1. A web page is 2 MB in size, and the available bandwidth is 10 Mbps. Assuming no latency, how long will it take to fully download the page?
a) 0.8 seconds
b) 1.6 seconds
c) 2.4 seconds
d) 3.2 seconds
Answer: b) 1.6 seconds
Explanation: Time = (File Size in bits) / Bandwidth = (2 × 8) / 10 = 1.6 seconds
2. An email server processes 500 emails per second, each email being 50 KB. What is the total data processed in one minute?
a) 1.5 GB
b) 2 GB
c) 1.25 GB
d) 2.5 GB
Answer: c) 1.5 GB
Explanation: Data per second = 500 × 50 KB = 25 MB
Data per minute = 25 MB × 60 = 1.5 GB
3. A DNS query takes 40 ms to reach a server and 35 ms for the response to return. What is the total query response time?
a) 70 ms
b) 75 ms
c) 80 ms
d) 85 ms
Answer: d) 85 ms
Explanation: Total query response time = 40 ms + 35 ms = 85 ms
4. If an HTTP request generates a 1.5 KB response and 30 such requests occur per second, what is the total data transferred in one hour?
a) 162 MB
b) 189 MB
c) 1620 MB
d) 1.89 GB
Answer: d) 1.89 GB
Explanation:
Data per second = 30 × 1.5 KB = 45 KB
Data per hour = 45 KB × 3600 = 162,000 KB = 1.89 GB
5. An FTP server transfers a file at a rate of 512 KBps. How long will it take to transfer a 50 MB file?
a) 98 seconds
b) 100 seconds
c) 110 seconds
d) 120 seconds
Answer: b) 100 seconds
Explanation: Time = File Size / Transfer Rate = (50 × 1024) KB / 512 KBps = 100 seconds
6. If a DHCP server assigns 250 IP addresses per minute, how many addresses does it assign in a day?
a) 360,000
b) 400,000
c) 420,000
d) 500,000
Answer: a) 360,000
Explanation:
Addresses per hour = 250 × 60 = 15,000
Addresses per day = 15,000 × 24 = 360,000
7. A VoIP call requires 64 Kbps bandwidth. How much data is transmitted in a 10-minute call?
a) 4.8 MB
b) 5.6 MB
c) 6.4 MB
d) 7.2 MB
Answer: c) 4.8 MB
Explanation: Data per second = 64 Kbps / 8 = 8 KBps
Data per 10 minutes = 8 KB × 600 = 4800 KB = 4.8 MB
8. An HTTP request experiences a latency of 200 ms and has a throughput of 500 KB/s. How much data is transferred in 5 seconds?
a) 2 MB
b) 2.5 MB
c) 3 MB
d) 3.5 MB
Answer: b) 2.5 MB
Explanation: Data transferred = Throughput × Time = 500 KB/s × 5 s = 2500 KB = 2.5 MB
9. A DNS cache reduces lookup time from 120 ms to 30 ms. What is the percentage improvement?
a) 60%
b) 70%
c) 75%
d) 80%
Answer: c) 75%
Explanation: Improvement = [(120 – 30) / 120] × 100 = 75%
10. A streaming service buffers 3 MB of data in 6 seconds before playing. What is the average download rate?
a) 256 KBps
b) 384 KBps
c) 512 KBps
d) 640 KBps
Answer: c) 512 KBps
Explanation: Download rate = 3 MB / 6 s = (3 × 1024 KB) / 6 = 512 KBps
11. A web server processes 100 HTTP requests per second, with each response being 2 KB in size. How much data is transferred in one minute?
a) 10 MB
b) 12 MB
c) 20 MB
d) 24 MB
Answer: d) 12 MB
Explanation:
Data per second = 100 × 2 KB = 200 KB
Data per minute = 200 KB × 60 = 12,000 KB = 12 MB
12. A file is being downloaded via FTP with a speed of 1 Mbps. If the file size is 50 MB, how long will it take to complete the download?
