How do the different layers of e protocol hierarchy interact with each other? Why do we need to have two different layers that work on error detection and correction?

Which statement is true of web-based social media? a. they allow consumers to interact with and update content. b. they cannot be updated easily, as compared to print media. c. they are expensive to produce and maintain, as compared to print and television. d. they can exist independent of the internet.

What is a point-in-time measurement of system performance?

Which company provides a crowdsourcing platform for corporate research and development? a: mtruk b: wiki answers c: mediawiki d: innocentive