22322 IMP Data Communication MSBTE Exam Important Questions
22322 IMP
The 22322 Data Communication MSBTE Exam is an examination administered by the Maharashtra State Board of Technical Education (MSBTE) in India. It likely covers topics related to data communication, which is the process of transmitting data from one location to another using electronic or optical means. Some possible topics that may be included on the exam are:
- Introduction to data communication and the various types of networks and communication systems
- Network protocols and standards, such as TCP/IP, Ethernet, and WiFi
- Data transmission techniques, including analog and digital signals, modulation, and multiplexing
- Network topologies, such as star, bus, and mesh, and their characteristics and uses
- Network security and protection, including encryption, firewalls, and virtual private networks (VPNs)
- Local area networks (LANs) and wide area networks (WANs) and their differences
- Case studies and examples of different types of data communication systems, such as the Internet, cellular networks, and satellite systems
1. Attempt any FIVE : 10
1. Define Protocol. Why it is needed ?
2. Define multiplexing. List its type.
3. Define switching. List its types.
4. List types of Wireless Media.
5. Define the term Communication medium.
6. Define Multiplexing. List its types.
7. Define (i) FHSS, (ii) DSSS.
8. Draw OSI model.
9. List features of 4G and Volte.
10. Define Protocol. State key elements of Protocol.
11. List different types of guided media.
12. List any four functions of Data link layer.
13. Enlist various IEEE standards for wireless communication. (any four)
14. Define line of sight propagation.
2. Attempt any THREE : 12
(a) Compare analog signal and digital signal. (any four points)
(b) Explain half duplex system and full duplex system with diagram.
(c) Explain satellite communication with diagram.
(d) Explain working of Packet and circuit switching.
(e) Explain the process of FSK modulation with diagram.
(f) Explain any four standard organizations.
(g) Compare amplitude modulation and frequency modulation (4 points).
(h) Explain process of phase shift keying.
3. Attempt any THREE : 12
(a) Calculate the baud rate for the given bit rate and type of modulation :
(i) 4000 bps, FSK
(ii) 6000 bps, ASK
(b) Draw and explain Coaxial, Fiber Optic cable & All Types of Cable.
(c) Draw and explain WDM.
(d) Explain the process of Cyclic Redundancy Check (CRC) with suitable example.
(c) Five channels each with 200 kHz bandwidth are multiplexed using FDM. Find minimum bandwidth of the link if guard band of 10 kHz is used.
(d) Assuming odd parity, find the parity bit for each of the following data unit :
(i) 1011010 (ii) 0010110
(iii) 1001111 (iv) 1100000
(e) Draw a BFSK waveform to represent the following bit stream 0 1 1 0 1 0
4. Attempt any THREE : 12
(a) Draw and explain PSK with waveforms.
(b) Draw and explain fiber optic cable.
(c) Calculate minimum number of bits in a PN sequence if we use FHSS with a channel bandwidth of B = 5KHz and BSS = 120 KHz.
(d) Explain selective reject ARQ.
(e) Draw Bluetooth architecture. Explain function of various layers.
(f) A signal carries five bits in each signal element. If 1600 signal elements are sent per second, find the baud rate and bit rate in kbps.
(g) Explain the reason for using different frequency bands for uplink and downlink in satellite communication.
(h) Explain the process of asynchronous TDM with example.
(i) Explain the process of Checksum with example.
(j) In bluetooth communication calculate the length of frame for following scenarios :
(i) Three slot
(ii) Five slot. Assume data rate = 1 mbps
(k) Explain the concept of pico net and scatter net of Bluetooth.
5. Attempt any TWO : 12
(a) Differentiate coaxial, twisted pair and fiber optic cables. (any six points)
(b) Explain LRC and VRC for error detection with suitable example.
(c) Explain WLAN with diagram. Also state its advantages and disadvantages.
(d) Explain Microwave transmission with its advantages and disadvantages.
(e) Draw and explain Mobile Telephone System Architecture.
(f) Compare first, second, third and fourth generation mobile telephone systems (any 3 points).
6. Attempt any TWO : 12
(a) Two channels one with a bit rate of 150 kbps and another with a bit rate of 140 kbps are to be multiplexed using pulse stuffing TDM with no synchronization bits. Answer the following questions.
(i) What is the size of a frame in bits ?
(ii) What is the frame rate ?
(iii) What is the duration of frame ?
(b) Explain stop and wait ARQ with example.
(c) In a digital medium with a data rate of 12 mbps. How many 64 kbps voice channels can be carried if DSSS is used with Barker sequence ?
(d) Explain process of synchronous time division multiplexing with its advantages.
(e) Explain the following multiplexing techniques with block diagram :
i) TDM
ii) FDM
(f) Explain the layered architecture of ISO-OSI model along with functions of each layer.