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1. Domain Name System이란 무엇인가요? (주관식)
사람들이 이해 할 수 있는 도메인 주소를 컴퓨터가 이해 할 수 있는 ip주소로 변환하는 일 입니당.
2. tcp/ip 스택 구조에서, DNS 프로토콜은 몇 계층의 프로토콜일까요?
4계층인 어플리케이션 계층
3. DNS 서버에 요청을 보내 www.kingbs.com의 ip주소를 얻으려고 할 때의 올바른 과정을 고르시오.- Root server ----------------------> Top Level Domain Name server -> Authoritative Name server-------> DNS cache server
- Top Level Domain Name server -> Root server ----------------------> Authoritative Name server -------> DNS cache server
- DNS cache server----------------> Root server-----------------------> Top Level Domain Name server -> Authoritative Name server
- DNS cache server----------------> Authoritative Name server----- -> Top Level Domain Name server -> Root server
3
기본적으로는 DNS cache server에 요청을 보내어 domain-ip mapping이 있는지 확인하고,
없으면 root -> tld -> authoritative server 순으로 요청을 보내어 domain에 해당하는 ip를 얻게 됩니다
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