#Dns

• Dns uses UDP (although it can use TCP as well) with a packet size of 512 bytes. $| Section | size | Type | purpose | | --------------- | --------------- | --------------- | --------------- | | Header | 12 bytes | Header | information about the query/response | | Question | variable | List of questions | domain in question and the requested record type | | Answer | variable | list of records | requested records | | Authority | Variable | list of records | a list of name servers to resolve queries recursively |