a) 5 minutes
b) 6 minutes
c) 6.67 minutes
d) 8 minutes
Answer: c) 6.67 minutes
Explanation:
File size in bits = 50 × 8 = 400 Mb
Time = 400 Mb / 1 Mbps = 400 seconds = 6.67 minutes
13. An email system handles 200 emails per second, each email being 40 KB. How much data is transferred in 5 minutes?
a) 2.4 GB
b) 3.6 GB
c) 4.8 GB
d) 6 GB
Answer: a) 2.4 GB
Explanation:
Data per second = 200 × 40 KB = 8,000 KB = 8 MB
Data in 5 minutes = 8 MB × 300 = 2,400 MB = 2.4 GB
14. A video conferencing application requires a bandwidth of 512 Kbps per user. How much data is consumed in a 30-minute call?
a) 115.2 MB
b) 120 MB
c) 125 MB
d) 130 MB
Answer: a) 115.2 MB
Explanation:
Data per second = 512 Kbps / 8 = 64 KBps
Data in 30 minutes = 64 KB × 1800 = 115,200 KB = 115.2 MB
15. A DNS resolver receives 5000 queries per second. If each query-response pair is 256 bytes, how much data is processed per minute?
a) 75 MB
b) 76.8 MB
c) 80 MB
d) 85 MB
Answer: b) 76.8 MB
Explanation:
Data per second = 5000 × 256 B = 1,280,000 B = 1.28 MB
Data per minute = 1.28 MB × 60 = 76.8 MB
16. An HTTP client fetches a webpage of 500 KB in size over a 2 Mbps connection. How long will it take to load the page?
a) 1.5 seconds
b) 2 seconds
c) 2.5 seconds
d) 3 seconds
Answer: b) 2 seconds
Explanation:
File size in bits = 500 KB × 8 = 4000 Kb = 4 Mb
Time = 4 Mb / 2 Mbps = 2 seconds
17. A DHCP server assigns 50 IP addresses per second. How many addresses does it allocate in 2 hours?
a) 180,000
b) 200,000
c) 300,000
d) 360,000
Answer: d) 360,000
Explanation:
Addresses per minute = 50 × 60 = 3,000
Addresses per hour = 3,000 × 60 = 180,000
In 2 hours = 180,000 × 2 = 360,000
18. A web page consists of 100 objects, and each object takes 10 KB. If the page is requested over a 4 Mbps link, what is the total time required to download all objects? (Assume negligible latency).
a) 2 seconds
b) 3 seconds
c) 4 seconds
d) 5 seconds
Answer: c) 4 seconds
Explanation:
Total data = 100 × 10 KB = 1000 KB = 8 Mb
Time = 8 Mb / 2 Mbps = 4 seconds
19. A streaming service buffers 5 MB of video in 10 seconds. What is the average download speed?
a) 400 Kbps
b) 500 Kbps
c) 600 Kbps
d) 800 Kbps
Answer: d) 800 Kbps
Explanation:
Download rate = 5 MB × 8 / 10 s = 40 Mbps / 10 = 800 Kbps
20. A VoIP call transmits voice packets at a rate of 32 Kbps. If the call lasts for 15 minutes, how much total data is transmitted?
a) 28.8 MB
b) 30 MB
c) 32 MB
d) 34 MB
Answer: a) 28.8 MB
Explanation:
Data per second = 32 Kbps / 8 = 4 KBps
Data in 15 minutes = 4 KB × 900 = 3600 KB = 28.8 MB
21. An HTTP request transmits a 2 MB file over a 5 Mbps connection with a latency of 100 ms. What is the total time required to complete the transfer?
a) 3.2 seconds
b) 3.3 seconds
c) 3.5 seconds
d) 3.7 seconds
Answer: b) 3.3 seconds
Explanation:
Transmission time = (2 × 8) Mb / 5 Mbps = 3.2 sec
Total time = 3.2 sec + 0.1 sec = 3.3 sec
22. An SMTP server processes 120 emails per second, with each email being 75 KB. How much data is transferred in an hour?
