Can a domain name have a period?

Related questions

1. Can a domain name contain numbers?
2. Are underscores allowed in domain names?
3. What are the three basic elements of an e mail message?
4. What are email etiquettes?
5. Is hostname same as computer name?
6. Do all email addresses have?
7. What symbols are allowed in a domain name?
8. What is the .com called?
9. Is http secure?
10. What is a Mexican RFC?

Tags

1. #website
2. #domain
3. #search
4. #registered
5. #hyphens
6. #names
7. #cannot
8. #advise
9. #forget
10. #people
11. #under
12. #dashes
13. #rules
14. #periods
15. #wouldn
16. #competitor
17. #hyphen