Recent questions and answers in Computer Networks

30 votes

5 answers

1

GATE2015-3-38
In the network $200.10.11.144/27$, the $fourth$ octet (in decimal) of the last $IP$ address of the network which can be assigned to a host is _____.

In the network $200.10.11.144/27$, the $fourth$ octet (in decimal) of the last $IP$ address of the network which can be assigned to a host is _____.

answered 4 hours ago in Computer Networks shashankrustagi2021 5.7k views

56 votes

9 answers

2

GATE2015-2-52
$\text{Host A}$ 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 $\text{UDP}$ ... what will 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 up to $1500\text{ bytes (i.e. MTU = 1500 bytes)}.$ Size of $\text{UDP}$ ... and what will be the contents of offset field in the last fragment? $6$ and $925$ $6$ and $7400$ $7$ and $1110$ $7$ and $8880$

answered 4 hours ago in Computer Networks shashankrustagi2021 9.9k views

18 votes

5 answers

3

GATE2015-2-41
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 {128.96.170.0} & \text{255.255.254.0} & \text{Interface $ ... a, ii-c, iii-e, iv-d i-a, ii-d, iii-b, iv-e i-b, ii-c, iii-d, iv-e 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 {128.96.170.0} & \text{255.255.254.0} & \text{Interface $0$} \\\hline\text {128.96.168.0} & \text{255.255.254.0} & \text{Interface $ ... i-a, ii-c, iii-e, iv-d i-a, ii-d, iii-b, iv-e i-b, ii-c, iii-d, iv-e i-b, ii-c, iii-e, iv-d

answered 4 hours ago in Computer Networks shashankrustagi2021 4.7k views

44 votes

5 answers

4

GATE2015-2-34
Assume that the bandwidth for a $TCP$ connection is $1048560$ bits/sec. Let $\alpha$ be the value of RTT in milliseconds (rounded off to the nearest integer) after which the $TCP$ window scale option is needed. Let $\beta$ be the maximum possible window size with window scale ... 2$^{16}$ $500$ milliseconds, $65535$ $\times $2$^{14}$ $500$ milliseconds, $65535$ $\times $2$^{16}$

Assume that the bandwidth for a $TCP$ connection is $1048560$ bits/sec. Let $\alpha$ be the value of RTT in milliseconds (rounded off to the nearest integer) after which the $TCP$ window scale option is needed. Let $\beta$ be the maximum possible window size with window scale option. Then ... $^{16}$ $500$ milliseconds, $65535$ $\times $2$^{14}$ $500$ milliseconds, $65535$ $\times $2$^{16}$

answered 16 hours ago in Computer Networks shashankrustagi2021 12.2k views

36 votes

9 answers

5

GATE2014-3-28
An $IP$ router with a $\text{Maximum Transmission Unit (MTU)}$ of $1500$ bytes has received an $IP$ packet of size $4404\text{ bytes}$ with an $IP$ header of length $20\text{ bytes}$. The values of the relevant fields in the header of the third $IP$ fragment generated ... $1,$ Datagram Length$: 1500;$ Offset$: 370$ $\text{MF bit}$: $0,$ Datagram Length$: 1424;$ Offset$: 2960$

An $IP$ router with a $\text{Maximum Transmission Unit (MTU)}$ of $1500$ bytes has received an $IP$ packet of size $4404\text{ bytes}$ with an $IP$ header of length $20\text{ bytes}$. The values of the relevant fields in the header of the third $IP$ fragment generated by the ... $1,$ Datagram Length$: 1500;$ Offset$: 370$ $\text{MF bit}$: $0,$ Datagram Length$: 1424;$ Offset$: 2960$

answered 17 hours ago in Computer Networks shashankrustagi2021 8.2k views

31 votes

6 answers

6

GATE2014-3-26
An IP router implementing Classless Inter-domain Routing (CIDR) receives a packet with address $131.23.151.76$ ... The identifier of the output interface on which this packet will be forwarded is ______.

