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Webpage for Computer Networks:
Recent questions tagged computer-networks
0
votes
1
answer
2881
Q:- why it is said that one of the key characteristic of distance vector routing is knowledge about the entire network while one of the key characteristic of link state routing is knowledge about the neighborhood ??
it's question of adaptive routing protocol of computer network.
AJAY KUMAR ARYAN
886
views
AJAY KUMAR ARYAN
asked
Jul 26, 2015
Computer Networks
computer-networks
+
–
0
votes
2
answers
2882
UGC NET CSE | June 2013 | Part 3 | Question: 55
Given code word $1110001010$ is to be transmitted with even parity check bit. The encoded word to be transmitted for this code is $11100010101$ $11100010100$ $1110001010$ $111000101$
Given code word $1110001010$ is to be transmitted with even parity check bit. The encoded word to be transmitted for this code is$11100010101$$11100010100$$1110001010$$11...
rpdhakad
3.7k
views
rpdhakad
asked
Jul 12, 2015
Computer Networks
computer-networks
ugcnetcse-june2013-paper3
encoding
+
–
0
votes
3
answers
2883
UGC NET CSE | December 2013 | Part 2 | Question: 43
Which of the following is widely used inside the telephone system for long-haul data traffic? ISDN ATM Frame Relay ISTN
Which of the following is widely used inside the telephone system for long-haul data traffic?ISDNATMFrame RelayISTN
Shimpy Goyal
3.0k
views
Shimpy Goyal
asked
Jun 26, 2015
Computer Networks
ugcnetcse-dec2013-paper2
computer-networks
+
–
3
votes
1
answer
2884
UGC NET CSE | June 2013 | Part 2 | Question: 33
Using data p=3, q=11, n=pq, d=7 in RSA algorithm find the cipher text of the given plain text SUZANNE BUTAEEZ SUZANNE XYZABCD ABCDXYZ
Using data p=3, q=11, n=pq, d=7 in RSA algorithm find the cipher text of the given plain text SUZANNEBUTAEEZSUZANNEXYZABCDABCDXYZ
Shimpy Goyal
10.9k
views
Shimpy Goyal
asked
Jun 25, 2015
Computer Networks
computer-networks
network-security
rsa
ugcnetcse-june2013-paper2
+
–
0
votes
5
answers
2885
how many bits fit in a cable
A 100 Km long cable runs at 154 Mbps data rate. The prop speed in the cable is 2/3 of light. how many bits fit in the cable ? 1) 772 2) 700 3) 782 4) 770
A 100 Km long cable runs at 154 Mbps data rate. The prop speed in the cable is 2/3 of light. how many bits fit in the cable ?1) 7722) 7003) 7824) 770
Pradyumna Paralikar
6.5k
views
Pradyumna Paralikar
asked
Apr 16, 2015
Computer Networks
computer-networks
tanenbaum
+
–
1
votes
1
answer
2886
propagation delay
Two hosts are connected via a packet switch with 107 bits per second links. Each link has a propagation delay of 20 microseconds. The switch begins forwarding a packet 35 microseconds after it receives the same. If 100 bits of data are to be transmitted ... between the transmission of the first bit of data and the reception of the last bit of the data in microseconds is _____.
Two hosts are connected via a packet switch with 107 bits per second links. Each link has a propagation delay of 20 microseconds. The switch begins forwarding a packet 35...
resuscitate
1.9k
views
resuscitate
asked
Mar 14, 2015
Computer Networks
computer-networks
network-switching
+
–
46
votes
5
answers
2887
GATE CSE 2015 Set 3 | Question: 38
In the network $200.10.11.144/27$, the $\text{fourth}$ octet (in decimal) of the last $\text{IP}$ address of the network which can be assigned to a host is _______.
