[Winter
2014] ASSIGNMENT
PROGRAM - Master of Science in Information
Technology (MSc IT)
SEMESTER - 2
SUBJECT CODE & NAME - MIT204– Data
Communication & Networking
CREDIT –
4 BK ID - B1389 MAX. MARKS - 60
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1 Write
about transmission impairments.
Answer:
Analog signal
consist of varying a voltage with time to represent an information steam. If
the transmission media were perfectly, the receiver could receive exactly the
same signal that the transmitter sent. But communication lines are usually not
perfect, so the receive signal is not the same as the transmitted
2. Explain
the major criteria for a Data Communication Network
Answer:
The major
criteria that a Data Communication Network must meet are:
Performance
Consistency
Reliability
Recovery
Security
1.
Performance
Performance is the defined as the rate of transferring error
free data. It is measured by the Response
3. Write
a note on a) 10Base2 b) 10Base- T
Answer:
10Base2:
10BASE2 (also known as cheapernet, thin Ethernet, thinnet,
and thinwire) is a variant of Ethernet that uses thin coaxial cable (RG-58A/U
or similar, as opposed to the thicker RG-8 cable used in 10BASE5 networks),
terminated with BNC connectors. During the mid to late 1980s this was the
dominant 10
4 What
do you mean by congestion? Explain
Answer:
Definition: Congestion is
a major problem when traffic in the network is very high.
When too many packets
are present in (a part of) the subnet, performance degrades. This situation is
called congestion.
5 Explain
the following
a)
Class A networks
b)
Class B networks [5+5] 10
Answer:
Class A
networks
Each Class A
network address has an 8-bit network-prefix with the highest order bit set to 0
and a seven-bit network number, followed by a 24-bit host-number. Today, it is
no longer considered 'modern' to refer to a Class A network. Class A networks
are now referred to as "/8s" (pronounced "slash eight" or
just "
6.Explain
the following.
a) Open
loop congestion control
b)
Closed loop congestion control
Answer: Open Loop Congestion Control
• In this method,
policies are used to prevent the congestion before it happens.
• In this
method of congestion control, congested router or node sends a special type of
packet called
7. List
the various categories of network security problems.
Answer: Network security problems
can be divided roughly into four categories:
1) Secrecy:
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on 08791490301, 08273413412
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