Brainlag PlusTransfer times from file size and bandwidth, bits against bytes, shared bandwidth, latency and packet counts.
Bits and bytes
Connection speeds are in bits per second (Mbps = megabits per second).
File sizes are in bytes (MB). One byte is 8 bits, so:
time (s) = file size in bits ÷ bandwidth in bits per second
a 25 MB file on a 40 Mbps line: 25 × 8 = 200 megabits, 200 ÷ 40 = 5 s
The most common slip is forgetting to multiply by 8.
The rest of this lesson and its 7 practice questions are in Plus.
Screen 1 of 3, free to read.
- 7 exam-style questions, marked as you go, each with a worked solution
- Anything you get wrong is saved to your flashcards