In the network $200.10.11.144/27$, the $\text{fourth}$ octet (in decimal) of the last $\text{IP}$ address of the network which can be assigned to a host is _______.
go_editor
16.1k
views
go_editor
asked
Feb 15, 2015
Computer Networks
gatecse-2015-set3
computer-networks
subnetting
normal
numerical-answers
+
–
106
votes
11
answers
2888
GATE CSE 2015 Set 3 | Question: 36
Two hosts are connected via a packet switch with $10^7$ bits per second links. Each link has a propagation delay of $20$ microseconds. The switch begins forwarding a packet $35$ microseconds after it receives the same. If $10000$ bits of ... between the transmission of the first bit of data and the reception of the last bit of the data in microseconds is ______.
Two hosts are connected via a packet switch with $10^7$ bits per second links. Each link has a propagation delay of $20$ microseconds. The switch begins forwarding a pack...
go_editor
32.6k
views
go_editor
asked
Feb 15, 2015
Computer Networks
gatecse-2015-set3
computer-networks
normal
numerical-answers
network-switching
+
–
47
votes
10
answers
2889
GATE CSE 2015 Set 3 | Question: 28
Consider a network connecting two systems located $8000$ $\text{Km}$ apart. The bandwidth of the network is $500 \times 10^6$ $\text{bits}$ per second. The propagation speed of the media is $4 \times 10^6$ $\text{meters}$ per ... . Assume that processing delays at nodes are negligible. Then, the minimum size in bits of the sequence number field has to be ______.
Consider a network connecting two systems located $8000$ $\text{Km}$ apart. The bandwidth of the network is $500 \times 10^6$ $\text{bits}$ per second. The propagation sp...
go_editor
14.4k
views
go_editor
asked
Feb 15, 2015
Computer Networks
gatecse-2015-set3
computer-networks
sliding-window
normal
numerical-answers
+
–
41
votes
4
answers
2890
GATE CSE 2015 Set 3 | Question: 22
Consider the following statements. TCP connections are full duplex TCP has no option for selective acknowledgement TCP connections are message streams Only I is correct Only I and III are correct Only II and III are correct All of I, II and III are correct
Consider the following statements.TCP connections are full duplexTCP has no option for selective acknowledgementTCP connections are message streamsOnly I is correctOnly I...
go_editor
12.2k
views
go_editor
asked
Feb 14, 2015
Computer Networks
gatecse-2015-set3
computer-networks
tcp
normal
+
–
30
votes
8
answers
2891
GATE CSE 2015 Set 3 | Question: 6
Consider a CSMA/CD network that transmits data at a rate of $100\;\textsf{Mbps}\; (10^8\;\text{bits}$ per second) over a $1\;\textsf{km}$ (kilometre) cable with no repeaters. If the minimum frame size required for this network is $1250\;\text{bytes},$ What is the signal speed $\textsf{(km/sec)}$ in the cable? $8000$ $10000$ $16000$ $20000$
Consider a CSMA/CD network that transmits data at a rate of $100\;\textsf{Mbps}\; (10^8\;\text{bits}$ per second) over a $1\;\textsf{km}$ (kilometre) cable with no repeat...
go_editor
13.8k
views
go_editor
asked
Feb 14, 2015
Computer Networks
gatecse-2015-set3
computer-networks
congestion-control
csma-cd
normal
+
–
36
votes
6
answers
2892
GATE CSE 2015 Set 1 | Question: 53
Suppose that the stop-and-wait protocol is used on a link with a bit rate of $64$ $\text{kilobits}$ per second and $20$ $\text{milliseconds}$ propagation delay. Assume that the transmission time for the acknowledgment and the processing time ... . Then the minimum frame size in bytes to achieve a link utilization of at least $50$ $\text{%}$ is_________________.
