Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 8th Semester (Eight Semester) 2016-17 EEC031 Optical Networks Question Paper
B.TECH.
THEORY EXAMINATION (SEM?VIII) 2016-17
OPTICAL NETWORKS
T ime : 3 Hours Max. Marks : 100
Note .' Be precise in your answer. In case ofnumericalproblem assume data wherever not provided.
SECTION ? A
1. Explain the following: 10 x 2 = 20
(a) What do you understand by all-optical and opaque optical network?
(b) Differentiate between circuit switching and packet switching.
(c) Discuss the principle of operation of re?ections grating.
(d) What do you understand by multiplexer and filters in optical network?
(e) What are point to point links in optical network?
(1) What is SONET/SDH concatenation?
(g) What are wavelength converters? Mentions their types
(h) What are solitons? How they are capable of reducing the non?linear effects?
(i) Explain gigabit and VLAN Ethernet frames.
(j) How do we arrive at 51.84 Mbps basic transmission rate in SONET/SDH?
SECTION ? B
2. Attempt any ?ve of the following questions: 5 x 10 = 50
(a) Explain the reasons for growing demand of optical networks. What are the key
networks elements that enable optical networking?
(b) Mention the advantages offered by optical amplifiers over regenerators. Explain
principle of operation of EDFA.
(c) Explain the structure and properties of VCSELs laser. Also tells about the different
tuning mechanisms
(d) Explain OTDM with a function of a bit interleaved optical multiplexer?
(e) What do you understand by spectral efficiency? Explain about optical Duobinary
modulation with the help of mathematical expression.
(1) With a neat diagram, explain the OTN frame structure. Also explain OTN hierarchy in
detail. Why is this hierarchy more elaborate than SONET/SDH?
(g) Why SONET/SDH are called self healing. Explain the protection technique
implemented in SONET/SDH rings?
(h) Explain the functions performed by Routers in photonic packet switched (PPS)
networks?
SECTION ? C
Attempt any two of the following questions: 2 x 15 = 30
3. Differentiate between Light Path Topology(LTD) problem and Routing and Wavelength
assignment problem(RWA). For a point to point WDM ring design topology, calculate design
parameters required in determining and minimizing network cost?
4. Explain the optical switching on the basis of optical Cross Connect & Optical Burst Switching.
5. What are the different ways deployed for increasing transmission capacity in optical networks?
Explain architectural choices for deploying next generations transport networks.
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This post was last modified on 30 January 2020