1. ravel@sparcs

2. DNS ravelsparcs.orgorg blog.naver.comnaver.comcom 1 10 2 3 4 5 6 7 8 9

3. DNS sparcs.org DNS server 인 동시에 client!

4. as DNS client : resolver

5. search

6. nameserver

7. as DNS server : named  부팅 때 named 가 시작  named.boot

8. named.boot

9. DNS database  [name] [ttl][class] type data

10. DNS database - name  이름 / 절대 이름  절대 이름은.(period) 으로 끝남  Ex) domain : sparcs.org name : a  a.sparcs.org name : a.sparcs.org  a.sparcs.org.sparcs.org

11. DNS database - class  IN / CH / HS  IN

12. DNS database – type SOA  zone 의 처음에 와야함  @ IN SOA domain admin serial refresh retry expire minimum  @ IN SOA sparcs.kaist.ac.kr admin.sparcs.kaist.ac.kr 1001 21600 1800 1209600 432000

13. DNS database – type NS  SOA 다음에 …  Zone [ttl] [class] NS hostname  sparcs.kaist.ac.kr. IN NS ns.sparcs.kaist.ac.kr sparcs.kaist.ac.kr. IN NS ns2.sparcs.kaist.ac.kr

14. DNS database – type A  hostname [ttl] [class] A ipaddr  Ex) ravel IN A 143.248.234.112  (geogy)

15. DNS database – type PTR  Ipaddr [ttl] [class] PTR hostname  Ex) 143.248.234.112 IN A ravel  143.248.234.112.IN-ADDR.ARPA.  A 와 짝

16. DNS database – type MX  name [ttl] [class] preference hostname  Ex) ravel IN MX 10 ravel IN MX 20 mail IN MX 30 sparcs.org.

17. DNS database – other types  CNAME (nickname)  HINFO (System information)  WKS (supported services)  TXT (comment)  …..