Root Servers

Summary

• What are the Root Servers?• DNS & stuff• THE Root Servers• Shutdown the Internet?• Conclusion

What are the Root Servers?

- 1st step resolving host names- Answer record in root zone- 13 servers addresses- With anycast 632 servers

DNS & stuff

- Essential to the Internet- Phone book- Map name to Internet ressources- Type of records:

- SOA- A/AAAA- MX- NS- PTR- CNAME

DNS & stuff

ARPANET Early packet switching

- Telephone during business hours to the NIC- Add manually

HISTORICALLY

DNS & stuffAnycast addressing

One-to-nearest association

- Clusters of hosts- 12/13 exist in multiple locations

For example: Root server H exists in 2 US location

DNS & stuffAuthoritative name servers

- Can me primary or secondary server

DNS & stuffRegrouping all the information

VIDEO 1

THE Root ServersWho is running them?

THE Root ServersWhere are they situated?

Shutdown the Internet?

VIDEO 2

Conclusion

Do you have any questions?