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Lecture 11: DNS and LDAP (Domain Name System (Zone file (In text…

- - - - C= Country
      - O = Organization
      - OU = Organization Unit
      - L = Location
      - CN = Common Name
        
        Name of the attributes in DIT
    - - DomainComponent=fb2 , DC= fh-frankfurt, DC=de
        order matter
- - - - Hostname: ns, www
      - Domain name: google
      - Top Level Domain TLD
        
        generic: .com, .org, .arpa
        
        geographical: .vn, .de, .us
  - - - Other resources
      - Mapping from domain name <-> IP add
    - - Basic information elements of the DNS
      - Structure: <NAME>(<TTL>)<CLASS><TYPE>(<WEIGHT>)<RDATA>
  - - - Full Resolver: responsible to follow Recursive queries
  - - - Request from a DNS server that is set to query subsequent DNS servers startting from top lelvel DNS Server until a definitive answer is found.
      - Glue: used to prevent circular dependencies
        
        Needed when you want to set a domain's nameservers to a hostname that is a subdomain of the domain itself.
    - - Return Resource Record from its own zone (bailwick)