App layer protocols
- When sending an email using the SMTP protocol the body of the email ends with a line consisting of a single period. Is it possible to send a line with a single period in the body of the mail?
- Explain the difference between an iterative query and a recursive query in DNS.
- Is it possible to have a working webserver with an IP, that is not registered in the DNS system? Explain your answer. Do you know of somewhere this is used?
- When using FTP, you can use either passive or active FTP. What is the difference?