There is a file of size 2 MB. How long does it take to download this file using a 1-Mbps channel?

Solution:

To calculate the time it takes to download a file using a channel with a certain bandwidth, you can use the formula:

Download Time = File Size / Bandwidth

In this case, the file size is 2 MB, which is equivalent to 16 million bits (since 1 byte = 8 bits), and the channel bandwidth is 1 Mbps (1,000,000 bits per second).

So, substituting these values into the formula, we get:

Download Time = 16,000,000 bits / 1,000,000 bits per second

Simplifying this expression, we get:

Download Time = 16 seconds

Therefore, it would take 16 seconds to download a file of size 2 MB using a 1-Mbps channel.