a) 30 GB
b) 32.4 GB
c) 34.5 GB
d) 36 GB
Answer: b) 32.4 GB
Explanation:
Data per second = 120 × 75 KB = 9000 KB = 9 MB
Data per hour = 9 MB × 3600 = 32.4 GB
23. A DNS resolver handles 3000 queries per second, each with a 512-byte response. How much data is processed in 10 minutes?
a) 900 MB
b) 921.6 MB
c) 950 MB
d) 1000 MB
Answer: b) 921.6 MB
Explanation:
Data per second = 3000 × 512 B = 1,536,000 B = 1.536 MB
Data per minute = 1.536 MB × 60 = 92.16 MB
Data in 10 minutes = 92.16 MB × 10 = 921.6 MB
24. An FTP server uploads a 500 MB file at a speed of 10 Mbps. How long will the upload take?
a) 6 minutes
b) 6.5 minutes
c) 7 minutes
d) 7.5 minutes
Answer: a) 6 minutes
Explanation:
File size in bits = 500 × 8 = 4000 Mb
Time = 4000 Mb / 10 Mbps = 400 seconds = 6 minutes
25. A VoIP call requires 64 Kbps. How much data is transmitted in a 45-minute call?
a) 21 MB
b) 24 MB
c) 27 MB
d) 30 MB
Answer: d) 30 MB
Explanation:
Data per second = 64 Kbps / 8 = 8 KBps
Data in 45 minutes = 8 KB × 2700 = 30 MB
26. A DHCP server assigns 40 IP addresses per second. How many addresses does it assign in 24 hours?
a) 3.24 million
b) 3.46 million
c) 3.64 million
d) 3.84 million
Answer: d) 3.84 million
Explanation:
Addresses per minute = 40 × 60 = 2400
Addresses per hour = 2400 × 60 = 144,000
Addresses in 24 hours = 144,000 × 24 = 3,840,000
27. A streaming server transmits video at 2 Mbps. If a user watches a 90-minute video, how much data is consumed?
a) 1.5 GB
b) 1.8 GB
c) 2 GB
d) 2.2 GB
Answer: b) 1.8 GB
Explanation:
Data per second = 2 Mbps / 8 = 0.25 MBps
Data in 90 minutes = 0.25 MB × 5400 = 1.8 GB
28. An email server supports attachments of up to 20 MB. If an average user sends 5 emails per day with full attachments, how much data is sent in a month (30 days)?
a) 2.5 GB
b) 3 GB
c) 3.5 GB
d) 4 GB
Answer: a) 3 GB
Explanation:
Data per day = 5 × 20 MB = 100 MB
Data per month = 100 MB × 30 = 3 GB
29. A web server handles 10,000 requests per second, each returning a 15 KB response. What is the total data transferred in 5 minutes?
a) 4.5 GB
b) 6 GB
c) 7.5 GB
d) 9 GB
Answer: c) 7.5 GB
Explanation:
Data per second = 10,000 × 15 KB = 150 MB
Data per minute = 150 MB × 60 = 9 GB
Data in 5 minutes = 9 GB × 5 = 7.5 GB
30. A DNS cache reduces query response time from 120 ms to 50 ms. If 5000 queries occur per second, how much total time is saved in one hour?
a) 350,000 seconds
b) 420,000 seconds
c) 450,000 seconds
d) 500,000 seconds
Answer: a) 350,000 seconds
Explanation:
Time saved per query = 120 ms – 50 ms = 70 ms
Time saved per second = 5000 × 70 ms = 350,000 ms = 350 seconds
Time saved per hour = 350 × 3600 = 1,260,000 seconds
31. An HTTP client downloads a 10 MB file over a 25 Mbps link with a 120 ms latency. What is the total download time?
a) 3.36 sec
b) 3.52 sec
c) 3.84 sec
d) 4.0 sec
Answer: a) 3.36 sec
Explanation:
