1
answer
20
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
603
views
GO Classes
asked
Feb 5
Computer Networks
goclasses2024-mockgate-14
computer-networks
ip-address
multiple-selects
1-mark
+
–
4
votes
1
answer
21
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
400
views
GO Classes
asked
Feb 5
Computer Networks
goclasses2024-mockgate-14
computer-networks
tcp
multiple-selects
2-marks
+
–
4
votes
0
answers
22
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.$$\begin{array}{c|c}\hline ...
GO Classes
330
views
GO Classes
asked
Feb 5
Computer Networks
goclasses2024-mockgate-14
computer-networks
ip-packet
multiple-selects
2-marks
+
–
4
votes
1
answer
23
GO Classes Test Series 2024 | Mock GATE | Test 13 | Question: 22
An IP router implementing Classless Inter-domain Routing (CIDR) receives a packet with address $128.96.39.10.$ ... will be forwarded is __________. $\text{R}2$ $\text{R}3$ $\text{R}4$ $\text{R}6$
An IP router implementing Classless Inter-domain Routing (CIDR) receives a packet with address $128.96.39.10.$The router's routing table has the following entries:$$\begi...
GO Classes
341
views
GO Classes
asked
Jan 28
Computer Networks
goclasses2024-mockgate-13
goclasses
computer-networks
routing
subnetting
1-mark
+
–
2
votes
1
answer
24
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
277
views
GO Classes
asked
Jan 28
Computer Networks
goclasses2024-mockgate-13
goclasses
computer-networks
http
2-marks
+
–
8
votes
2
answers
25
GO Classes Test Series 2024 | Mock GATE | Test 13 | Question: 51
A TCP connection has been established between hosts $\text{A}$ and $\text{B. A}$ receives a packet from $\text{B}$ with the following field values shown below: Sequence: $1001$ Acknowledgment: $5001$ Window size: $3000$ [ ... Payload Size: $1000]$ Sequence: $8001$ Acknowledgment: $1053$ Window size: $2000$ [TCP Payload Size: $1000]$
A TCP connection has been established between hosts $\text{A}$ and $\text{B. A}$ receives a packet from $\text{B}$ with the following field values shown below:Sequence: $...
GO Classes
767
views
GO Classes
asked
Jan 28
Computer Networks
goclasses2024-mockgate-13
goclasses
computer-networks
tcp
multiple-selects
2-marks
+
–
7
votes
1
answer
26
GO Classes Test Series 2024 | Mock GATE | Test 13 | Question: 52
Consider a sliding window protocol with a window size of $5$ using cumulative ACKs (and ACK is being sent for each segment). Retransmissions: retransmissions occur under two conditions: Reception of three duplicate ACKs (that is, three identical ... first retransmitted (expressed in terms of msec after $t=0 )?$ $23$ $42$ $43$ $102$
Consider a sliding window protocol with a window size of $5$ using cumulative ACKs (and ACK is being sent for each segment).Retransmissions: retransmissions occur under t...
GO Classes
802
views
GO Classes
asked
Jan 28
Computer Networks
goclasses2024-mockgate-13
goclasses
computer-networks
sliding-window
2-marks
+
–
2
votes
0
answers
27
why is there no reduction in performance of stop and wait ARQ for satellite connections in comparison with other sliding window protocols?
pcla
133
views
pcla
asked
Jan 27
Computer Networks
computer-networks
stop-and-wait
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–
0
votes
1
answer
28
Test Series
Even through B's browser has only viewed the first 80 bytes, its stack has received up to byte 600 in sequence from A. What will be the ACK and window in TCP header that B next sends to A? Note: If ACK is X and window in TCP header is Y then write answer as X+Y.
Even through B's browser has only viewed the first 80 bytes,its stack has received up to byte 600 in sequence from A.What will be the ACK and window in TCP header that B ...
Neeraj patel
118
views
Neeraj patel
asked
Jan 23
Computer Networks
computer-networks
test-series
tcp
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–
2
votes
1
answer
29
GO Classes Test Series 2024 | Mock GATE | Test 12 | Question: 10
Which of the following is/are true in context of error control? A CRC of length $\text{R}$ is calculated over a message of length $\text{M}$ ... code set has a minimum Hamming distance of two. A larger Hamming distance is needed to detect errors than to correct errors.
Which of the following is/are true in context of error control?A CRC of length $\text{R}$ is calculated over a message of length $\text{M}$ bits. The CRC will detect all ...
GO Classes
670
views
GO Classes
asked
Jan 21
Computer Networks
goclasses2024-mockgate-12
goclasses
computer-networks
hamming-code
multiple-selects
1-mark
+
–
4
votes
0
answers
30
GO Classes Test Series 2024 | Mock GATE | Test 12 | Question: 11
Host $\text{A}$ and $\text{B}$ are behind different NATs. $\text{A's}$ private IP address is $192.168.1.11,$ and $\text{B's}$ private IP is $10.1.1.12.$ The public IP of the NAT box connected to $\text{A}$ is $4.3.2.1$ and ... destination IP address in the packet leaving $\text{A}?$ $4.3.2.1$ $2.2.2.2$ $10.1.1.12$ $1.2.3.4$
Host $\text{A}$ and $\text{B}$ are behind different NATs. $\text{A's}$ private IP address is $192.168.1.11,$ and $\text{B's}$ private IP is $10.1.1.12.$ The public IP of ...
GO Classes
506
views
GO Classes
asked
Jan 21
Computer Networks
goclasses2024-mockgate-12
goclasses
computer-networks
network-addressing
1-mark
+
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