1. What are the differences between TCP and UDP, and what are their typical use cases?
2. What are the main functions of a firewall in network security?
3. Explain the differences between IPv4 and IPv6.
4. How does a VPN (Virtual Private Network) work, and what are its benefits?
5. What role does a DNS server play in a network?
6. Explain the concept of subnetting and its purpose in networking.
7. What is the difference between a hub, a switch, and a router?
8. How does the OSI model differ from the TCP/IP model?
9. Describe how to set up a secure FTP server using SSH.