Past Guess Paper Fiber Optics Communication Networks

Paper 1 : Fiber Optics Communication Networks

Fiber Optics Communication Networks Past Guess Paper.

University Name – Confidential

NOTE: Q.1 is compulsory, attempt any four questions from the remaining. All questions carry equal marks. Phones and other Electronic Gadgets are not allowed. Paper   : Fiber Optics Communication Networks Time Allowed: 3 hours Examination:   Final, Fall – 2020 Total Marks:    70, Passing Marks (35) Q.1      True/False                                                                                                                

1. A circuit-switched network provides circuit-switched connections to its customers.
2. In classical layered hierarchy data link layer come after physical layer.
3. The network layer usually provides virtual circuits or datagram services to the higher layer.
4. Above the data link layer resides the network layer.
5. The transport layer resides on top of the network layer.
6. The wavelength λ and frequency f are related by the equation c = f λ
7. In packet-switched networks, the data stream is broken up into small packets of data.

Q.2      Explain telecommunication network architecture also draws its structure. Q.3      Discuss in detail Optical fiber as a waveguide using Wave Theory Approach. Q.4      What do you mean by services also explain circuit switching and packet switching. Q.5      Using proper diagram explain optical packet switching. Q.6      How you will explain Intermodal Dispersion also explains Multimode and Single-Mode Fiber. Q.7      Explain deeply Chromatic Dispersion also draws the shape of the pulse as a function of time. Q.8      Write short notes on any two of the following

1. Wavelengths
2. Frequencies
3. Channel Spacing

Paper 2 : Fiber Optics Communication Networks

Fiber Optics Communication Networks Past Guess Paper.

University Name – Confidential

NOTE: Q.1 is compulsory, attempt any four questions from the remaining. All questions carry equal marks. Phones and other Electronic Gadgets are not allowed. Paper   : Fiber Optics Communication Networks Time Allowed: 3 hours Examination:   Final, Fall – 2020 Total Marks:    70, Passing Marks (35) Q1:      Describe the key advantages of Fiber-Optics as a medium for long distance communication. Q2:      Explain how Optical-Amplifier and WDM can enhance the bandwidth and decline the losses and attenuation in optical communication. Q3:      a) Discuss the TIR that causes the signal to reach the destination within the fiber optic cable.

2. b) Consider an optical fiber of 2.5 Km Long is feeded with an Input Power of 1mW. If the Attenuation Coefficient is 0.2dB/km, determine the Output Power at the receiving end.

Q4:      Explain the appropriateness of either LASER or LED optical source in single and multimode optical fiber. Q5:      A silica optical fiber has a core refractive index of 1.48 and cladding refractive index of 1.45. Determine:

1. The critical angle at the core-cladding interface
2. The NA for the fiber

Q6:      Discuss how the SDH multiplexing technique is used to combine the low data rate users for transmission over high bandwidth optical fiber medium. Q7:      Write short note on any two of the following

1. Optical detectors
2. Add/Drop Multiplexer
3. Intermodal Dispersion