Suppose that the stop-and-wait protocol is used on a link with a bit rate of $64$ $\text{kilobits}$ per second and $20$ $\text{milliseconds}$ propagation delay. Assume th...
makhdoom ghaya
26.1k
views
makhdoom ghaya
asked
Feb 13, 2015
Computer Networks
gatecse-2015-set1
computer-networks
stop-and-wait
normal
numerical-answers
+
–
76
votes
9
answers
2893
GATE CSE 2015 Set 2 | Question: 52
$\text{Host A}$ sends a $\text{UDP}$ datagram containing $8880\text{ bytes}$ of user data to $\text{host B}$ over an $\text{Ethernet LAN}.$ Ethernet frames may carry data up to $1500\text{ bytes (i.e. MTU = 1500 bytes)}.$ Size of $\text{UDP}$ ... be the contents of offset field in the last fragment? $6$ and $925$ $6$ and $7400$ $7$ and $1110$ $7$ and $8880$
$\text{Host A}$ sends a $\text{UDP}$ datagram containing $8880\text{ bytes}$ of user data to $\text{host B}$ over an $\text{Ethernet LAN}.$ Ethernet frames may carry data...
go_editor
25.4k
views
go_editor
asked
Feb 13, 2015
Computer Networks
gatecse-2015-set2
computer-networks
ip-packet
normal
+
–
45
votes
9
answers
2894
GATE CSE 2015 Set 1 | Question: 29
Consider a LAN with four nodes $S_1, S_2, S_3,$ and $S_4$. Time is divided into fixed-size slots, and a node can begin its transmission only at the beginning of a slot. A collision is said to have occurred if more than ... respectively. The probability of sending a frame in the first slot without any collision by any of these four stations is__________________.
Consider a LAN with four nodes $S_1, S_2, S_3,$ and $S_4$. Time is divided into fixed-size slots, and a node can begin its transmission only at the beginning of a slot. A...
makhdoom ghaya
13.3k
views
makhdoom ghaya
asked
Feb 13, 2015
Computer Networks
gatecse-2015-set1
computer-networks
normal
numerical-answers
congestion-control
+
–
21
votes
3
answers
2895
GATE CSE 2015 Set 1 | Question: 21
Suppose that everyone in a group on $N$ people wants to communicate secretly with the $(\text{N - 1})$ others using symmetric Key cryptographic system. The communication between any two person should not be decodable by the others in the group. The numbers of keys required ... satisfy the confidentiality requirement is $2N$ $N(N-1)$ $\dfrac{N(N-1)}{2}$ $(N-1)^{2}$
Suppose that everyone in a group on $N$ people wants to communicate secretly with the $(\text{N - 1})$ others using symmetric Key cryptographic system. The communication ...
makhdoom ghaya
7.6k
views
makhdoom ghaya
asked
Feb 13, 2015
Computer Networks
gatecse-2015-set1
computer-networks
network-security
normal
out-of-gate-syllabus
+
–
35
votes
7
answers
2896
GATE CSE 2015 Set 1 | Question: 22
Which of the following fields of an IP header is NOT modified by a typical IP router? Check sum Source address Time to Live (TTL) Length
Which of the following fields of an IP header is NOT modified by a typical IP router?Check sumSource addressTime to Live (TTL)Length
makhdoom ghaya
10.0k
views
makhdoom ghaya
asked
Feb 13, 2015
Computer Networks
gatecse-2015-set1
computer-networks
ip-packet
easy
+
–
47
votes
9
answers
2897
GATE CSE 2015 Set 1 | Question: 19
Suppose two hosts use a TCP connection to transfer a large file. Which of the following statements is/are FALSE with respect to the TCP connection? If the sequence number of a segment is $m,$ then the sequence number of the subsequent segment is always ... always less than or equal to the advertised window. III only I and III only I and IV only II and IV only
Suppose two hosts use a TCP connection to transfer a large file. Which of the following statements is/are FALSE with respect to the TCP connection?If the sequence number ...
makhdoom ghaya
18.7k
views
makhdoom ghaya
asked
Feb 12, 2015
Computer Networks
gatecse-2015-set1
computer-networks
tcp
normal
+
–
36
votes
2
answers
2898
GATE CSE 2015 Set 1 | Question: 17
In one of the pairs of protocols given below , both the protocols can use multiple $\textsf{TCP}$ connections between the same client and the server. Which one is that? $\textsf{HTTP, FTP}$ $\textsf{HTTP, TELNET}$ $\textsf{FTP, SMTP}$ $\textsf{HTTP, SMTP}$
In one of the pairs of protocols given below , both the protocols can use multiple $\textsf{TCP}$ connections between the same client and the server. Which one is that?$\...