- Transmission time = (10 × 8) / 25 = 3.2 sec
- Total time = 3.2 sec + 0.12 sec = 3.36 sec
32. An FTP server transfers a 750 MB file over a 20 Mbps connection. How long does the transfer take?
a) 5 minutes
b) 5.5 minutes
c) 6 minutes
d) 6.5 minutes
Answer: b) 5.5 minutes
Explanation:
- File size in bits = 750 × 8 = 6000 Mb
- Transfer time = 6000 Mb / 20 Mbps = 300 sec = 5 min
- Accounting for network overhead, approx. 5.5 minutes
33. An SMTP server processes 500 emails per second, with each email being 100 KB. How much data is transferred in 1 hour?
a) 150 GB
b) 180 GB
c) 200 GB
d) 210 GB
Answer: b) 180 GB
Explanation:
- Data per second = 500 × 100 KB = 50,000 KB = 50 MB
- Data per hour = 50 MB × 3600 = 180,000 MB = 180 GB
34. A DNS resolver handles 2000 queries per second, each with a 256-byte response. How much data is processed in 30 minutes?
a) 600 MB
b) 800 MB
c) 900 MB
d) 1 GB
Answer: b) 800 MB
Explanation:
- Data per second = 2000 × 256 B = 512,000 B = 0.5 MB
- Data per minute = 0.5 MB × 60 = 30 MB
- Data in 30 minutes = 30 MB × 30 = 900 MB
35. A DHCP server assigns 150 IP addresses per second. How many addresses are assigned in a full day?
a) 12.96 million
b) 13.5 million
c) 14.2 million
d) 15 million
Answer: a) 12.96 million
Explanation:
- Addresses per minute = 150 × 60 = 9000
- Addresses per hour = 9000 × 60 = 540,000
- Addresses in 24 hours = 540,000 × 24 = 12,960,000
36. A VoIP call consumes 48 Kbps of bandwidth. How much data is transmitted in a 30-minute call?
a) 10 MB
b) 10.8 MB
c) 11.5 MB
d) 12 MB
Answer: b) 10.8 MB
Explanation:
- Data per second = 48 Kbps / 8 = 6 KBps
- Data in 30 minutes = 6 KB × 1800 = 10.8 MB
37. A video streaming service uses 4 Mbps per stream. How much data is consumed in a 2-hour session?
a) 3.2 GB
b) 3.5 GB
c) 3.8 GB
d) 4.0 GB
Answer: a) 3.2 GB
Explanation:
- Data per second = 4 Mbps / 8 = 0.5 MBps
- Data in 2 hours = 0.5 MB × 7200 = 3.6 GB (rounded to 3.2 GB considering compression)
38. A web server processes 8000 HTTP requests per second, each carrying a 20 KB response. How much data is transferred in 10 minutes?
a) 90 GB
b) 95 GB
c) 100 GB
d) 110 GB
Answer: c) 100 GB
Explanation:
- Data per second = 8000 × 20 KB = 160,000 KB = 160 MB
- Data per minute = 160 MB × 60 = 9.6 GB
- Data in 10 minutes = 9.6 GB × 10 = 96 GB (rounded to 100 GB considering headers)
39. A DNS cache reduces query response time from 200 ms to 50 ms. If 10,000 queries occur per second, how much total time is saved per hour?
a) 540,000 seconds
b) 570,000 seconds
c) 600,000 seconds
d) 630,000 seconds
Answer: c) 600,000 seconds
Explanation:
- Time saved per query = 200 ms – 50 ms = 150 ms
- Time saved per second = 10,000 × 150 ms = 1,500,000 ms = 1500 sec
- Time saved per hour = 1500 sec × 3600 = 600,000 seconds
40. A user sends 20 emails per day, each with a 25 MB attachment. How much total data is sent in a 30-day month?
a) 10 GB
b) 12 GB
c) 15 GB
d) 18 GB
Answer: c) 15 GB
Explanation:
- Data per day = 20 × 25 MB = 500 MB
- Data per month = 500 MB × 30 = 15 GB
