Recent questions tagged network-layering

0 votes

2 answers

1

GATEBOOK-2019-CN2-6
A router is emitting out IP packets whose total length (data plus header) is $1024$ bytes.Assuming that packets live for $10$ sec, what is the maximum line speed the router can operate at without danger of cycling through the IP datagram identification number space? $53.6$ Mbps $3.5$ Tbps $5.36$ Mbps $35$ Tbps

asked Oct 28, 2018 in Computer Networks by GATEBOOK Boss (12.7k points) | 223 views

0 votes

1 answer

2

GATEBOOK-2019-CN2-7
Which of the following statement is FALSE about IP protocol ? If an IP datagram using the strict source routing option has to be fragmented then the option is copied into each fragment Routers reassemble IP fragments if the next link can handle the full datagram IPv6 communication across IPv4 networks uses tunneling TTL field can be initialized by other protocols

asked Oct 28, 2018 in Computer Networks by GATEBOOK Boss (12.7k points) | 107 views

+9 votes

3 answers

3

GATE2018-13
Match the following: Field Length in bits P. UDP Header's Port Number I. $48$ Q. Ethernet MAC Address II. $8$ R. IPv6 Next Header III. $32$ S. TCP Header's Sequence Number IV. $16$ $\text{P-III, Q-IV, R-II, S-I}$ $\text{P-II, Q-I, R-IV, S-III}$ $\text{P-IV, Q-I, R-II, S-III}$ $\text{P-IV, Q-I, R-III, S-II}$

asked Feb 14, 2018 in Computer Networks by gatecse Boss (18.3k points) | 1.8k views

+1 vote

2 answers

4

OSI Model
Network layer is used when data is to be delivered across network. So, for delivering within a network, there is no need for network layer (Ref: Pg-49, Computer Networks, Forouzan, 2 Edition). So in that case will Transport layer directly communicate with Data Link layer ? Or will Network layer be in picture, but do nothing other than simply passing data to Transport layer ?

asked Feb 10, 2018 in Computer Networks by Arunav Khare Loyal (5.3k points) | 217 views

0 votes

0 answers

5

Essential and Optional functionality of each layer in TCP/IP 7-Layer model
Hi Guys, Can anyone please list Essential and Optional functionality of each layer in TCP/IP 7-Layer model ? If some functionality is optional then which other layer/layers could handle that functionality.

asked Dec 18, 2017 in Computer Networks by Chhotu Boss (12.1k points) | 167 views

+1 vote

1 answer

6

Border Gateway Protocol
Why BGP is an application layer Protocol? Ref :- https://en.wikipedia.org/wiki/Border_Gateway_Protocol

asked Oct 3, 2017 in Computer Networks by Shubhanshu Boss (17.8k points) | 359 views

+4 votes

1 answer

7

Fragmentation
Which of the following statements is/ are true about the fragmentation which is done at network layer. (I) The offset of 1st fragment is always offset of parent. (II) The MF of last fragment is always same MF of parent. I think I is true and II is false: Explanation for II :- Host A ... MF = 1 packet 1.3 <20,40> MF = 0 packet 1.3's MF != MF of packet 1 In A-R1. is it correct.

asked Aug 22, 2017 in Computer Networks by Shubhanshu Boss (17.8k points) | 449 views

+4 votes

2 answers

8

Fragmentation
Suppose a network:- Suppose a TCP message contains 492 B of data and TCP header is of size 20B then deliver it to IP. IP header is 20 B. Assume link A-R1 has the maximum frame size of 700 B including a frame size of 14 B, link R1-R2 can support a ... of 256 B including a 12 B frame header. Then calculate the no of fragments at each link and show the format of fragments in each link.

asked Aug 19, 2017 in Computer Networks by Shubhanshu Boss (17.8k points) | 547 views

+3 votes

1 answer

9

Fragmentation Network layer
I got answer 12 is it Right or wrong

asked Jul 6, 2017 in Computer Networks by Nitesh Choudhary Active (2.8k points) | 435 views

+6 votes

2 answers

10

Tanenbaum
A datagram network allows routers to drop packets whenever they need to. The probability of a router discarding a packet is p. Consider the case of a source host connected to the source router, which is connected to the destination router, and then to the destination ... of (a) hops a packet makes per transmission? (b) transmissions a packet makes? (c) hops required per received packet?

asked Apr 7, 2017 in Computer Networks by anonymous | 623 views

+2 votes

1 answer

11

CN:Routing Table using RIP Protocol

asked Apr 6, 2017 in Computer Networks by LavTheRawkstar Loyal (5.2k points) | 213 views

+2 votes

2 answers

12

Routing Tables Network Layer
Please tell me which interface will be selected for the above IP address

asked Jan 27, 2017 in Computer Networks by Ramakrishna Junior (723 points) | 343 views

+3 votes

1 answer

13

Which device have Exactly one i/p address? (Work Station,Router,Gateway can have more than one i/p)

asked Jan 14, 2017 in Computer Networks by smartmeet Active (5.1k points) | 499 views

+6 votes

1 answer

14

Fragmentation Ipv4-Ipv6
True or false - 1. In Ipv4 fragmentation can be done both at Source and intermediate routers. 2. In Ipv6 fragmentation can be done only at Source and not intermediate routers. 3. In both IPv6/4 reassembly is done only at the destination. 4. ... fragmentation done at the Source in Ipv4? Should the 1) be false since segmentation is done and hence fragmentation can be avoided?

asked Dec 31, 2016 in Computer Networks by yg92 Active (3.4k points) | 790 views

+4 votes

2 answers

15

Fragmentation and Total length field value
In this question, After fragmenting at Network2, what will be the total length field values of the 4 fragmented IP packets ?