An IP router implementing Classless Inter-domain Routing (CIDR) receives a packet with address $131.23.151.76$ ... The identifier of the output interface on which this packet will be forwarded is ______.

answered 17 hours ago in Computer Networks shashankrustagi2021 6.3k views

42 votes

3 answers

7

GATE2014-2-26
Consider the store and forward packet switched network given below. Assume that the bandwidth of each link is $10^6$ bytes / sec. A user on host $A$ sends a file of size $10^3$ bytes to host $B$ through routers $R1$ and $R2$ in three different ways. In the ... respectively. Which one of the following is CORRECT? $T1<T2<T3$ $T1>T2>T3$ $T2=T3, T3<T1$ $T1=T3, T3> T2$

Consider the store and forward packet switched network given below. Assume that the bandwidth of each link is $10^6$ bytes / sec. A user on host $A$ sends a file of size $10^3$ bytes to host $B$ through routers $R1$ and $R2$ in three different ways. In the first case a single ... third case respectively. Which one of the following is CORRECT? $T1<T2<T3$ $T1>T2>T3$ $T2=T3, T3<T1$ $T1=T3, T3> T2$

answered 18 hours ago in Computer Networks shashankrustagi2021 6.4k views

29 votes

5 answers

8

GATE2014-1-28
Consider a selective repeat sliding window protocol that uses a frame size of $1$ $\text{KB}$ to send data on a $1.5$ $\text{Mbps}$ link with a one-way latency of $50$ $\text{msec}$. To achieve a link utilization of $60\%$, the minimum number of bits required to represent the sequence number field is ________.

Consider a selective repeat sliding window protocol that uses a frame size of $1$ $\text{KB}$ to send data on a $1.5$ $\text{Mbps}$ link with a one-way latency of $50$ $\text{msec}$. To achieve a link utilization of $60\%$, the minimum number of bits required to represent the sequence number field is ________.

answered 18 hours ago in Computer Networks shashankrustagi2021 11k views

57 votes

13 answers

9

GATE2014-1-27
Let the size of congestion window of a TCP connection be $32$ KB when a timeout occurs. The round trip time of the connection is $100$ msec and the maximum segment size used is $2$ KB. The time taken (in msec) by the TCP connection to get back to $32$ KB congestion window is _________.

Let the size of congestion window of a TCP connection be $32$ KB when a timeout occurs. The round trip time of the connection is $100$ msec and the maximum segment size used is $2$ KB. The time taken (in msec) by the TCP connection to get back to $32$ KB congestion window is _________.

answered 18 hours ago in Computer Networks shashankrustagi2021 15k views

22 votes

4 answers

10

GATE2008-IT-67
Two popular routing algorithms are Distance Vector(DV) and Link State (LS) routing. Which of the following are true? (S1): Count to infinity is a problem only with DV and not LS routing (S2): In LS, the shortest path algorithm is run only at one node (S3): In ... DV requires lesser number of network messages than LS S1, S2 and S4 only S1, S3 and S4 only S2 and S3 only S1 and S4 only

Two popular routing algorithms are Distance Vector(DV) and Link State (LS) routing. Which of the following are true? (S1): Count to infinity is a problem only with DV and not LS routing (S2): In LS, the shortest path algorithm is run only at one node (S3): In DV, the ... ): DV requires lesser number of network messages than LS S1, S2 and S4 only S1, S3 and S4 only S2 and S3 only S1 and S4 only

answered 19 hours ago in Computer Networks shashankrustagi2021 3.5k views

34 votes

7 answers

11

GATE2013-37
In an IPv4 datagram, the $M$ bit is $0$, the value of $HLEN$ is $10$, the value of total length is $400$ and the fragment offset value is $300$. The position of the datagram, the sequence numbers of the first and the last bytes of the payload, respectively ... fragment, $2400$ and $2789$ First fragment, $2400$ and $2759$ Last fragment, $2400$ and $2759$ Middle fragment, $300$ and $689$

In an IPv4 datagram, the $M$ bit is $0$, the value of $HLEN$ is $10$, the value of total length is $400$ and the fragment offset value is $300$. The position of the datagram, the sequence numbers of the first and the last bytes of the payload, respectively are: Last fragment, $2400$ and $2789$ First fragment, $2400$ and $2759$ Last fragment, $2400$ and $2759$ Middle fragment, $300$ and $689$

answered 1 day ago in Computer Networks Asim Siddiqui 4 8.6k views

23 votes

3 answers

12

GATE2013-13
Using public key cryptography, $X$ adds a digital signature σ to message $M$, encrypts $<M, \sigma>$, and sends it to $Y$, where it is decrypted. Which one of the following sequences of keys is used for the operations? Encryption: $X's$ private key followed ... Encryption: $X's$ private key followed by $Y's$ public key; Decryption: $Y's$ private key followed by $X's$ public key

