Previous year question paper for DCN (Diploma Information Technology 3rd)

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Data Communication and Networks

Previous year question paper with solutions for Data Communication and Networks from 2012 to 2013

Our website provides solved previous year question paper for Data Communication and Networks from 2012 to 2013. Doing preparation from the previous year question paper helps you to get good marks in exams. From our DCN question paper bank, students can download solved previous year question paper. The solutions to these previous year question paper are very easy to understand.

1. Communication Basics (06 Hours)

Data  Communication,  Communication  Model  –  Components,  Data  Representation, 

Data Flow – Simplex, Half‐Duplex and Full‐Duplex, Communication Modes – Serial and 

Parallel  Transmission,  Synchronous  and  Asynchronous  Transmission,  Network 

Topologies,  Protocols  and  Standards,  Introduction  to  ISO/OSI  Model  for  Computer 

Networks 

2. Data Transmission (10 Hours)

Analog and Digital Data, Analog and Digital Signals, Periodic Analog Signals – Period, 

Frequency,  Phase  and Wavelength,  Composite  Signals,  Digital  Signals  –  Bit  Rate,  Bit 

Length, Digital Transmission – Baseband and Broadband, Transmission impairments, 

Data  Rate  Limits  –  Nyquist  and  Shannon  Capacities,  Performance  Metrics  – 

Bandwidth,  Throughput,  Latency  and  Jitter,  Transmission  Media  (Principles, 

Characteristics, Performance and Applications) – Guided (Twisted Pair, Coaxial cable, 

Optical Fiber) and Unguided (Radio wave, Microwave, Infrared wave, Light wave) 

3. Communication Signaling (08 Hours)

Modulation, Need for modulation, Analog to Analog Modulation (AM, FM, PM), Digital 

to  Analog  (ASK,  FSK,  PSK),  Analog  to  Digital  (PCM),  Digital  to  Digital  (Line  coding, 

Block coding)                  

4. Error Detection and Correction Techniques (08 Hours)

Error, Types of Errors, Error Rate, Error Detection and Correction Techniques – Block 

Coding (Parity Check, Hamming Codes), Cyclic Codes (CRC), Checksum 

5. Data Link Control (08

Framing, Flow Control, Stop and wait protocols, Sliding window protocol

6. Bandwid h Management (08 Hours)

Multiplexing  and  Spreading,  Type  of  Multiplexing  (TDM,  FDM,  WDM),  Spread 

Spectrum  –  FHSS,  DSSS,  Switching  Techniques  –  Circuit  Switching  and  Packet 

Switching 

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