purpose of the Handshake Protocol in SSL

purpose of the Handshake Protocol in SSL
1. What is the purpose of the Handshake Protocol in SSL?
2. What is the purpose of the Record Protocol in SSL?
3. What is the purpose of a firewall?
4. What are the two types of firewalls?
5. What is a VPN and why is it needed?
6. How do LANs on a fully private internet communicate?
purpose of the Handshake Protocol in SSL