1. 1.What is a firewall and what does it do?
2. 2.How does the VPN work?
3. 3.Explain, how does crypto work?  Present some examples.
4. 4.Describes how IPsec and SSL/TLS work.
5. 5.How do the cryptography and security components of the Internet affect the performance of companies in the service and production of goods?
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7. Can you answer with more than five sentences for each question to have more information.