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Winter
2015 ASSIGNMENT
PROGRAM
MCA(REVISED FALL 2012)
SEMESTER
THIRD
SUBJECT
CODE & NAME MCA3050- ADVANCED COMPUTER NETWORKS
CREDIT 4 BK ID B1650 MAX.
MARKS 60
Q.
No. 1 Describe OSI Model. List and explain its seven layers. 3+7 10
Answer: OSI model
The Open Systems Interconnection (OSI)
reference model was defined by the International Standards Organization (ISO)
as
Q2.
Describe about DWDM. Explain the components of a basic DWDM system 10
Answer: Dense
Wavelength Division Multiplexing (DWDM): In previous unit we discussed
about WDM (Wavelength Division Multiplexing). It is conceptually similar
to frequency division multiplexing. Only difference is, it is
purposefully designed for fibre-optic cable to support high data-rate.
In the literature, the term dense WDM (DWDM) is often used. This term
does not imply a different technology to that used for WDM. In fact, the
two terms are used interchangeably. WDM, DWDM are based on the same concept of using multiple wavelengths of light on a single
fiber,
Q3.
Describe Peak cell rate (PCR) and Sustained cell rate (SCR). 10
Answer: Peak cell rate
(PCR): This is the maximum amount of traffic that can be submitted by a source
to an ATM network, and is expressed as ATM cells per second. Due to the
fact the transmission speeds are expressed in bits per second. It is
more convenient to talk about the peak bit rate of a source, i.e., the
maximum number of bits per second submitted to an ATM connection, rather
than its peak cell rate. The
Q4
Describe the following:
a)
Open Shortest Path First (OSPF) protocol
b)
Broader Gateway Routing Protocol (BGP) 5+5 10
Answer:
a)
Open Shortest Path First (OSPF) protocol
OSPF is a commonly deployed link-state routing protocol. It
views the Internet as a star configuration. OSPF
Q5
Write short notes on:
a)
Cryptography
b)
Encryption
c)
Decryption
d)
Cryptanalysis
e)
Cryptology 5*2 10
Answer: a) Cryptography
Most initial computer applications had no or at best, very
little security. This continued for a number of years and until the importance
of data is truly realized. Until then, computer data was considered to be
Q6
Differentiate Single server queue and Multi-server queue 5+5 10
Answer:
Single server queue
The important element in a single server queue is the server,
which provides services to packets. Different packets arrive at the system to
be served. If the server is idle at the time of packet arrival, the packet is
served
Get fully solved assignment. Buy online from website
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