1. Explain how headers are added and removed as data passes through a layered protocol stack. 2. Assume that one hundred million new computers are added to the Internet each year. If computers are...

1. Explain how headers are added and removed as data passes through a layered protocol stack.

2. Assume that one hundred million new computers are added to the Internet each year. If computers are added at a uniform rate, how much time elapses between two successive additions?

3. What shift in Internet use occurred when the World Wide Web first appeared?