Using public key cryptography, $X$ adds a digital signature σ to message $M$, encrypts $<M, \sigma>$, and sends it to $Y$, where it is decrypted. Which one of the following sequences of keys is used for the operations? Encryption: $X's$ private key followed by $Y's$ ... key; Encryption: $X's$ private key followed by $Y's$ public key; Decryption: $Y's$ private key followed by $X's$ public key

answered 1 day ago in Computer Networks Asim Siddiqui 4 4k views

35 votes

4 answers

13

GATE2011-52
Consider a network with five nodes, $N1$ to $N5$, as shown as below. The network uses a Distance Vector Routing protocol. Once the routes have been stabilized, the distance vectors at different nodes are as follows. N1: $(0, 1, 7, 8, 4)$ N2: $(1, 0, 6, 7, 3)$ N3: $(7, 6, 0, 2, 6)$ ... node, $N3$? $(3, 2, 0, 2, 5)$ $(3, 2, 0, 2, 6)$ $(7, 2, 0, 2, 5)$ $(7, 2, 0, 2, 6)$

Consider a network with five nodes, $N1$ to $N5$, as shown as below. The network uses a Distance Vector Routing protocol. Once the routes have been stabilized, the distance vectors at different nodes are as follows. N1: $(0, 1, 7, 8, 4)$ N2: $(1, 0, 6, 7, 3)$ N3: $(7, 6, 0, 2, 6)$ N4: $(8, 7, 2, 0, 4)$ ... at node, $N3$? $(3, 2, 0, 2, 5)$ $(3, 2, 0, 2, 6)$ $(7, 2, 0, 2, 5)$ $(7, 2, 0, 2, 6)$

answered 1 day ago in Computer Networks Asim Siddiqui 4 7.7k views

46 votes

6 answers

14

GATE2010-54
Consider a network with $6$ routers $R1$ to $R6$ connected with links having weights as shown in the following diagram. All the routers use the distance vector based routing algorithm to update their routing tables. Each router starts with its routing table initialized to contain ... stabilize, how many links in the network will never be used for carrying any data? $4$ $3$ $2$ $1$

Consider a network with $6$ routers $R1$ to $R6$ connected with links having weights as shown in the following diagram. All the routers use the distance vector based routing algorithm to update their routing tables. Each router starts with its routing table initialized to contain an entry ... tables stabilize, how many links in the network will never be used for carrying any data? $4$ $3$ $2$ $1$

answered 2 days ago in Computer Networks shashankrustagi2021 7.5k views

25 votes

4 answers

15

GATE2010-47
Suppose computers $A$ and $B$ have $IP$ addresses $10.105.1.113$ and $10.105.1.91$ respectively and they both use same netmask $N$. Which of the values of $N$ given below should not be used if $A$ and $B$ should belong to the same network? $255.255.255.0$ $255.255.255.128$ $255.255.255.192$ $255.255.255.224$

Suppose computers $A$ and $B$ have $IP$ addresses $10.105.1.113$ and $10.105.1.91$ respectively and they both use same netmask $N$. Which of the values of $N$ given below should not be used if $A$ and $B$ should belong to the same network? $255.255.255.0$ $255.255.255.128$ $255.255.255.192$ $255.255.255.224$

answered 3 days ago in Computer Networks shashankrustagi2021 4.8k views

19 votes

3 answers

16

GATE2008-57
If a class $B$ network on the Internet has a subnet mask of $255.255.248.0$, what is the maximum number of hosts per subnet? $1022$ $1023$ $2046$ $2047$

If a class $B$ network on the Internet has a subnet mask of $255.255.248.0$, what is the maximum number of hosts per subnet? $1022$ $1023$ $2046$ $2047$

answered 3 days ago in Computer Networks shashankrustagi2021 4.2k views

34 votes

3 answers

17

GATE2008-59
A client process P needs to make a TCP connection to a server process S. Consider the following situation: the server process S executes a $\text{socket()}$, a $\text{bind()}$ and a $\text{listen()}$ system call in that order, following which it is preempted ... $\text{connect()}$ system call returns an error $\text{connect()}$ system call results in a core dump

