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Networks · Quiz 1 · 26 Oct 2025 (Afternoon)

18 questions · 50 marks · 60 min

Answer key Take as mock

Indian Institute of Technology Madras

BS Degree Programme · Examination & Study Paper

Computer Networks

Quiz 1 · 26 Oct 2025 (Afternoon)

Official Paper

Examination Instructions & Guidelines

Solve on notebook/paper first before checking solutions.
MCQ: Exactly 1 option is correct. Negative marking applies.
MSQ: One or more options correct. Select all to score.
NAT: Numerical response. No negative marking.
Scientific calculator allowed for all calculations.
Official answer key is sealed at the end of this sheet.

Q1MCQ1 Mark·Choose one option
Key ↓
In computer networking, an endpoint (or host) refers to a machine running a user application.
1. ATrue
2. BFalse
Q2MCQ1 Mark·Choose one option
Key ↓
The unique physical address of a device’s network interface card (NIC) is called a MAC address.
1. ATrue
2. BFalse
Q3MCQ1 Mark·Choose one option
Key ↓
In packet-switched networks, buffer management is important mainly to prevent packet loss during traffic spikes.
1. ATrue
2. BFalse
Q4MCQ1 Mark·Choose one option
Key ↓
In a TCP connection, a socket is uniquely identified only by the Source IP and Destination IP.
1. ATrue
2. BFalse
Q5MCQ1 Mark·Choose one option
Key ↓
If packet #7 is lost in Selective Repeat ARQ with a window size of 4, only 1 packet must be retransmitted.
1. ATrue
2. BFalse
Q6MCQ3 Marks·Choose one option
Key ↓
A switch needs to transmit a packet of size 10,000 bits over a link with a transmission rate of 100 Mbps. What is the transmission delay?
1. A5 × 10^(−5) seconds
2. B1 × 10^(−4) seconds
3. C2 × 10^(−6) seconds
4. DNone of these
Q7MCQ4 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D
5. E
Q8MCQ4 Marks·Choose one option
Key ↓
A link has a round-trip time (RTT) of 10 ms and a packet transmission time of 90 ms. In Stop-and- Wait ARQ, what percentage of the time is the sender actually transmitting (i.e., the utilization of the link)?
1. A50%
2. B75%
3. C90%
4. D95%
Q9MSQ2 Marks·Choose all correct options
Key ↓
1. AP
2. BQ
3. CR
4. DT
Q10NAT3 Marks·Write the number
Key ↓
Your answer:
Q11NAT3 Marks·Write the number
Key ↓
Your answer:
Q12NAT3 Marks·Write the number
Key ↓
Your answer:
Q13NAT3 Marks·Write the number
Key ↓
Your answer:
Q14NAT3 Marks·Write the number
Key ↓
Your answer:
Q15NAT3 Marks·Write the number
Key ↓
Your answer:
Q16NAT4 Marks·Write the number
Key ↓
Your answer:
Q17NAT5 Marks·Write the number
Key ↓
Your answer:
Q18NAT5 Marks·Write the number
Key ↓
Your answer:

Official Key

Master Answer Key & Explanations

Official answer keys from IIT Madras BS past papers. Click any question to review.

Reveal Key

Q1A

Q2A

Q3A

Q4B

Q5A

Q6B

Q7C

Q8C

Q9B, C

Q10240

Q114

Q1280

Q13112.5

Q1414

Q153

Q164

Q172.86

Q187

Questions and answer keys are reproduced from the official IIT Madras BS papers. BTechi is not affiliated with IIT Madras.