makhdoom ghaya
13.9k
views
makhdoom ghaya
asked
Feb 12, 2015
Computer Networks
gatecse-2015-set1
computer-networks
network-protocols
normal
+
–
26
votes
5
answers
2899
GATE CSE 2015 Set 2 | Question: 41
Consider the following routing table at an IP router: ... $\text{i-b, ii-c, iii-d, iv-e}$ $\text{i-b, ii-c, iii-e, iv-d}$
Consider the following routing table at an IP router:$$\begin{array}{|l|l|l|} \hline \textbf {Network No} & \textbf {Net Mask} & \textbf{Next Hop} \\\hline \text {128.96...
go_editor
14.1k
views
go_editor
asked
Feb 12, 2015
Computer Networks
gatecse-2015-set2
computer-networks
subnetting
easy
+
–
70
votes
5
answers
2900
GATE CSE 2015 Set 2 | Question: 34
Assume that the bandwidth for a $\text{TCP}$ connection is $1048560$ bits/sec. Let $\alpha$ be the value of RTT in milliseconds (rounded off to the nearest integer) after which the $\text{TCP}$ window scale option is needed. Let $\beta$ be the maximum possible ... $^{16}$ $500$ milliseconds, $65535$ $\times $2$^{14}$ $500$ milliseconds, $65535$ $\times $2$^{16}$
Assume that the bandwidth for a $\text{TCP}$ connection is $1048560$ bits/sec. Let $\alpha$ be the value of RTT in milliseconds (rounded off to the nearest integer) afte...
go_editor
27.6k
views
go_editor
asked
Feb 12, 2015
Computer Networks
gatecse-2015-set2
computer-networks
difficult
tcp
+
–
27
votes
4
answers
2901
GATE CSE 2015 Set 2 | Question: 20
Identify the correct order in which a server process must invoke the function calls accept, bind, listen, and recv according to UNIX socket API. $\textsf{listen, accept, bind, recv}$ $\textsf{bind, listen, accept, recv}$ $\textsf{bind, accept, listen, recv}$ $\textsf{accept, listen, bind, recv}$
Identify the correct order in which a server process must invoke the function calls accept, bind, listen, and recv according to UNIX socket API.$\textsf{listen, accept, b...
go_editor
9.6k
views
go_editor
asked
Feb 12, 2015
Computer Networks
gatecse-2015-set2
computer-networks
sockets
easy
+
–
36
votes
4
answers
2902
GATE CSE 2015 Set 2 | Question: 8
A link has transmission speed of $10^6$ bits/sec. It uses data packets of size $1000$ $\text{bytes}$ each. Assume that the acknowledgment has negligible transmission delay and that its propagation delay is the same as the data propagation delay. ... $\text{%}$. The value of the one way propagation delay (in milliseconds) is_____.
A link has transmission speed of $10^6$ bits/sec. It uses data packets of size $1000$ $\text{bytes}$ each. Assume that the acknowledgment has negligible transmission dela...
go_editor
11.8k
views
go_editor
asked
Feb 12, 2015
Computer Networks
gatecse-2015-set2
computer-networks
mac-protocol
stop-and-wait
normal
numerical-answers
+
–
1
votes
3
answers
2903
Sliding window size?
In sliding window protocol, assume a 3-bit sequence number field. A and B have windows, which has 3-bit sequence number. If A sends 3 frames and waits for all the 3 acknowledgments until the timer expires. Which of the following "could not be" the sender's "window ... . But ACK's send by receivers may be lost. a. 4 b. 7 c. 6 d. 5 answer is given as 4.
In sliding window protocol, assume a 3-bit sequence number field. A and B have windows, which has 3-bit sequence number. If A sends 3 frames and waits for all the 3 ackno...
Vikrant Singh
5.2k
views
Vikrant Singh
asked
Jan 29, 2015
Computer Networks
sliding-window
computer-networks
+
–
6
votes
2
answers
2904
In P-persistent CSMA network there are 5 systems in a slot. The probability of station not transmitting the data is 0.6. Only two stations should transmit the data to avoid collision. What is the probability that channel is collision free?
