Rcode erroranswer tc truncated aa authoritave code

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Unformatted text preview: OUNT | +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | ARCOUNT | +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ •  •  •  •  Id: m – 0=query, 1=response • QRatch response to query; QR: 0 query/1 response RCODE: error code. • RCODE – erroranswer, TC: truncated, AA: authorita)ve code • AA=authoritative answer, TC=truncated, RD: recursion desired, RA: recursion available RD=recursion desired, RA=recursion available Other RR Types •  CNAME (canonical name): specifies an alias www.google.com. 446199 www.l.google.com. 300 IN A IN CNAME www.l.google.com. •  MX record: specifies servers to handle mail for a domain (the part aaer the @ in email addr) •  SOA (start of authority) –  Informa)on about a DNS zone and the server responsible for the zone •  PTR (reverse lookup) 3600 IN PTR bayou.cs.uh.edu. hTp://en.wikipedia.org/wiki/List_of_DNS_record_types Inser)ng a Record in DNS •  Your new startup hTpserver.com •  Get a block of addresses from ISP –  Say •  Register helpme.com at GoDaddy.com (for ex.) –  Provide name and address of your authorita)ve name server (primary and secondary) –  Registrar inserts RR pair into the com TLD server: •  helpme.com NS dns1.hTpserver.com •  dns1.helpme.com A •  Configure your authorita)ve server (dns1.helpme.com) –  Type A record for www.hTpserver.com –  Type MX record for hTpserver.com Inser)ng a Record in DNS, cont •  Need to provide reverse PTR bindings –  E.g., - > dns1.hTpserver.com •  Normally, these would go into the 9.44.212.in- addr.arp...
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This note was uploaded on 01/27/2014 for the course COSC 4377 taught by Professor Staff during the Spring '08 term at University of Houston.

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