A client process P needs to make a TCP connection to a server process S. Consider the following situation: the server process S executes a $\text{socket()}$, a $\text{bind()}$ and a $\text{listen()}$ system call in that order, following which it is preempted. ... $\text{connect()}$ system call returns an error $\text{connect()}$ system call results in a core dump

answered 3 days ago in Computer Networks shashankrustagi2021 6.4k views

24 votes

4 answers

18

GATE2008-17
Which of the following system calls results in the sending of SYN packets? socket bind listen connect

Which of the following system calls results in the sending of SYN packets? socket bind listen connect

answered 3 days ago in Computer Networks shashankrustagi2021 5.1k views

30 votes

6 answers

19

GATE2008-14, ISRO2016-74
What is the maximum size of data that the application layer can pass on to the TCP layer below? Any size $2^{16}$ bytes - size of TCP header $2^{16}$ bytes $1500$ bytes

What is the maximum size of data that the application layer can pass on to the TCP layer below? Any size $2^{16}$ bytes - size of TCP header $2^{16}$ bytes $1500$ bytes

answered 3 days ago in Computer Networks shashankrustagi2021 7.9k views

51 votes

6 answers

20

GATE2003-84
Host $A$ is sending data to host $B$ over a full duplex link. $A$ and $B$ are using the sliding window protocol for flow control. The send and receive window sizes are $5$ packets each. Data packets (sent only from $A$ to $B$) are all $1000$ bytes long and the transmission ... communication? $7.69 \times 10^6$ Bps $11.11 \times 10^6$ Bps $12.33 \times 10^6$ Bps $15.00 \times 10^6$ Bps

Host $A$ is sending data to host $B$ over a full duplex link. $A$ and $B$ are using the sliding window protocol for flow control. The send and receive window sizes are $5$ packets each. Data packets (sent only from $A$ to $B$) are all $1000$ bytes long and the transmission time for ... communication? $7.69 \times 10^6$ Bps $11.11 \times 10^6$ Bps $12.33 \times 10^6$ Bps $15.00 \times 10^6$ Bps

answered 3 days ago in Computer Networks vipin.gautam1906 11.5k views

38 votes

13 answers

21

GATE2007-67, ISRO2016-72
The address of a class $B$ host is to be split into subnets with a $6$-$bit$ subnet number. What is the maximum number of subnets and the maximum number of hosts in each subnet? $62$ subnets and $262142$ hosts. $64$ subnets and $262142$ hosts. $62$ subnets and $1022$ hosts. $64$ subnets and $1024$ hosts.

The address of a class $B$ host is to be split into subnets with a $6$-$bit$ subnet number. What is the maximum number of subnets and the maximum number of hosts in each subnet? $62$ subnets and $262142$ hosts. $64$ subnets and $262142$ hosts. $62$ subnets and $1022$ hosts. $64$ subnets and $1024$ hosts.

answered 3 days ago in Computer Networks shashankrustagi2021 13.8k views

30 votes

3 answers

22

GATE2007-IT-14
Consider a $TCP$ connection in a state where there are no outstanding $ACK$s. The sender sends two segments back to back. The sequence numbers of the first and second segments are $230$ and $290$ respectively. The first segment was lost, but the second segment was received correctly by the ... and $Y$ (in that order) are $60$ and $290$ $230$ and $291$ $60$ and $231$ $60$ and $230$

Consider a $TCP$ connection in a state where there are no outstanding $ACK$s. The sender sends two segments back to back. The sequence numbers of the first and second segments are $230$ and $290$ respectively. The first segment was lost, but the second segment was received correctly by the receiver. Let ... $Y$ (in that order) are $60$ and $290$ $230$ and $291$ $60$ and $231$ $60$ and $230$

answered 3 days ago in Computer Networks shashankrustagi2021 3.5k views

20 votes

5 answers

23

GATE2006-45
Two computers $C1$ and $C2$ are configured as follows. $C1$ has IP address $203.197.2.53$ and netmask $255.255.128.0$. $C2$ has IP address $203.197.75.201$ and netmask $255.255.192.0$. Which one of the following statements is true? $C1$ and $C2$ both ... $C2$ is on same network, but $C2$ assumes $C1$ is on a different network $C1$ and $C2$ both assume they are on different networks.

