COMPUTER NETWORK
S.NO.5073 CNTY1
(for candidates admitted from 2006-2007 onwards)
B.C.A.DEGREE EXAMINATION,NOVEMBER 2007
Part V-computer application- Major
COMPUTER NETWORK
Time : Three hours Maximum : 75 marks
SECTION A-(10 x 2 = 20 )
1. concerned with transmitting RAM bits over a communicat -ion channel.
2. Transmission of unstructured bit-stream over physical medium. It deals with the mechanical,
3.electrical, functional, & procedural characteristics to access
4. the physical medium.Datalink: To take a raw transmission
5. facility & transform it into a line that appears
6. free to undetected transmission errors to the network layer. In it, software on
7. the source machine can retransmit the frame & multiple
8. transmission of the same frame introduce the possibility
9. if the acknowledgement frame from of duplicate frames A duplicate
10.frames could be sent the receiver back to the sender were lost.
SECTION B-(10 x 2 = 20 )
11.(a) It may offer several different service classes to the network layer, each of a different quality & different price.
(b)Network: It is concerned with controlling the operation of the subnet.
12. (a)A key design issue is determining how packets are routed from source to destination.
(b)Provides upper layers with independence from the data transmission & switching
13. (a)technologies used to connect systems. Responsible for establishing
(b)Transport: Provides reliable, transparent transfer of data between end-points;
14. (a) provides END-TO-END error recovery & flow control.
(b)To accept data from the session layer, split it up into smaller units if need be, pass
15. (a) these to the network layer. It creates a distinct network
(b) connection for each transport connection required by the session layer.
(b) Most popular, type of transport connection is an error-free point-to- point channel
SECTION C-(3 x10 = 30 )
16.that delivers messages/bytes in the order in which they were sent. The type of services is determined
(b)when the connection is established. In it, it is a true END- TO-END layer, from source to destination.
17.Session: Provides the control structure for communication between application,
(b)communication between application connection between co-operation, applications. Allows users on different
18.(a)machines to establish session between them, & also allows ordinary data transport.
(b) Another service is synchronization.Presentation:It is concerned with the syntax & semantics
19.(a) the information transmitted.provides independence to the application
(b)processes from difference in data representation.
20. (a) Application: It contain a variety of protocols It contain a variety of protocols
(b) access to the OSI environment for users & also provides distributed information services.
S.NO.5073 CNTY1
(for candidates admitted from 2006-2007 onwards)
B.C.A.DEGREE EXAMINATION,NOVEMBER 2007
Part V-computer application- Major
COMPUTER NETWORK
Time : Three hours Maximum : 75 marks
SECTION A-(10 x 2 = 20 )
1. T.Broadcast n/w:a single communication channel
2. that is shared by all the machines on the network.
3. short messages, called packets in certain context, sent by any received by all the others.
4. An address machine are field within the packet
5. specifies for whom it is intended a packet is intended for itself, it processes
6. the packet; if the packet is intended for some other machine,
7. it is just ignored. It also allow the possibility of addressing a packet to all destination by
8. using a special code in the address field.
9. When a packet with this code is transmitted,
10. it is received & processed by every machine on the n/w
SECTION B-(10 x 2 = 20 )
11. (a) p-to-p:consists of many connections between individual
(b)pairs of machines. From the source to the destination,
12. (a) a packet on this type of network may have to first visit one/more
(b) intermediate machines. Often multiple routes, of different lengths are possible,
13.(a) so routing algorithms play an important role in it.
(b)As a general rule(although there are many exceptions), smaller, geographically
14. (a) localized networks tend to use broadcasting,
(b) where as larger networks usually are point-to- point.
15. (a)T.protocol hierarchies:To reduce their design complexity,
(b)most networks are organized as a series of LAYERS/ LEVELS.
SECTION C-(3 x10 = 30 )
16. (a) The number of layers , the contents of each layer, & the function of each
(b)layer differ from network to network. The purpose of each layer is to offer certain services to the higher layers
17. (a)Layer n on one machine carries on a conversation with layer n on another machine.
(b) conversation are collectively known as the layer n protocol.
18. (a)agreement between on how communication is to proceed.
(b)The entities comprising the corresponding layers on different machines are called PEERS.