hello i have 15 minutes. Could you answer these quesitons?

4. Which protocol is a connectionless transport layer protocol? (1 punkt) 5. Which set of protocols is used when the host communicates with the web server after typing a website address into the host's web browser? (1 punkt) HITP. ICMP, IP FTP, UDP, IP HTTP. UDP. IP HTTP, TCP, IP 6. What is ISA Server's function in the Windows operating system? (1 punkt) It is a file sharing system It acts as a firewall Is a website senver Resolves domain names 7. How many layers are defined by the iso / osi model: 9 7 3