Two computers $C1$ and $C2$ are configured as follows. $C1$ has IP address $203.197.2.53$ and netmask $255.255.128.0$. $C2$ has IP address $203.197.75.201$ and netmask $255.255.192.0$. Which one of the following statements is true? $C1$ and $C2$ both assume ... assumes $C2$ is on same network, but $C2$ assumes $C1$ is on a different network $C1$ and $C2$ both assume they are on different networks.

answered 3 days ago in Computer Networks shashankrustagi2021 4.7k views

43 votes

5 answers

24

GATE2006-IT-64
Suppose that it takes $1$ unit of time to transmit a packet (of fixed size) on a communication link. The link layer uses a window flow control protocol with a window size of $N$ packets. Each packet causes an ack or a nak to be generated by the receiver, and ack/nak transmission times are negligible. ... $1- \dfrac{ N}{i}$ $\dfrac{i}{(N + i)}$ $1$ $1 - e^{\left(\frac{i}{N}\right)}$

Suppose that it takes $1$ unit of time to transmit a packet (of fixed size) on a communication link. The link layer uses a window flow control protocol with a window size of $N$ packets. Each packet causes an ack or a nak to be generated by the receiver, and ack/nak transmission times are negligible. Further, ... is $1- \dfrac{ N}{i}$ $\dfrac{i}{(N + i)}$ $1$ $1 - e^{\left(\frac{i}{N}\right)}$

answered 4 days ago in Computer Networks shashankrustagi2021 4.8k views

39 votes

7 answers

25

GATE2004-57
Consider three IP networks $A, B$ and $C$. Host $H_A$ in network $A$ sends messages each containing $180$ $bytes$ of application data to a host $H_C$ in network $C$. The TCP layer prefixes $20$ byte header to the message. This passes through an intermediate network $B$. The ... other overheads. $325.5$ $\text{Kbps}$ $354.5$ $\text{Kbps}$ $409.6$ $\text{Kbps}$ $512.0$ $\text{Kbps}$

Consider three IP networks $A, B$ and $C$. Host $H_A$ in network $A$ sends messages each containing $180$ $bytes$ of application data to a host $H_C$ in network $C$. The TCP layer prefixes $20$ byte header to the message. This passes through an intermediate network $B$. The maximum packet ... other overheads. $325.5$ $\text{Kbps}$ $354.5$ $\text{Kbps}$ $409.6$ $\text{Kbps}$ $512.0$ $\text{Kbps}$

answered 4 days ago in Computer Networks shashankrustagi2021 7.5k views

39 votes

9 answers

26

GATE2004-IT-88
Suppose that the maximum transmit window size for a TCP connection is $12000$ $\text{bytes}$. Each packet consists of $2000$ $\text{bytes}$. At some point in time, the connection is in slow-start phase with a current transmit window of $4000$ $\text{bytes}$. ... current transmit window? $4000$ $\text{bytes}$ $8000$ $\text{bytes}$ $10000$ $\text{bytes}$ $12000$ $\text{bytes}$

Suppose that the maximum transmit window size for a TCP connection is $12000$ $\text{bytes}$. Each packet consists of $2000$ $\text{bytes}$. At some point in time, the connection is in slow-start phase with a current transmit window of $4000$ $\text{bytes}$. Subsequently, the ... the current transmit window? $4000$ $\text{bytes}$ $8000$ $\text{bytes}$ $10000$ $\text{bytes}$ $12000$ $\text{bytes}$

answered 4 days ago in Computer Networks shashankrustagi2021 9.3k views

27 votes

4 answers

27

GATE2004-IT-25
A sender is employing public key cryptography to send a secret message to a receiver. Which one of the following statements is TRUE? Sender encrypts using receiver's public key Sender encrypts using his own public key Receiver decrypts using sender's public key Receiver decrypts using his own public key

