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Recent questions tagged tcp

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121

#TCP_timers #tranport layer #computer network #RTO
If initial RTT is 30 sec and new RTT is 40 sec and alpha is0.1 then calculate next two RTO time.

Kinjalkkt asked in Computer Networks Oct 22, 2018

461 views

3 votes

1 answer

122

Congestion control
Consider the effect of using slow start on a line with 10 msec round trip time. The receiver window and the size of congestion window are set to 38 KB and 36 KB respectively. Sender side threshold is set to 18 KB. After 8 transmission a timeout occurs, after time out, the time taken to send first full window of 18 KB is ________ (in msec).

Shivangi Parashar 2 asked in Computer Networks Oct 16, 2018

by Shivangi Parashar 2

2.2k views

3 votes

3 answers

123

Transport layer
For a network which has maximum packet size is 256 bytes . lifetime of a packet is 20 sec and 8 bit sequence number . Find maximum data rate per connection

Jaggi asked in Computer Networks Oct 11, 2018

by Jaggi

2.6k views

2 votes

1 answer

124

Testbook Test Series: Computer Networks - Tcp
Which of the following is TRUE 1. A SYN segment can carry data,consumes no sequence number 2. A SYN+ACK segment can't carry data,but does consume one sequence number 3. An ACK segment , if carrying no data doesn't consume a sequence number

jatin khachane 1 asked in Computer Networks Oct 5, 2018

by jatin khachane 1

2.2k views

1 vote

1 answer

125

Doubt
UDP does not insert sequence numbers. The packets are expected to arrive as a continuous stream or they are dropped. What is the meaning of this line?(does it mean UDP discard out of order packets?)

soumayan bandhu asked in Computer Networks Sep 24, 2018

by soumayan bandhu

909 views

2 votes

2 answers

126

TCP 3-way-handshake

Sambhrant Maurya asked in Computer Networks Sep 23, 2018

by Sambhrant Maurya

642 views

1 vote

1 answer

127

sample question
If TCP round trip time is currently 20 ms and ACK comes in after 30 ms then what is the timeout period for next transmission . Use α=0.9 and β=2 I know that α is smoothening factor. what is meant by β?

vk_9_1_9 asked in Computer Networks Sep 21, 2018

505 views

1 vote

1 answer

128

Na462 asked in Computer Networks Sep 20, 2018

by Na462

628 views

0 votes

1 answer

129

TCP,UDP doubt
Is packets come to destination in order for both TCP and UDP?

soumayan bandhu asked in Computer Networks Sep 15, 2018

by soumayan bandhu

492 views

2 votes

1 answer

130

TCP/IP
The intermediate routers between source and destination do not need the following info in the IP header; a)Protocol b)Identification number c)Source IP d)IP version e)None of these

Sambhrant Maurya asked in Computer Networks Sep 13, 2018

by Sambhrant Maurya

964 views

2 votes

0 answers

131

TCP/IP
What is the minimum and maximum number of packets required to be exchanged for connection establishment, data transfer and connection termination in a TCP 3 way handshake?

Sambhrant Maurya asked in Computer Networks Sep 12, 2018

by Sambhrant Maurya

742 views

4 votes

1 answer

132

TestBook TCP
In a TCP connection, the initial sequence number at the client site is 1846. The client opens the connection, sends only one segment carrying 1200 bytes of data, and closes the connection. What is the value of the sequence number in SYN, DATA and FIN segment sent by the client? 1200, 3046, 4246 1846, 1200, 3046 1200, 1846, 3046 1846, 3046, 3046

Mk Utkarsh asked in Computer Networks Sep 9, 2018

1.5k views

0 votes

1 answer

133

Self Doubt
What is Port number for TCP,UDP,IGMP,ICMP ? this might be silly question but still wants some little discussion.

Nikhil Patil asked in Computer Networks Sep 1, 2018

by Nikhil Patil

549 views

0 votes

0 answers

134

Kurose and Ross Chapter 4th Network Layer Problem 16
Q: Suppose an application generates chunks of 40 bytes of data every 20 msec, and each chunk gets encapsulated in a TCP segment and then an IP datagram. What percentage of each datagram will be overhead, and what percentage will be application data? Please someone who knows explain also. Thanks in adv. - Madhav.

Phantom5 asked in Computer Networks Aug 31, 2018

1.9k views

2 votes

0 answers

135

CN_METest_TCP
I have a doubt here. Case 1: If we don't use time-stamp option in tcp, then the maximum segments that I can send in 1 TCP session is $2^{32}$ Since each segment size is 1460Bytes, maximum data that can be sent is $1460*2^{32}$ Bytes ( ... sequence number wrap around won't be a problem.Then in this case, what file size should we assume? is my analysis correct in both cases?

Ayush Upadhyaya asked in Computer Networks Aug 22, 2018

by Ayush Upadhyaya

736 views

3 votes

1 answer

136

CN_METest
I have a doubt here. When timeout occurs, the congestion windows size is 18MSS.and Till now total RTT before this timeout were 6. Now, my threshold will be set to 9MSS and congestion window will start from 1 MSS.So, now when I send 1MSS window and receive it's ack and then my window size changes to 2MSS, will this RTT be counted as 7th RTT or the 8th RTT?