In P-persistent CSMA network there are 5 systems in a slot. The probability of station not transmitting the data is 0.6. Only two stations should transmit the data to avo...
Vikrant Singh
4.4k
views
Vikrant Singh
asked
Jan 29, 2015
Computer Networks
computer-networks
csma-cd
+
–
1
votes
1
answer
2905
CRC can detect all bursts of upto m errors if generator polynomial G(x) is of degree?
Vikrant Singh
1.9k
views
Vikrant Singh
asked
Jan 22, 2015
Computer Networks
crc-polynomial
computer-networks
+
–
0
votes
2
answers
2906
TCP connection
Suppose a client C repeatedly connects via TCP to a given port on a server S, and that each time it is C that initiates the close. If time-wait state lasts for 60 seconds, then how many TCP connections a second can 'C' make with all available ports? Assume client port are in the range of 1024 to 5119. A) 70 per sec B)10 per sec C) 13 per sec D) 100 per sec
Suppose a client C repeatedly connects via TCP to a given port on a server S, and that each time it is C that initiates the close. If time-wait state lasts for 60 seconds...
tushark
1.4k
views
tushark
asked
Nov 4, 2014
Computer Networks
computer-networks
tcp
+
–
48
votes
7
answers
2907
GATE IT 2005 | Question: 85b
Consider a simple graph with unit edge costs. Each node in the graph represents a router. Each node maintains a routing table indicating the next hop router to be used to relay a packet to its destination and the cost of the path to the destination through that router. Initially, the ... $(t + 100)$ is : $>100$ but finite $\infty$ $3$ $>3$ and $\leq 100$
Consider a simple graph with unit edge costs. Each node in the graph represents a router. Each node maintains a routing table indicating the next hop router to be used to...
Ishrat Jahan
14.7k
views
Ishrat Jahan
asked
Nov 3, 2014
Computer Networks
gateit-2005
computer-networks
routing
normal
+
–
23
votes
4
answers
2908
GATE IT 2005 | Question: 85a
Consider a simple graph with unit edge costs. Each node in the graph represents a router. Each node maintains a routing table indicating the next hop router to be used to relay a packet to its destination and the cost of the path to the destination through that router. Initially, ...
Consider a simple graph with unit edge costs. Each node in the graph represents a router. Each node maintains a routing table indicating the next hop router to be used to...
Ishrat Jahan
5.2k
views
Ishrat Jahan
asked
Nov 3, 2014
Computer Networks
gateit-2005
computer-networks
routing
normal
+
–
27
votes
3
answers
2909
GATE IT 2005 | Question: 79
Suppose that two parties $A$ and $B$ wish to setup a common secret key (D-H key) between themselves using the Diffie-Hellman key exchange technique. They agree on $7$ as the modulus and $3$ as the primitive root. Party $A$ chooses $2$ and party $B$ chooses $5$ as their respective secrets. Their D-H key is $3$ $4$ $5$ $6$
Suppose that two parties $A$ and $B$ wish to setup a common secret key (D-H key) between themselves using the Diffie-Hellman key exchange technique. They agree on $7$ as ...
Ishrat Jahan
6.9k
views
Ishrat Jahan
asked
Nov 3, 2014
Computer Networks
gateit-2005
computer-networks
network-security
normal
out-of-gate-syllabus
+
–
27
votes
3
answers
2910
GATE IT 2005 | Question: 78
Consider the following message $M = 1010001101$. The cyclic redundancy check (CRC) for this message using the divisor polynomial $x^5+x^4+x^2+1$ is : $01110$ $01011$ $10101$ $10110$
Consider the following message $M = 1010001101$. The cyclic redundancy check (CRC) for this message using the divisor polynomial $x^5+x^4+x^2+1$ is :$01110$$01011$$10101$...
Ishrat Jahan
19.4k
views
Ishrat Jahan
asked
Nov 3, 2014
Computer Networks
gateit-2005
computer-networks
crc-polynomial
normal
+
–
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