A sender is employing public key cryptography to send a secret message to a receiver. Which one of the following statements is TRUE? Sender encrypts using receiver's public key Sender encrypts using his own public key Receiver decrypts using sender's public key Receiver decrypts using his own public key

answered 4 days ago in Computer Networks vipin.gautam1906 6.9k views

18 votes

12 answers

28

GATE2019-29
Suppose that in an IP-over-Ethernet network, a machine X wishes to find the MAC address of another machine Y in its subnet. Which one of the following techniques can be used for this? X sends an ARP request packet to the local gateway's IP ... ARP request packet with broadcast MAC address in its local subnet X sends an ARP request packet with broadcast IP address in its local subnet

Suppose that in an IP-over-Ethernet network, a machine X wishes to find the MAC address of another machine Y in its subnet. Which one of the following techniques can be used for this? X sends an ARP request packet to the local gateway's IP address which ... ARP request packet with broadcast MAC address in its local subnet X sends an ARP request packet with broadcast IP address in its local subnet

answered 4 days ago in Computer Networks vipin.gautam1906 6.4k views

25 votes

6 answers

29

GATE2018-54
Consider an IP packet with a length of $4,500$ $bytes$ that includes a $20-byte$ IPv4 header ans $40-byte$ TCP header. The packet is forwarded to an IPv4 router that supports a Maximum Transmission Unit (MTU) of $600$ $bytes$. Assume that ... that the fragmentation offset value stored in the first fragment is $0$. The fragmentation offset value stored in the third fragment is _____.

Consider an IP packet with a length of $4,500$ $bytes$ that includes a $20-byte$ IPv4 header ans $40-byte$ TCP header. The packet is forwarded to an IPv4 router that supports a Maximum Transmission Unit (MTU) of $600$ $bytes$. Assume that the ... Assume that the fragmentation offset value stored in the first fragment is $0$. The fragmentation offset value stored in the third fragment is _____.

answered 4 days ago in Computer Networks shashankrustagi2021 6.5k views

0 votes

2 answers

30

nielit 2018 q52
Given a mask, M=255.255.255.248. How many subnet bits are required for given mask M? (A) 2 (B) 3 (C) 4 (D)5

Given a mask, M=255.255.255.248. How many subnet bits are required for given mask M? (A) 2 (B) 3 (C) 4 (D)5

answered 5 days ago in Computer Networks vishal23071998 134 views

13 votes

6 answers

31

GATE2019-54
In an RSA cryptosystem, the value of the public modulus parameter $n$ is $3007$. If it is also known as that $\phi(n)=2880$ where $\phi()$ denotes Euler’s Totient Function, then the prime factor of $n$ which is greater than $50$ is _________

In an RSA cryptosystem, the value of the public modulus parameter $n$ is $3007$. If it is also known as that $\phi(n)=2880$ where $\phi()$ denotes Euler’s Totient Function, then the prime factor of $n$ which is greater than $50$ is _________

answered 6 days ago in Computer Networks shashankrustagi2021 4.1k views

36 votes

3 answers

32

GATE2008-IT-69
The three way handshake for TCP connection establishment is shown below. Which of the following statements are TRUE? $S1:$ Loss of $SYN + ACK$ from the server will not establish a connection $S2:$ Loss of $ACK$ from the client cannot establish the connection $S3:$ ... on no packet loss $S2$ and $S3$ only $S1$ and $S4$ only $S1$ and $S3$ only $S2$ and $S4$ only

The three way handshake for TCP connection establishment is shown below. Which of the following statements are TRUE? $S1:$ Loss of $SYN + ACK$ from the server will not establish a connection $S2:$ Loss of $ACK$ from the client cannot establish the connection $S3:$ ... machine on no packet loss $S2$ and $S3$ only $S1$ and $S4$ only $S1$ and $S3$ only $S2$ and $S4$ only

answered 6 days ago in Computer Networks Upendra._goyal 5.5k views

26 votes

6 answers

33

GATE2006-IT-65
In the $4B/5B$ encoding scheme, every $4$ bits of data are encoded in a $5$-bit codeword. It is required that the codewords have at most $1$ leading and at most $1$ trailing zero. How many are such codewords possible? $14$ $16$ $18$ $20$