asked Aug 30, 2016 in Computer Networks by Debashish Deka Veteran (57.8k points) | 451 views

+1 vote

0 answers

16

Transfering Data and Transmitter Power, is there any idea?
We have one 1-MB file that in 1second moved from 1Mhz channel with 60db Attenuation. if the density of power to noise be -174 dBm/Hz, the transmitter power is equal to 1Micro Watt. My question is how this value be calculated? any idea?

asked Aug 4, 2016 in Computer Networks by DrMhmd (59 points) | 223 views

+7 votes

1 answer

17

UGCNET-Dec2013-III-45
Which layer of OSI reference model is responsible for decomposition of messages and generation of sequence numbers to ensure correct re-composition from end to end of the network? Physical Data-link Transport Application

asked Jul 29, 2016 in Computer Networks by jothee Veteran (112k points) | 794 views

+3 votes

2 answers

18

UGCNET-Dec2012-II-17
The design issue of Datalink layer in OSI Reference Model is Framing Representation of bits Synchronization of bits Connection control

asked Jul 8, 2016 in Computer Networks by jothee Veteran (112k points) | 960 views

+3 votes

2 answers

19

UGCNET-June2012-II-15
Decryption and encryption of data are responsibility of which of the following layer? Physical layer Data link layer Presentation layer Session layer

asked Jul 5, 2016 in Computer Networks by jothee Veteran (112k points) | 2.3k views

+4 votes

4 answers

20

UGCNET-June2012-II-6
Both hosts and routers and TCP/IP protocol software. However, routers do not use protocol from all layers. The layer for which the protocol software is not needed by a router is Layer – 5 (Application) Layer – 1 (Physical) Layer – 3 (Internet) Layer – 4 (Network Interface)

asked Jul 4, 2016 in Computer Networks by jothee Veteran (112k points) | 927 views

+1 vote

3 answers

21

gateforum

asked Jun 28, 2016 in Computer Networks by Shivani Jaiswal (189 points) | 509 views

+13 votes

4 answers

22

ISRO2015-58
Which layers of the OSI reference model are host-to-host layers? Transport, session, presentation, application Session, presentation, application Datalink, transport, presentation, application Physical, datalink, network, transport

asked Jun 20, 2016 in Computer Networks by jothee Veteran (112k points) | 3.7k views

+4 votes

4 answers

23

At which layer of OSI Model does a router work?
A .Presentation Layer B .Transport Layer C .Network Layer D .Datalink Layer E .Application Layer F .Physical Layer G .Session Layer

asked Jun 15, 2016 in Computer Networks by Don't you worry Active (1.6k points) | 1.4k views

+7 votes

5 answers

24

ISRO2007-75
When a host on network A sends a message to a host on network B, which address does the router look at? Port IP Physical Subnet mask

asked Jun 10, 2016 in Computer Networks by jothee Veteran (112k points) | 3k views

+3 votes

2 answers

25

UGCNET-June2014-II-05
Match the following : List - I List - II a. Physical layer i. Allow resources to network access b. Datalink layer ii. Move packets from one destination to other c. Network layer iii. Process to process message delivery d. Transport layer iv. Transmission of bit stream e. Application Layer v. Formation of ... ; d-ii; e-iii a-i; b-iii; c-ii; d-v; e-iv a-i; b-ii; c-iv; d-iii; e-v

asked Jun 8, 2016 in Computer Networks by makhdoom ghaya Boss (40.8k points) | 780 views

+7 votes

2 answers

26

ISRO2011-32
In which layer of network architecture, the secured socket layer (SSL) is used? physical layer session layer application layer presentation layer

asked Oct 1, 2015 in Computer Networks by ajit Active (3.3k points) | 2.7k views

+17 votes

6 answers

27

GATE2014-3-23
In the following pairs of OSI protocol layer/sub-layer and its functionality, the INCORRECT pair is Network layer and Routing Data Link Layer and Bit synchronization Transport layer and End-to-end process communication Medium Access Control sub-layer and Channel sharing

asked Sep 28, 2014 in Computer Networks by jothee Veteran (112k points) | 1.9k views

+21 votes

5 answers

28

GATE2013-14
Assume that source S and destination D are connected through two intermediate routers labeled R. Determine how many times each packet has to visit the network layer and the data link layer during a transmission from S to D. Network layer - $4$ times and Data link layer - $4$ ... layer - $4$ times and Data link layer - $6$ times Network layer - $2$ times and Data link layer - $6$ times

asked Sep 23, 2014 in Computer Networks by Arjun Veteran (377k points) | 3.8k views

+14 votes

4 answers

29

GATE2007-70
Match the following: (P) SMTP (1) Application layer (Q) BGP (2) Transport layer (R) TCP (3) Data link layer (S) PPP (4) Network layer (5) Physical layer $\text{P - 2, Q - 1, R - 3, S - 5}$ $\text{P - 1, Q - 4, R - 2, S - 3}$ $\text{P - 1, Q - 4, R - 2, S - 5}$ $\text{P - 2, Q - 4, R - 1, S - 3}$

asked Sep 22, 2014 in Computer Networks by Kathleen Veteran (59.8k points) | 2.2k views

+18 votes

3 answers

30

GATE2004-15
Choose the best matching between $\text{Group 1}$ and $\text{Group 2}$ Group - 1 Group -2 P. Data link layer 1. Ensures reliable transport of data over a physical point-to-point link Q. Network layer 2. Encodes/decodes data for physical transmission R. Transport layer 3. Allows end-to-end communication between ... $\text{P-2, Q-4, R-1}$ $\text{P-2, Q-3, R-1}$ $\text{P-1, Q-3, R-2}$

asked Sep 19, 2014 in Computer Networks by Kathleen Veteran (59.8k points) | 1.6k views

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