Computer Networks Unit 2 – Link Layer and Medium Access Control: important questions for AKTU
Unit 2 (Link Layer and Medium Access Control) questions that AKTU repeats most often. This unit carries about 38 marks per paper. Start with the repeated questions, then the most asked topics.
Most repeated Unit 2 questions
- Explain CSMA/CD with CSMA/CA with diagram. (10 marks, 2023, Medium Access Control) – also asked in 2018, 2019, 2022, 2024, 2025
- Explain CSMA/CD in detail. (10 marks, 2022, Medium Access Control) – also asked in 2018, 2019, 2023, 2024, 2025
- A bit stream x8+x6+x3+x2+x+1 is transmitted using CRC method. The generator polynomial is x4+x2+x+1. Show the actual codeword transmitted at the receiver side. Suppose the third bit from left is inverted during transmission. Show that this error is detected at the receiver end. (7 marks, 2025, Error Detection and Correction) – also asked in 2019, 2022, 2023, 2024
Most important Unit 2 topic
- Flow Control Protocols (Unit 2: Link Layer and Medium Access Control) – asked 14 times in 2018, 2019, 2022, 2023, 2024, 2025
Most asked Unit 2 topics
- Flow Control Protocols – asked 14 times
- Medium Access Control – asked 11 times
- Error Detection and Correction – asked 7 times
More Unit 2 previous year questions
- In what situations, contention-based MAC Protocols are suitable? (2 marks, 2025, Medium Access Control)
- Illustrate the concept of 'piggybacking'. (2 marks, 2025, Flow Control Protocols)
- Illustrate the concept of slotted ALOHA with suitable diagram. Measurement of slotted ALOHA channel with infinite number of users shows that 10% of slots are idle. Calculate i) What is the channel load? ii) What is the throughput? (7 marks, 2025, Medium Access Control)
- Define fixed and variable size framing. (2 marks, 2024, Flow Control Protocols)
- Explain the working of Bridge. (2 marks, 2024, Medium Access Control)
Unit 2 syllabus topics
- Framing
- Error Detection and Correction
- Flow Control Protocols
- Medium Access Control
- Bridges and Link Layer Switches