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PROGRAM-BCA (REVISED
FALL 2012)
SEMESTER-4
SUBJECT CODE &
NAME-BCA 4010/IMC4010 COMPUTER NETWORKING
CREDIT-4
BK ID-B0956
MAX. MARKS-60
Q1.
What is OSI model? Explain all its layers with diagram. [3+7] 10 marks
Answer.
Open Systems Interconnect (OSI) model
The Open Systems Interconnect (OSI)
model has seven layers. This article describes and explains them, beginning
with the 'lowest' in the hierarchy (the physical) and proceeding to the
'highest' (the application). The layers are stacked
Q2. Write a short note on ALOHA protocols. 10
marks
Answer.
ALOHA protocols
|
Aloha, also called the Aloha
method, refers to a simple communications scheme in which each source
(transmitter) in a network sends data whenever there is a frame to
send. If the frame successfully reaches the destination (receiver), the
|
Q3.
What is the function of data link layer? Explain the services of the data link
layer. [4+6] 10 marks
Answer.
Function of data link layer
The data link layer provides error-free transfer of data
frames from one node to another over the physical layer, allowing layers above
it to assume virtually error-free transmission over the link. To do this, the
data link layer
Q4.
Explain Shortest Path routing Algorithm. [10]
Answer.
Shortest Path routing Algorithm
This
technique is widely used because of its simplicity and easy to understand. It
is a static algorithm. Consider a subnet given in figure (a). Several algorithms for computing
shortest path between the two nodes of a graph are
Q5.
Discuss any two design issues of Session Layer. [10]
Answer.
Design issues of Session Layer
The
higher layers of OSI model consists of Session, Presentation and Application
layers. These upper layers are providing user-oriented services. They take the
bare-bones, error-free channel provide by the transport layer and add
Q6.
Explain Recursive queries and Iterative queries that a DNS resolver (either a
DNS client or another DNS server) can make to a DNS server. [5+5]
Answer.
Recursive queries and Iterative queries that a DNS resolver
can make to a DNS server
The two
types of queries that a DNS resolver (either a DNS client or another DNS
server) can make to a DNS server are the following:
Recursive
queries
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