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1. Dear students get fully solved assignments
Send your semester & Specialization name to our mail id :
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SPRING 2016, ASSIGNMENT
PROGRAM BCA (REVISED FALL 2012)
SEMESTER 4
SUBJECT CODE & NAME BCA 4010 COMPUTER NETWORKING
CREDIT 4
BK ID B0956
MAX.MARKS 60
Q1 What is OSI model? Explain all its layers with diagram.
Answer : The OSI, or Open System Interconnection, model defines a networking framework to
implement protocols in seven layers. Control is passed from one layer to the next, starting at the
application layer in one station, and proceeding to the bottom layer, over the channel to the next
station and back up the hierarchy.
There'sreallynothingtothe OSImodel.Infact,it's not eventangible. The OSI model doesn't do any
functions in the networking process, It is a conceptual framework so we can better understand
complex interactions that are happening. The OSI
Q 2 What is Message switching and Packet switching?
Answer : Message Switching
This technique was somewhere in middle of circuit switching and packet switching. In message
switching,the whole message is treated as a data unit and is switching / transferred in its entirety.
A switchworkingonmessage switching,first receives the whole message and buffers it until there
are resourcesavailabletotransfer it to the next hop. If the next hop is not having enough resource
to accommodate large size message, the
Q3. List the design issues related to Data Link Layer.

2. Answer:The data linklayerorlayer2 isthe secondlayer of the seven-layer OSI model of computer
networking.Thislayeristhe protocol layerthattransfersdatabetweenadjacentnetwork nodes in a
wide areanetwork(WAN) orbetweennodesonthe same local areanetwork (LAN) segment.[1] The
data link layer provides the functional and procedural means to transfer data between network
entities and might provide the means to detect and possibly correct errors that may occur in the
physical layer.
Q4. Briefly explain Point-to-Point Protocol.
Answer : PPP (Point-to-Point Protocol) is a protocol for communication between two computers
using a serial interface, typically a personal computer connected by phone line to a server. For
example,yourInternetserverprovidermayprovide youwithaPPPconnectionsothat the provider's
server can respond to your requests, pass them on to the Internet, and forward your requested
Internet responses back to you. PPP uses the Internet protocol (IP) (and is designed to handle
others).Itissometimesconsideredamemberof the TCP/IPsuite of protocols. Relative to the Open
Systems Interconnection (OSI) reference model, PPP provides layer 2 (data-link layer) service.
Essentially,itpackagesyourcomputer'sTCP/IPpacketsandforwardsthemtothe server where they
can actually be put on the Internet.
Q5. Briefly explain five parts of Multipurpose Internet Mail Extensions.
Answer : Multipurpose Internet Mail Extensions (MIME)
Description
 Multipurpose Internet Mail Extensions (MIME) is an Internet protocol used to send
audio, video, programs, graphics and other binary files.
 MIME specifies how to convert the non-ASCII data into ASCII allowing it to remain
compatible with existing email protocols.
 MIME definesfiveadditional email header fields: MIME-Version, Content-Description,
Content ID, Content-Transfer-Encoding, and Content-Type.
 The Versionfield specifies the MIME version and informs the receiver that it is dealing
with a MIME message.
Q6. Distinguish between IPV4 and IPV6 addressing schemes
Answer : With the advent of Internet, there was a flow of information between the computers
throughInternetProtocol.IPAddresseswere assignedtogroupof organizations/institutionstoopen
up communicationchannelsbetweencomputernetworks.Thiskind of allocation was done through
IPv4 Protocol.Withthe growing technology, there were growing demands of more such addresses
for whichthe IPv4 was understated. Now, there has been news all around about IPv6 setup due to
the scantiness of IPv4. But then what is it all about?
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