7. What is encapsulation and decapsulation? How is it used in a network?8. Assume that the number of users of the Internet at the beginning of 2015 (January 1) is 250 million. If the growth of users increases by 15% per year, how many users will be using the Internet at the beginning of 2021 (January 1)?9. In the TCP/IP protocol suite, the Network layer is primarily responsible for what tasks? Name the main protocols that function at the Network layer.10. Assume we need to download text document

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