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PROGRAM
Master of Science in Information
Technology(MSc IT)Revised Fall 2011
SEMESTER
3
SUBJECT CODE & NAME
MIT3031– High Speed Networks
Qus:1 Explain the advantages of
packet switching over the circuit switching.
Answer: This approach is having
number of advantages over the circuit switching:
1. Line Efficiency:
In this case line efficiency is greater because single
node-to-node can be dynamically shared by many packets over the time where as
in circuit switching, time on a node-to-node link is pre allocated
Qus:2 Describe Multi-server queue
using suitable diagrams and equations.
Answer: The aim of the queuing analysis is
to make use of analytic models to yield
the desired parameters to determine the buffer size. The following two queuing models can be used as
analytic models:
Qus:3 What
is meant by congestion? List and describe different types of congestion.
Answer: The situation wherein network
resources are constantly overloaded or the overall demand of a resource exceeds
its capacity is termed as congestion. Congestion in a network occurs
Qus:4 In TCP what is timer? List the
timers that TCP maintains for every connection and explain any three.
Answer:
In TCP protocol, timers are applied
in various positions and these timers
restrain retransmissions and restrict the hold time for lost packets. Jiffies variable is the basis for all
timers. Function pointers in a timer structure
take a behavior function when initialized. Once the timer ends, this function
is invoked. The time at which the timer ends is based on the expired field. The
Qus:5 What
is meant by Resource Reservation Protocol (RSVP)? Write any three salient
characteristics. List RSVP traffic types and explain any two.
Answer: RSVP is a signaling protocol that
offers reservation setup and control. It enables Integrated Services (IntServ)
which is designed to emulate circuits on the Internet. This is the most complex
QoS technology for elements of a network (routers, switches) and applications
(hosts). But, it provides the highest QoS level when we consider guarantee of
service, granularity of
Qus:6 Describe
Routing Information Protocol (RIP) message format with suitable diagram. Write
two benefits and two drawbacks of RIP.
Answer: RIP is based on distance vector
routing. It implements vector routing using the following considerations:
An AS has both
routers
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