Ayush Upadhyaya asked in Computer Networks Aug 22, 2018

by Ayush Upadhyaya

1.0k views

0 votes

0 answers

137

I'm getting trouble to solve this Computer Network Numerical #Congestion #Packetization
Quoted Question: "Suppose you have a network with an RTT of 100ms and a packetization delay of 1ms for a maximum sized TCP segment of 1.4kB. You are using TCP Tahoe. The initial congestion window is 2 ... ; is the time before the first data byte is sent. Do not consider teardown." Thanks in advance.

Phantom5 asked in Computer Networks Aug 21, 2018

694 views

0 votes

1 answer

138

Computer network
we know that router is a 3 layer device (upto network layer)....then how it runs RIP,OSPF protocol for routing protocol ????i mean routing protocol runs on transport layer(because they uses UDP/TCP).....how it is possible??

Ravi prakash pandey asked in Computer Networks Aug 14, 2018

by Ravi prakash pandey

286 views

3 votes

2 answers

139

TCP acknowledgement number
An ACK number of $1000$ in TCP always means that $999$ bytes have been successfully received $1000$ bytes have been successfully received $1001$ bytes have been successfully received None of the above

bts asked in Computer Networks Jun 18, 2018

by bts

774 views

1 vote

1 answer

140

Self doubt - TCP
True or False An acknowledgement by TCP sender means that data is delivered to the application process.

Harsh Kumar asked in Computer Networks Jun 16, 2018

282 views

0 votes

0 answers

141

TCP types (importance for GATE)
Should I really remember the differences between (or may really care about) the Tahoe TCP and Reno TCP for GATE ?

Harsh Kumar asked in Computer Networks Jun 15, 2018

309 views

3 votes

2 answers

142

TCP - Stanford Lectures
In one of the quizes, they asked the following question : "A server typically listens for TCP connections on a particular port (e.g. 80 for HTTP or 22 for SSH). Which fields can the server use to distinguish packets for a particular ... address from the packet received from the client... (After all, this destination IP address corresponds to the Server itself !).

Harsh Kumar asked in Computer Networks Jun 13, 2018

925 views

1 vote

3 answers

143

tcp congestion control
i have a self doubt that till now i solve the TCP question where the sender has $1\hspace{0.1cm}mss$ at starting so during time out generally reduced the senders window size to $1 \hspace{0.1cm}mss$ ... sender size i.e we will put it down to $1 \hspace{0.1cm}mss$ or to $2\hspace{0.1cm}mss$ .........

eyeamgj asked in Computer Networks May 27, 2018

764 views

3 votes

2 answers

144

TCP Connection
"TCP connection is logical, therefore TCP can be connection oriented protocol" Wha is meaning of logical connection? Can u discuss brief above two lines?

srestha asked in Computer Networks Mar 15, 2018

900 views

4 votes

2 answers

145

Test Series Question
Consider the following statements: S1: The size of TCP receiver window never change throughout the duration of the connection. S2: Suppose host A is sending a large file to host B over a TCP connection. The number of unacknowledged bytes that host A send cannot exceed the size of ... is false 2. S1 is false but S2 is true 3. Both S1 and S2 is true 4. Neither S1 nor S2 is true

anonymous asked in Computer Networks Mar 14, 2018

by anonymous

481 views

1 vote

0 answers

146

TCP question
Consider two TCP senders $T_{1}$, $T_{2}$ each of them is connected with a different line to a router whose capacity is $9000$ $bytes$. The bandwidth of each of these lines is infinite and the delay of each TCP sender to the router is $11$ ... I thought is 2000kbps / 21Mbps + 11msec =.. After the other tcp sender starts to send data the shared common line will be 21Mbps/2

JakeSmT asked in Computer Networks Mar 12, 2018

800 views

32 votes

6 answers

147

GATE CSE 2018 | Question: 25
Consider a long-lived $\text{TCP}$ session with an end-to-end bandwidth of $1\; \text{Gbps}\; (=10^9$ bits-per-second$).$ The session starts with a sequence number of $1234$. The minimum time (in seconds, rounded to the closet integer) before this sequence number can be used again is _________.

gatecse asked in Computer Networks Feb 14, 2018

21.3k views

37 votes

9 answers

148

GATE CSE 2018 | Question: 14
Consider the following statements regarding the slow start phase of the TCP congestion control algorithm. Note that cwnd stands for the TCP congestion window and MSS window denotes the Maximum Segments Size: The cwnd increases by $2$ MSS on every successful acknowledgment The cwnd ... true Only $\text{(iv)}$ is true Only $\text{(i)}$ and $\text{(iv)}$ are true

gatecse asked in Computer Networks Feb 14, 2018

23.0k views

3 votes

3 answers

149

Computer Networks
Do all the TCP segments travel through same path once the connection is established ?

Arunav Khare asked in Computer Networks Feb 12, 2018

by Arunav Khare

718 views

3 votes

1 answer

150

Maximum Segment Size (MSS in TCP) vs Maximum Transmissible Unit (MTU in Data Link)
It is known that any network can only transmit data packet size equal to (or less than) MTU allowed in the network. If that is the case, and if we have a Path MTU discovery in place, why is ... ) than MTU, will only burden Network Layer with fragmentation overhead. Is there any significant advantage of using MSS ?

Arunav Khare asked in Computer Networks Feb 6, 2018

by Arunav Khare

1.0k views

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Recent questions tagged tcp