blank.gif (43 bytes)

Church Of The
Swimming Elephant

Search:
6.4.2. Inverse query and response example Connected: An Internet Encyclopedia
6.4.2. Inverse query and response example

Up: Connected: An Internet Encyclopedia
Up: Requests For Comments
Up: RFC 1035
Up: 6. NAME SERVER IMPLEMENTATION
Up: 6.4. Inverse queries (Optional)
Prev: 6.4.1. The contents of inverse queries and responses
Next: 6.4.3. Inverse query processing

6.4.2. Inverse query and response example

6.4.2. Inverse query and response example

The overall structure of an inverse query for retrieving the domain name that corresponds to Internet address 10.1.0.52 is shown below:

HeaderOPCODE=IQUERY, ID=997
Question<empty>
Answer<anyname> A IN 10.1.0.52
Authority<empty>
Additional<empty>

This query asks for a question whose answer is the Internet style address 10.1.0.52. Since the owner name is not known, any domain name can be used as a placeholder (and is ignored). A single octet of zero, signifying the root, is usually used because it minimizes the length of the message. The TTL of the RR is not significant. The response to this query might be:

HeaderOPCODE=RESPONSE, ID=997
QuestionQTYPE=A, QCLASS=IN, QNAME=VENERA.ISI.EDU
AnswerVENERA.ISI.EDU A IN 10.1.0.52
Authority<empty>
Additional<empty>

Note that the QTYPE in a response to an inverse query is the same as the TYPE field in the answer section of the inverse query. Responses to inverse queries may contain multiple questions when the inverse is not unique. If the question section in the response is not empty, then the RR in the answer section is modified to correspond to be an exact copy of an RR at the first QNAME.


Next: 6.4.3. Inverse query processing

Connected: An Internet Encyclopedia
6.4.2. Inverse query and response example

Cotse.Net

Protect yourself from cyberstalkers, identity thieves, and those who would snoop on you.
Stop spam from invading your inbox without losing the mail you want. We give you more control over your e-mail than any other service.
Block popups, ads, and malicious scripts while you surf the net through our anonymous proxies.
Participate in Usenet, host your web files, easily send anonymous messages, and more, much more.
All private, all encrypted, all secure, all in an easy to use service, and all for only $5.95 a month!

Service Details

 
.
www.cotse.com
Have you gone to church today?
.
All pages ©1999, 2000, 2001, 2002, 2003 Church of the Swimming Elephant unless otherwise stated
Church of the Swimming Elephant©1999, 2000, 2001, 2002, 2003 Cotse.com.
Cotse.com is a wholly owned subsidiary of Packetderm, LLC.

Packetderm, LLC
210 Park Ave #308
Worcester, MA 01609