In the $4B/5B$ encoding scheme, every $4$ bits of data are encoded in a $5$-bit codeword. It is required that the codewords have at most $1$ leading and at most $1$ trailing zero. How many are such codewords possible? $14$ $16$ $18$ $20$

answered Jul 28 in Computer Networks vipin.gautam1906 4k views

18 votes

5 answers

34

GATE2018-13
Match the following: ... $\text{P-II, Q-I, R-IV, S-III}$ $\text{P-IV, Q-I, R-II, S-III}$ $\text{P-IV, Q-I, R-III, S-II}$

Match the following: ... $\text{P-II, Q-I, R-IV, S-III}$ $\text{P-IV, Q-I, R-II, S-III}$ $\text{P-IV, Q-I, R-III, S-II}$

answered Jul 25 in Computer Networks dhairya762 3.3k views

32 votes

4 answers

35

GATE2007-IT-64
A broadcast channel has $10$ nodes and total capacity of $10$ Mbps. It uses polling for medium access. Once a node finishes transmission, there is a polling delay of $80$ μs to poll the next node. Whenever a node is polled, it is allowed to transmit a maximum of $1000$ bytes. The maximum throughput of the broadcast channel is: $1$ Mbps $100/11$ Mbps $10$ Mbps $100$ Mbps

A broadcast channel has $10$ nodes and total capacity of $10$ Mbps. It uses polling for medium access. Once a node finishes transmission, there is a polling delay of $80$ μs to poll the next node. Whenever a node is polled, it is allowed to transmit a maximum of $1000$ bytes. The maximum throughput of the broadcast channel is: $1$ Mbps $100/11$ Mbps $10$ Mbps $100$ Mbps

answered Jul 24 in Computer Networks vipin.gautam1906 3.9k views

2 votes

4 answers

36

GATE2020-CS-15
Consider the following statements about the functionality of an IP based router. A router does not modify the IP packets during forwarding. It is not necessary for a router to implement any routing protocol. A router should reassemble IP fragments if the MTU of the outgoing ... incoming IP packet. Which of the above statements is/are TRUE? I and II only I only II and III only II only

Consider the following statements about the functionality of an IP based router. A router does not modify the IP packets during forwarding. It is not necessary for a router to implement any routing protocol. A router should reassemble IP fragments if the MTU of the outgoing link is ... the incoming IP packet. Which of the above statements is/are TRUE? I and II only I only II and III only II only

answered Jul 22 in Computer Networks vivekgatecs2020 1.6k views

0 votes

2 answers

37

Andrew S. Tanenbaum Edition 5th Exercise 3 Question 3 (Page No. 252)
The following data fragment occurs in the middle of a data stream for which the bytestuffing algorithm described in the text is used: A B ESC C ESC FLAG FLAG D. What is the output after stuffing

The following data fragment occurs in the middle of a data stream for which the bytestuffing algorithm described in the text is used: A B ESC C ESC FLAG FLAG D. What is the output after stuffing

answered Jul 22 in Computer Networks roh 149 views

0 votes

1 answer

38

Made easy test GATE 2019 MOCK 1 Question 53
IF the above network uses class C network 192.203.16.0; Then find the DBA used for Dept Y

IF the above network uses class C network 192.203.16.0; Then find the DBA used for Dept Y

answered Jul 21 in Computer Networks Sherrinford03 108 views

3 votes

3 answers

39

Circuit switching vs packet switching
Suppose that x bit of message is transmitted over a k -hop path in a network.The circuit set up time is s seconds,the propagation delay is d seconds per hop.The packet size is p bits and data rate is b bps.At what time user will receive the message if a.) Circuit switching is used b:) Packet switching is used

Suppose that x bit of message is transmitted over a k -hop path in a network.The circuit set up time is s seconds,the propagation delay is d seconds per hop.The packet size is p bits and data rate is b bps.At what time user will receive the message if a.) Circuit switching is used b:) Packet switching is used

answered Jul 20 in Computer Networks Sanjay Bhargva 945 views

65 votes

9 answers

40

GATE2015-3-36
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 data are to ... elapsed 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 packet $35$ microseconds after it receives the same. If $10000$ bits of data are to be ... time elapsed between the transmission of the first bit of data and the reception of the last bit of the data in microseconds is ______.

answered Jul 18 in Computer Networks surya_madhav 13.4k views

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