Hi. I need help to answer these questions for networking

You are designing a link with a 1 msec one-way latency and a bandwidth of 10Mbps. The link spans a distance of ten miles, and the computers connected to it operate at 450MHz. How many bits will need to be transmitted before the first reply can be expected from the destination machine? Explain the difference between a service interface and a peer interface. Which is used by protocols on the same machine? Which is more commonly used the OSI network architecture or the Internet architecture? Give at least one reason why this architecture is more successful